method statement sikaplan ® wp 1100 sheet · pdf filemethod statement sikaplan ® wp...

METHOD STATEMENT Sikaplan ® WP 1100 sheet membrane Waterproofing systems for basements and other below ground structures MARCH 2014 / 2

ND VERSION / SIKA SERVICES AG / HANS-JOERG STICH

TEMPLATE FOR LOCAL ADAPTION

Method Statement Engl./Corporate/Translation template

Sikaplan ® WP 1100 e.g. template for local adaption

Feb.2014, 1st draft

Basement waterproofing

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CONTENT

1. Scope .......................................................................................................................................................... 3

2. System decription ....................................................................................................................................... 3

2.1 Design- and construction requirements

2.2 Sheet membrane systems for basement waterproofing

2.3 Membrane installation

3. Products ............................................................................................................................................................. 6

3.1 Sikaplan® WP 1100 sheet waterproofing membranes

3.2 Ancillary products

4. Installation ................................................................................................................................................. 10

4.1 General Sikaplan WP membrane installation procedure

4.2. Waterproofing details on horizontal and vertical areas

5. Methods of thermoplastic weldings of sheet membranes………………………………………………………………………….19

6. Quality control of welded seams………………………………………………………………………………………………………………..20

7. Cleaning and inspection of completed work………………………………………………………………………………………………22

8. Protection of installed waterproofing………………………………………………………………………………………………………..22

9. Proposals for Bill of Quantities..………………………………………………………………………………………………………………….24

10. Standard details…………………………………………………………………………………………………………………………………………..33



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1 SCOPE

This Method Statement describes the step by step procedure for installation of the Sikaplan® WP 1100-series Sheet

Waterproofing Membranes and Sika® Waterbar AR/DR waterstop product range, which are both all based on

plasticized PVC and used for waterproofing of basements and other below ground structures against groundwater.

2 SYSTEM DESCRIPTION

Basements and other below ground structures usually need to be watertight to some degree according to their

function and use.

Waterproofing works are therefore required to prevent water ingress and leaks into the structure and also to

protect the structure itself against the harmful influences of aggressive groundwater or seawater.

Highly flexible single layer Sikaplan WP waterproofing membranes, or if required for even higher performance and

security, a double layer system can protect a structure from damp soil, percolating water and groundwater under

hydrostatic pressure.

In situations with leaks through a sheet waterproofing membrane system caused by mechanical damage to the

membranes, single or double layer systems, the water can underflow laterally and spread uncontrolled between the

installed membrane system and the structure. However, a compartment system formed by welding the membrane

system with waterstops and combined with control and injection ports / hoses provides the possibility of control and

repair by injection if required at any time after completion and throughout the service life.

Additional advantages of membrane waterproofing systems are that they are fast to install, and they

require minimal substrate preparation, plus the installed membrane system has high crack bridging

abilities. Any successful waterproofing system requires detailed design and specification by the

responsible design engineer prior to the membrane installation works being carried out on site.

The structure should be designed and built in such a way that the Sikaplan WP waterproofing

membrane system can adequately fulfil its function during its long service life. Installation must only

be performed by Sika trained and experienced Sikaplan WP sheet membrane waterproofing

contractors. The site personnel must always be specifically trained in the correct welding Procedures for

the Sikaplan WP sheet membranes.



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2. 1 DESIGN- AND CONSTRUCTION REQUIREMENTS:

The main criteria that have to be considered for the correct design and installation of the Sikaplan WP

flexible sheet membrane systems for waterproofing basements and other below ground structures are

the:

· type and function of the structure

· waterproofing of structures in open cut excavation, or against secant pile-, or diaphragm walls

· circumference of the waterproofing required of the level of waterproofing and its terminations

· type and design of the retaining walls

· piled foundations and the pile cap location

· lowering of groundwater level during construction (sump and pumping methods)

· condition of the substrate to be waterproofed

· thermal insulation details and requirements

· dimensions of the structure (length, width, depth)

· groundwater levels (max., min., average, immersion depth of structure)

· condition of groundwater (aggressive water, salt water, polluted water)

· expansion joint details and design

· construction phases construction/day work jointing schedule of structure

· requirements for a single, or double-ply waterproofing system with compartments and vacuum control

All elements protruding from or penetrating through the waterproofing membrane and cast into the

concrete, i.e. service and other pipe penetrations , structural steelwork and anchors, shafts etc. should

only be made of corrosion-free steel (i.e. stainless V2A or V4A steel), or other non-corroding materials.

Where necessary these elements should be designed with flanges in order to allow watertight sealing

around them with the membrane system.

In order to avoid any damage to the installed membranes and to ensure their proper function, the

following requirements must be met:

· the structure must be designed to minimise movement due to temperature, settlement and concrete

shrinkage, contraction etc.

· reinforcement bars in the concrete should be min. 30 mm below the surface

· all steel elements should be stainless, or anticorrosive materials (i.e. cast iron, V2A, V4A steel quality,

aluminium)

· the surface of the substrate being waterproofed should be smooth and uniform to avoid puncturing the

membrane under the future influence of hydrostatic pressure

2.2 SHEET MEMBRANE SYSTEMS FOR BASEMENT WATERPROOFING

The installation procedure for the waterproofing membranes depends on the:

· excavation i.e. open- cut with free access to the external walls, or internal retaining walls

· project design requirements

· damp soil contact, percolating water, or water under hydraulic pressure

· immersion depth below normal groundwater level

· selected membrane type and its fixing methods

· selected waterproofing approach, i.e. drainage system, waterstop system, active control system

Drainage systems

Waterproofing against damp soil contact and percolating water using single layer

membranes without welded compartments. This system is not suitable for use

against water under hydrostatic pressure.

Waterstop systems Waterproofing against damp soil contact and percolating water, plus water under

hydrostatic pressure, produced from a combination of single layer membranes and

waterstops-forming compartments (the most common standard sheet

waterproofing membrane based solution).

Active control system Waterproofing against water under hydrostatic pressure, combined with double

layer membranes and waterstop – compartments (allows highest security of water

tightness - surveillance with vacuum testing).



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The following installation instructions are divided into single operations, that may or may not all be applicable

according to the type and requirements of each project. The operational sequences must then also be defined

according to the specific project design and the construction requirements.

2.3 MEMBRANE INSTALLATION SEQUENCES

Single layer and double layer membrane systems

Open cut with free access to external walls:

· without retaining walls

· with retaining walls

(apart from the structure)

Installation sequence of the membrane is in two phases:

1. lining below the basement slab

· cast in place concrete structures (slab, walls, roof)

2. lining at walls and below ground roofs

Internally without access to external walls:

· diaphragm walls

· driven or cast pile walls

Installation sequences of membrane in one, or two phases:

· lining below basement slab and at retaining walls

· cast in place basement, wall- and roof structure

Subject to any other specific local requirements, the selection of the right Sikaplan WP membrane thickness is made

according to the anticipated immersion depth and the potential water pressure.

Immersion depth / water pressure exposure Sikaplan WP membrane

thickness

Damp soil and percolating water (to be combined with a drainage system) 1.5 mm

Hydrostatic pressure 0m - 10m 1.5 mm

Hydrostatic pressure 10m - 20m 2.0 mm

Hydrostatic pressure exceeding 20m 3.0 mm



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3. PRODUCTS

3.1 Sikaplan® WP 1100 SHEET WATERPROOFING MEMBRANES

Standard membrane products

(with signal layer 0.6 mm),

other thicknesses available on

inquiry

Sikaplan®

WP 1100 -15HL

(Sikaplan® 9.6)

Sikaplan®

WP 1100 -20HL

(Sikaplan® 14.6)

Sikaplan®

WP 1100 -30HL

(Sikaplan® 24.6)

Standard membrane products

(with signal layer 0.2 mm,

available on inquiry)

Sikaplan®

WP 1100 -15HL2

Sikaplan®

WP 1100 -20HL2

Sikaplan®

WP 1100 -30HL2

Colours top layer: yellow / reverse layer: dark grey

Material PVC-p membrane, fully homogeneous, not bitumen resistant

Specials (transparent acc. to French

Standard, on request)

Sikaplan®

WP 1110 -20H transparent (Trocal® T 2.00mm)

Material PVC-p membrane, fully homogeneous, not bitumen resistant

Specials (black, oil and bitumen

resistant on request)

Sikaplan®

WP 6110 -15H black (Trocal® A 1.50mm)

Sikaplan®

WP 6110 -20H black (Trocal® A 2.00mm)

Material PVC-p membrane, fully homogeneous, oil and bitumen resistant

Use Waterproofing of basements and all types of below ground structures

against groundwater

Membrane thickness and roll sizes according to the respective Product Data Sheets

Suitable for exposure and resistant

to:

• ageing and weathering during installation works

• aggressive influences occurring naturally in groundwater

• salt water

• accidental puncturing

• algae and micro-organisms

• hydrostatic pressure (according to the defined membrane thickness)

• root penetrations

• remain flexible at low temperatures



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3.2 ANCILLARY PRODUCTS

Sikaplan® WP Fixation Plate PVC

Description / Material Fixing plate based on rigid PVC

Colour light grey

Size and thickness 90mm x 2000mm x 5mm

Use For the linear fixing of Sikaplan® WP 1100 waterproofing sheets. Strip to be cut to the

required lengths. Fixing with screws, or metal dowels into reinforced concrete

substrates. The Sikaplan WP 1100 membrane to be heat welded on fixed plates.

Sikaplan® WP Disc 80/10mm

Description / Material Fixing disc based on plasticised PVC

Colour yellow

Size 80mm dia. x 10mm thickness

Use For the spotwise fixing of Sikaplan® WP 1100 waterproofing sheets. The Fixing Disc are

fixed with screws, or metal dowels into reinforced concrete, or shotcrete substrates. The

Sikaplan WP 1100 membrane to be heat welded on fixed discs.

Sika® Waterstops, type AR / DR / AR Inject

Description / Material Preformed profiles based on plasticised PVC with/without integrated injection pipes

Colours grey, yellow

Size according to their respective Product Data Sheets

Use Cast in concrete waterstops for creating of compartments and linear fixings of

Sikaplan® WP 1100 waterproofing sheets exposed to groundwater under hydrostatic

pressure



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Sika® Dilatec, type E / ER joint sealing tapes

Description / Material Joint sealing tapes based on plasticised PVC with integrated fleece edges

Colour grey (white fleece edge strips)

Size according to their respective Product Data Sheets

Use Surface applied joint sealing tape, that are bonded on to the concrete with Sikadur® -31

epoxy adhesive to create compartments and for linear fixings of Sikaplan® WP 1100

waterproofing sheets exposed to groundwater under hydrostatic pressure

Sikaplan® WP Trumpet Flange

Description / Material Preformed injection flange in trumpet shape based on plasticised PVC

Colour black

Size according to the respective Product Data Sheet

Use Single point injection access port, that are installed on Sikaplan WP membranes and then

connected with metal nipple and metal pipe for control of water-tightness and injection

of compartment waterproofing system, once cast in concrete

Sikaplan® WP Control Socket 14

Description / Material Preformed injection flange based on plasticised PVC

Colour yellow

Size according to the respective Product Data Sheet

Use Single point injection access port, that are installed on Sikaplan WP membranes and then

connected with injection hose for control of water-tightness and injection of

compartment waterproofing system, once cast in concrete



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Sikaplan® WP Protection Sheets

Description / Material Fully homogeneous PVC-p based sheet membrane, not bitumen resistant with smooth

surface

Colour Dark-brown - black

Sheet size according to the respective Product Data Sheets

Use Protection of installed waterproofing membranes against mechanical damage

Sikaplan® WP Protection Sheets HE

Description / Material Fully homogeneous PVC-p based sheet membrane, homogeneous, not bitumen resistant

with embossed surface

Colour Dark-brown - black

Sheet size according to the respective Product Data Sheets

Use Protection of installed waterproofing membranes against mechanical damage.

Embossed surface faced to waterproofing membrane allow free space for pressure

control and injections

Sikadur® - 31 EP adhesive, normal and rapid

normal rapid

Description / Material two part epoxy resin based adhesive for bonding of Sika Dilatec E/ER type joint tapes to

concrete surfaces

Colour grey

Packing according to the product data sheet

Use For bonding applications at ambient

temperature of + 10°C until + 30°C

For bonding applications at ambient

temperature of + 5°C until + 15°C

Membrane Cleaner

Sarna Cleaner Sika-Trocal Cleaner

Description / Material Solvent containing cleaner Solvent-free cleaner

Colour clear liquid

Packing according to the respective Product Data Sheets

Use Cleaning of contaminated membrane surface



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4. INSTALLATION

4.1 GENERAL SIKAPLAN WP MEMBRABE INSTALLATION PROCEDURE

The installation of Sikaplan® WP waterproofing sheets must only be performed by skilled and experienced

waterproofing contractors, trained in Sikaplan® WP membrane welding and installation.

In finalising their tender submissions the waterproofing contractor must always have the possibility to inspect the

site conditions beforehand.

The membrane installation works can be performed in dry weather conditions and ambient temperature of at least

min +5°C.

Membrane rolls, geotextile rolls, etc. must be stored in

horizontal positions in dry areas and protected against

exposure to weathering on site.

In order to prevent damage of the installed

waterproofing membranes, unauthorised individuals

must be prevented from having access to the work area

during and following the installation.

The waterproofing contractor's personnel must only

wear suitable shoes with rubber soles, when walking on

installed membranes. Smoking and open flames must

not be permitted on site. Heat welding machine

operators must be trained and instructed on the safety

of electrical equipment for site welding procedures.

In order to prevent mechanical damage by third parties, the installed membranes must be temporarily protected

and/or must be kept under surveillance until their final covering with protective layers.

SUBSTRATE PREPARATIONS

Substrates of blinding, or concrete surfaces below foundation slabs:

The surface of the concrete or mortar must be smooth (steel float finish) and all edges / corners must be rounded to

min. radius 5cm. Any projections from the substrate must be removed mechanically by chiselling and / or grinding;

nails and wires or loose aggregates must be removed. Any protective mortar layer must have a layer thickness of

min. 5cm, if necessary with light reinforcement, to be covered min. 3cm with mortar. The maximum aggregate

diameter of mortar screeds must not exceed 4mm. The whole surface must be thoroughly cleaned using high

pressure water. Ponding water must be removed and the whole surface must be dried e.g. by using compressed air.

Substrate surfaces on refurbished concrete structures:

Any existing membrane linings, as well as any debonded rendering and screeds must be removed. Larger cracks and

honeycombing must be broken out and reprofiled with repair mortars. Water infiltration must be stopped and

sealed, either with waterproofing mortars, or by injection with acrylic resin, or micro-fine cement grout. New

rendering and screeds must be applied on blast clean substrates, its maximum aggregate diameter must not exceed

4mm and its surface must be steel-trowel finished. Edges must be chamfered. The whole surface must be

thoroughly cleaned using high pressure water. Ponding water must be removed and the whole surface dried e.g. by

using compressed air.



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Substrate surfaces on new concrete structures:

The surface of the concrete must be smooth (steel trowel finish, resp. first class formwork quality) and edges must

be chamfered. Reinforcing steel bars must be covered min. 3cm. Any projections in the cementitious substrate must

be removed by chiselling and grinding; nails and wires must be removed. Any honeycombed concrete must be

broken out and reprofiled with repair mortar. Water infiltration through cracks of concrete structures, or along steel

elements must be sealed, either with waterproofing mortar or by injection of acrylic resin, or micro-fine cement

grout. The maximum aggregate diameter of rendering and mortar screeds must not exceed 4mm. The whole surface

shall be thoroughly cleaned using high pressure water. Ponding water must be removed and the whole surface must

be dried e.g. by using compressed air. Substrate preparation requirements prior to application of Sikadur® -31 EP

adhesives must be according to its Product Data Sheet.

Substrate surfaces on shotcrete / gunite:

Unevenness of a shotcrete surface must not exceed the ratio of length to depth unevenness of 5 : 1 and its min.

radius must be 20cm. The shotcrete surface must not contain broken aggregates. When these requirements cannot

be fulfilled, it is recommended to apply a fine sprayed mortar layer on the shotcrete surfaces to a min. thickness of

5cm and with max. aggregate diameter not exceeding 4mm. Steel elements (girders, reinforcement mesh, anchors

etc.) must be covered min. 3cm. Any local water infiltration must be stopped and sealed either with a Sika

waterproof plugging mortar, or drained with suitable perorated hose. The prepared surface must be clean and free

of loose debris (no loose aggregates, nails, wires, etc.).

PROTECTIVE LAYERS

The installed waterproofing membrane must be protected against damage from the ground or hard material /

elements with a geotextile cushion layer. The geotextile must be based on of Polypropylene non-woven fabric,

needle punched, or thermally cured (chemically cured geotextiles are not compatible with membranes and shall

therefore not be used).

The geotextile must have min. unit weight of 500g/m2

for use on smooth concrete substrates. Geotextiles must be

loose laid and be overlapped min. 100 mm on horizontal areas and be free of loose materials.

The physical properties of geotextiles must also fulfil the requirements of any relevant local standards for the

protection of membrane waterproofing systems.

4.2 WATERPROOFING DETAILS ON HORIZONTAL AND VERTICAL AREAS

The installation procedure for waterproofing membranes depends on the:

· excavation method (open cut / internal to retaining walls)

· project design

· selected membrane type and its fixing methods

· selected waterproofing system (single layer / double layer)

As an outline for guidance the following work sequences can be considered as normal practise:

Open cut excavation method system:

The structure is built in an excavated space with free access to the edges of slabs and external walls, or the

excavation is retained with driven steel piles with working space between external walls and these retaining walls.

The Sikaplan WP membrane installation is performed in two phases:

1. below the basement slab, prior to concreting

2. to external walls



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1st phase (horizontal)

· installation of the geotextile on prepared

substrate

· installation of waterproofing membrane, incl.

the details as required

· if specified the installation of 2nd

layer

waterproofing membrane, incl. details

· if specified the formation of compartments

· preparation of membrane edges for

overlapping and welding to the waterproofing

at walls

· installation of protective layers

2nd phase (vertical)

· installation of geotextile

· installation of waterproofing membrane, incl.

the details as required and welding of

membrane at the prepared slab-wall junctions

· if specified, installation of 2nd

layer


· installation of protective layers

Construction of basement slab and walls; installation of waterstops (if specified)

Diaphragm wall / Shafts / Internal working space only methods:

The structure is built in an excavated space, retained with secant piles, or diaphragm walls. The Sikaplan WP

membrane installation is performed in one phase: below the basement slab (horizontal), and to the retaining walls

(vertical), prior to the pouring of the concrete slab and wall structures.

horizontal

· installation of geotextile on prepared

substrate

· installation of waterproofing membrane,

including details

· if specified installation of 2nd

layer


· if specified formation of compartments

· preparation of membrane edges for

overlapping and welding to waterproofing at

walls

· installation of protective layer on membrane



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vertical

· installation of geotextile

· installation of membrane, including details and

welding of membrane at the prepared slab-wall

junctions

· if specified installation of 2nd

layer waterproofing

membrane, incl. details

· if specified formation of compartments

Construction of the basement structure (slab and walls) to the completed waterproofing. The above mentioned

guidelines should be divided into single operations with various fixing options, according to the design of each

project. The precise operational-sequences must be defined according to the individual project requirements.

Waterproofing termination details

Where not specified in the relevant standards, the membrane waterproofing system must be terminated min.

1.00m above maximum groundwater level and minimum 0.15m above ground level. The vertical waterproofing may

be linear fixed at terminations for the top of vertical loose hanging membranes if the height does not exceed 4.00m

(exception: compartment systems with waterstops). Waterproofing of vertical surfaces, which exceeds 4.00m high,

requires intermediate linear, or spot fixings at maximum vertical distances of 2.00m.

Termination detail using Sikaplan® WP Fixation Plates PVC:

Unroll and position of the geotextile protective layer, overlapped 100 mm and fixed with Sikaplan® WP Fixation

Plates PVC and leave loose hanging on the wall. Mount the Sikaplan® WP Fixation Plates PVC (size 90mm x 2000mm,

mounting holes ø 5mm at 120 mm centres). The top of the plates must be positioned min. 1.00m above max.

groundwater level and min. 0.15m above ground level.

Between each plate there must be a gap of 2mm. The plates must be fixed with countersunk screws (dia.

4.5mm/length 20 mm, stainless steel) and dowels into the reinforced concrete. These plates must not go across

expansion joints. The gap between the concrete surface and profile must be sealed with a permanently elastic

silicone based sealant (i.e. Sikasil®

C). The bonding of sealant on the substrate requires application of a suitable

primer. Once the membrane is heat welded at the mounted plates the waterproofing must be protected against UV-

light and mechanical damage.

Termination detail using Aluminium-sheet metal, formed into profiles (by others):

Unrolling and positioning of the geotextile protective layer, overlapped at edges 100 mm and temporarily fixed into

the substrate (i.e. with nails). Unrolling and positioning of the waterproofing membrane, min. 80mm overlapped

heat- welded, and temporary fixed to the substrate (i.e. with adhesive tapes). Mount the Aluminium-profiles (size

1.5mm x 40 mm x 4000 mm, mounting holes ø 5mm in distance of 150 mm). The top level of the profiles must be

positioned min. 1.00m above max. groundwater level, and min. 0.15m above ground level. Between each profile

there must be a gap of 5mm. The profiles must be fixed with stainless steel screws (dia. 4.5mm/length 20 mm) and

dowels into reinforced concrete.

The gaps between the profiles must be covered with 20 mm-adhesive tapes. The profiles must not cross expansion

joints. The gap between the concrete surface and the profile must be sealed with a permanently elastic silicone

sealant (i.e. Sikasil®

C). The bonding of sealant on its substrate may require the application of a suitable primer. Once

the membrane is fixed with the profiles, the waterproofing membranes must be protected against UV-light and

mechanical damage.



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Caution: due to the incompatibility of Aluminium metal surface with concrete, cement or mortar, the mounted

profile must not be in direct contact with cementitious substrates, or exposed to cement slurries run off from any

sources.

Termination detail with Sikaplan® W flat profile 30/4 V4A:

Unrolling and positioning of the geotextile protective layer, overlapped at edges 100 mm and temporarily fixed into

the substrate (i.e. with nails).Unrolling and positioning of the waterproofing membrane, min. 80mm overlapped

heat- welded, and temporarily fixed to the substrate (i.e. with adhesive tapes).

Mount the Sikaplan® W flat profiles 30/4 V4A (size 4mm x 30 mm x 2000mm). The top level of the profile must be

positioned min. 1.00m above max. groundwater level, and 0.15m above ground level. Between each profile must be

a gap of 5mm. The profiles must be fixed with countersunk screws (stainless steel) and dowels into reinforced

concrete. The mounted profile must not cross expansion joints. The gap between the concrete surface and the

profile must be sealed with a permanently elastic silicone sealant (i.e. Sikasil® C ). The bonding of the sealant on the

substrate requires the application of a suitable primer. Once the membrane is fixed with the profile, the

waterproofing must be protected against UV-light and mechanical damage on site.

Termination by welding at Sika® Waterstops, type AR / DR:

Mount the Sika® Waterstops, type AR, with the flat side facing the formwork. Seams of waterstops must be butt

jointed and heat welded (also for T- junctions- and expansion joints-elements). The top level of the waterstop must

be min. 1.00m above max. groundwater level, and min. 0.15m above ground level. After concreting works, unroll

and position of the geotextiles, provisionally fixed (i.e. with adhesive tapes), respective terminated under

waterstops and loose hanging. The flat surface of the waterstops must be clean, free of dust, cement, mortar etc.

and free from oil or grease. Heat welding the waterproofing membrane onto the waterstops (membrane loose

hanging). Once the membranes are fixed to the waterstops, the waterproofing must be protected against UV-light

and mechanical damage.

Termination by welding at bonded Sika® Dilatec, type ER joint sealing tapes:

Bond Sika® Dilatec, type ER joint sealing tapes with Sikadur

® -31 EP epoxy adhesive on prepared concrete substrates.

Preparation of substrate according to Product Data Sheet for Sikadur® -31 adhesive. The top level of the bonded

tape must be minimum 1.00m above maximum groundwater level, and minimum 0.15m above ground level. After

bonding works, unroll and position the geotextiles, provisionally fixed (i.e. with adhesive tapes), resp. terminated

under bonded joint strips and loose hanging. The exposed surface of the bonded strips must be clean, free of dust,

residues of cured epoxy adhesive, etc. and free from oil or grease. Heat weld of waterproofing membranes onto the

exposed part of bonded joint tape (membrane loose hanging). Once the membrane is welded to the joint tape, the

waterproofing must be protected against UV-light and mechanical damage.

Fixings on vertical areas

Intermediate fixings on walls:

Required for wall height, exceeding 4.00m and for compartment systems

Fixings with Sikaplan® WP Fixation Plates PVC:

Mount the Sikaplan® WP Fixation Plates PVC (size 90mm x 2000mm, mounting holes ø 5mm at 120 mm centres). The

plates must be fixed in horizontal directions and at a vertical spacing of maximum 2.00m at the loose hanging

geotextile. Between each profile must be a gap of 2mm. The profiles must be fixed with countersunk screws (dia.

4.5mm/length 20 mm, stainless steel) and dowels into the reinforced concrete. The mounted plates must not go

across expansion joints. Heat weld of the waterproofing membrane onto the mounted Sikaplan® WP Fixation Plate

PVC. Once the membrane is fixed by the profiles the waterproofing must be protected against UV-light and

mechanical damage.



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Welding to Sika® Waterstops, type AR / DR:

Mount the waterstops (PVC / one side ribbed) with the flat side fixed to the formwork, seams (also cross junctions

and for expansion joints) with but joints heat welded. The positioning of the waterstops must be according to the

specified compartment concept. After the concreting works and removal of formworks, unroll and position of the

geotextiles, provisionally fixed (i.e. with adhesive tapes), resp. terminated under waterstops and loose hanging. The

flat surface of the waterstops must be clean (dust, cement, etc.) and free from oil or grease. Heat weld of the

waterproofing membrane onto the waterstops (membrane loose hanging).

Welding to bonded Sika® Dilatec, type E joint sealing tapes:

Bond Sika® Dilatec, type E joint sealing tapes on prepared concrete substrate with Sikadur

® -31 EP adhesive. Prepare

the substrate according to Product Data Sheet for Sikadur® -31 adhesive. The positioning of the bonded tapes must

be according to the specified compartment concept. After bonding works and after the adhesive is cured, unroll and

position of the geotextiles, provisionally fixed (i.e. with adhesive tapes), respective terminated under bonded joint

tape and loose hanging. The exposed surface of the bonded tape must be clean, free of dust, residues of cured

epoxy adhesive, etc. and free from oil or grease. Heat weld of waterproofing membrane onto the exposed part of

bonded tape (membrane loose hanging).

Spot fixing by welding at nailed Sikaplan® WP Disc in shotcrete / gunite substrate:

Fixing of Sikaplan® WP Disc discs (ø 80mm) on geotextile into shotcrete, or concrete (the geotextile is fixed with this

operation also). The discs must be fixed with nail guns into the shotcrete, or with dowels into predrilled holes in the

concrete (i. e. Hilti DX nail gun system / Hilti type DX nail / washer and compatible cartridges). The fixing grid spacing

must be min. two fixings each membrane rolls width in the horizontal direction and maximum every 2.00m in the

vertical direction. Heat welding of the waterproofing membrane onto the fixed discs.

Spot fixing with suspended straps made of Sikaplan® WP 1100 membranes:

Cut fixing straps of Sikaplan® WP 1100 membrane from membrane roll (size approx. 50 mm x 200 mm). Fix of

Sikaplan® WP 1100 membrane straps on geotextile into shotcrete / gunite, or concrete (the geotextile is fixed with

this operation also). The fixing of membrane straps must be executed with nail guns into the shotcrete, or with

dowels into predrilled holes in the concrete (i. e. Hilti DX nail gun system / Hilti type DX nail / washer and compatible

cartridges). The grid distance shall be min. two fixings each membrane roll width in the horizontal direction and

max. 2.00m in the vertical direction. Heat weld of the waterproofing membrane at the fixed straps.

Fixings on vertical corners

Fixings with Sikaplan® WP Fixation Plates PVC:

Mount the Sikaplan® WP Fixation Plates PVC (size 90mm x 2000mm, mounting holes ø 5mm at 120 mm centres). The

plates must be fixed in horizontal directions and at a vertical spacing of maximum 2.00m at the loose hanging

geotextile. Between each profile must be a gap of 2mm. The profiles must be fixed with countersunk screws (dia.

4.5mm/length 20 mm, stainless steel) and dowels into the reinforced concrete. Heat weld of the waterproofing

membrane onto the mounted Sikaplan® WP Fixation Plate PVC. Once the membrane is fixed by the profiles the

waterproofing must be protected against UV-light and mechanical damage.

Fixings with Aluminium-metal strips (supplied by others) in membrane overlaps:

Mount Aluminium-metal strips (size 4mm x 20 mm x 4000 mm, edges rounded/mounting holes ø 5mm in spacing of

150 mm) at edge (seam overlap) of waterproofing membrane roll. Between each strip ends shall be a gap of 5mm.

The profiles shall be fixed with countersunk screws (dia. 4.5mm/length 20 mm, stainless steel) and dowels into

reinforced concrete. Heat weld of the overlapping membrane roll over top of the fixing.



Feb.2014, 1st draft


16/43

Waterproofing details on horizontal and vertical areas

Membrane intersection detail between horizontal - vertical areas (prayer seams):

Below foundation slaps (suitable for single layer waterproofing only):

Loosely layout and heat weld the waterproofing membrane (horizontal) over the geotextile and the mortar screed

below the foundation slab. The edge of the membrane should extend approx. 1.00m over the intersection line.

Loosely layout of geotextile strip (width approx. 0.40m) at the intersection line on the installed membrane. The

extended membrane part must be lapped over the geotextile strip as provisional loop and heat welded on installed

waterproofing membrane. After installation of compartment, loosely layout the geotextile on the prepared

waterproofing membrane (including over provisional loop), to be overlaid with PE foil 0.30mm (its overlaps sealed

with adhesive tapes), or alternatively overlaid with Sikaplan® WP protection sheets.

Apply protective mortar layer on the PE-foil (cement min. 300kg / m³, aggregate ≤ ø 4mm, thickness min. 5cm ).

Once the concreting works of slab and walls are completed, the protective layers (mortar screed, geotextile) can be

carefully removed. The provisional loop of membrane should be cut off and the geotextile strip removed. Heat

welding of the vertical waterproofing on clean membrane of their horizontal waterproofing as a ‘prayer’ seam. The

protective layers over finished ‘prayer’ seam must then be reformed as a base for the protective layers for the walls.

Intersection detail at retaining walls, or at formwork of foundation slaps:

Loosely layout and heat weld of waterproofing membrane (horizontal) over the geotextile and the mortar screed

below the foundation slab. The temporary edge of the membrane shall extend to vertical wall up to 0.50m above

the surface level of the foundation slab and fixed temporary on the retaining wall, or on the formwork of foundation

slab. If a double layer waterproofing system is specified, install second layer of waterproofing membrane. After

installation of compartment, loosely layout the geotextile on the prepared waterproofing membrane, ready to be

overlaid with PE foil 0.30mm (its overlaps sealed with adhesive tapes), or alternatively with Sikaplan® WP protection

sheets. Apply the protective mortar layer (cement min. 300kg / m³, aggregate ≤ ø 4mm, thickness min. 5cm ).

Membrane penetrations:

Waterproofing details around penetrations (pipe-/anchor steel flanges, etc.) must be installed prior to the

membrane waterproofing works. The surface of steel must be smooth, clean and free of oils and grease. Create

membrane sealing rings (min. one for each penetration), cut from the rolls of same type of Sikaplan WP

waterproofing membranes.

Cut these to size according to the dimensions of the penetrations / flanges. Cut an opening in the main

waterproofing membrane, equal to the size of the penetration. Overlapping seams of membrane must be bypassed

around penetration by using additional separate membrane piece. Do not allow membrane overlaps within any

flanged areas. The membrane must be welded outside of flanges, when double layer membrane system has to be

installed.

The prepared sealing rings must be heat welded onto the waterproofing membrane within the flanged area. Holes

in equal diameter to any bolts must be punched through both, the membrane and the sealing ring, exactly at the

locations of the bolts. This prepared pieces of waterproofing membrane, incl. welded sealing ring shall then be

slipped over the base flange and be fixed to the pressure flange (the membrane shall not be loose or folded and the

membrane sealing rings must not be “fish mouthed”).

Bridge over expansion joints:

Mount support steelwork structure over expansion joints in walls and on roof slabs below ground (for waterproofing

of structures without compartment system only): mount of stainless steel sheets (size 200 mm x 2000mm / fixing-

holes, dia. 5mm, distance 150 mm) on o this on side only. The one-sided fixings must be made with countersunk

screws and dowels (dia.4.5mm / 20 mm length / stainless steel). Between the ends of metal sheet elements shall be

a gap of 2 - 3mm, which must be covered with 20 mm adhesive tape.



Feb.2014, 1st draft


17/43

Installation of the waterproofing membranes

Vertical waterproofing:

Check the surfaces of geotextiles and mounted metal profiles and details etc. for loose debris or sharp projections

that must be removed prior to membrane installation. The membranes must be then be unrolled and installed

vertically on the walls using the selected method of fixing:

· Fixation Plates PVC: heat welding of waterproofing membrane at plates

· Aluminium-profiles: acc. to separate description

· Aluminium-strips: acc. to separate description

· Sika Discs: acc. to separate description

· Surface waterstop: acc. to separate description

· glued joint sealing strips: acc. to separate description.

Operational sequences:

1. cut the membranes to the approx. size required

2. allow min. 80mm membrane overlaps

3. install the membranes with the selected fixing method at termination and at intermediate fixing points on

the wall

4. repeat steps 1. - 3. with next membrane roll

5. heat weld of the vertical overlaps working from bottom to top, then weld the installed membrane to the

prepared details (i.e. around corners and penetrations)

6. repeat steps 1. – 5. for second layer of membrane, if double layer system is specified

Horizontal waterproofing:

Check the surfaces of geotextiles and mounted metal profiles and details etc. for loose debris and sharp projections

that must be removed prior to membrane installation. Irregular shapes of basement slabs need special

consideration of the membrane laying direction in the base (i.e. the most optimised solution regarding cut loss and

overall membrane consumption)

Operational steps:

1. cut the membranes to the approx. size as required

2. allow minimum 80mm membrane overlaps

3. unroll and position the membrane with sufficient overlaps at edges for connection to the installed vertical

waterproofing

4. temporary ballast the positioned membrane (i.e. with sand bags)

5. repeat steps 1. - 4. with next sheets, weld membrane overlaps and weld the installed membrane at

prepared detail (i.e. penetrations) and weld the membrane to the vertical waterproofing at edges of

basement slabs

6. repeat steps 1. – 5. for second layer, if double layer membrane system is specified

Compartment waterproofing: creation and connection to surface waterstops:

Surface waterstops for compartments, must be made of heat weldable plasticised PVC, compatible to PVC

waterproofing membrane and profiled with ribs on one side, or it must be made of bonded joint tapes on base of

PVC. Dependent on the type of structures waterproofing membranes must either be heat welded on surface

waterstops, respective on bonded tapes , or surface waterstops must be heat welded on waterproofing membranes:

open cut excavation Piled shafting / diaphragm wall

Basement slabs waterstop on membrane waterstop on membrane

Walls membrane on waterstop waterstop on membrane

Roof slabs membrane on bonded tape (Sika® Dilatec

system)

membrane on bonded tape

(Sika® Dilatec system)



Feb.2014, 1st draft


18/43

For single layer waterproofing system, each compartment area of the waterproofing must not exceed 150m².

According to the type of structure, method of construction and the schedule, the layout and positioning of

waterstops and bonded joint sealing tapes must be designed and agreed with the responsible engineer. Surface

waterstops, that are to be prepared and installed during the concreting works, must be fixed firmly to the formwork.

Cross- and T-junctions of these waterstops must be prefabricated by skilled factory welding from Sika or a qualified

local workshop.

For double layer waterproofing systems, the compartments must be created according to following requirements:

1. compartments within membrane layers: each field shall not exceed 100m2

2. compartments with waterstops on the top layer of membrane: each compartment must not exceed 600m2

3. vertical compartments with waterstops at the top layer of membrane: each compartment must not exceed

400 m2

4. defined positions of control and injection ports and hoses

5. defined positions of welds between membrane layers and waterstops

6. defined positions of welds between membrane layers

Heat welding waterproofing membranes on the flat surface of Sika® Waterstops, cast into the concrete:

Install geotextile cushion layer on concrete substrate, temporarily fixed (i.e. with adhesive tapes), or terminated

with overlaps close to the waterstop. The flat surface of the waterstop must be clean and free from dust, cement

slurry and free from oil or grease. Any projecting welding seams on the waterstops must be cut off with knives. Heat

weld the Sikaplan® WP waterproofing membranes onto the Sika

® Waterstop type AR / DR. Heat weld the

waterproofing membrane edges on both sides of joint with expansion joints using Sika® Waterstops, type DR, the

remaining membrane over the joint opening must be covered a with another membrane strip (width > 20cm) that

must be welded on both membrane edges.

Heat welding Sika® Waterstops on installed Sikaplan WP waterproofing membranes:

The surface of installed membrane must be clean and free of dirt oils and grease. The welded seams must be

inspected for water tightness and the membrane edges must be chamfered (i.e. with peeling knives). Any projecting

welding seams on the waterstops must be cut off with knives. If the side laps of waterstop type exceed 50 mm, the

the waterstop can be heat welded directly to the membrane using a hand held manual welder. Direct welding of

waterstops with side laps of less than 50 mm requires the use of semi-automatic welding machine type Leister Triac

Drive. If such welding tool is not available and the widths of side laps are less than 50 mm, the strips of Sikaplan WP

waterproofing membranes must first be heat welded on the flat reverse of the waterstops.

Operational steps as follows:

Heat weld of Sikaplan® WP waterproofing membrane strips (width 20cm: ≤ 10cm welding on waterstop /

≥ 10cm for later welding on waterproofing membrane) on both flat sides of the waterstop. The membrane strips

must be butt-jointed (no overlap seam), staggered from the the waterstop welded joints. The prepared waterstop

must then be heat welded with the remaining laps of membrane strips.

Mounting of Sikaplan® WP Control Socket or Sikaplan WP Trumpet – Flange:

The control- and injection ports with PVC flanges are connected with clamping rings to metal pipes or plastic hoses

with minimum length equivalent to the thickness of the wall or slab. These pipes or hoses are used for access to

each compartment to monitor and control the water tightness and when required, seal any leaks by the injection of

suitable resins. The correct function of these pipes requires minimum three pipes in each compartment, one at the

lowest, one in the middle and one at the highest point. The position of these control- and injection ports in a control

box in the internal side of a structure must be designed to allow easy access for use throughout the service life of

structure .

These pipes / hoses are mounted on the steel reinforcement bars and the PVC flanges are fixed to the formwork or

spot welded on the installed waterproofing membrane. Pipes and sockets must be closed and secured during

concreting works so that no cement slurry can penetrate into the pipe.



Feb.2014, 1st draft


19/43

Waterproofing termination with waterstops on pile caps:

Erect formwork around pile caps at the level of the basement slab. Mount the surface waterstop (in plasticised PVC,

profiled with ribs to one side), to be fixed with the flat side to inside face of formwork and its butt joint welded.

The top level of pile cap must not exceed the top level of waterstop. Reinforcement according to the engineer

specified requirements. Pour the sealing grout (i.e. Sika® Grout) into the space between the waterstop and concrete

of the pile head. Cover top level of the pile head with watertight Sikadur® -42 epoxy resin mortar. After removal of

the formwork, the surface of waterstop must be cleaned and free from cement, oil and grease. Heat weld the

waterproofing membrane to the waterstop.

5. METHODS OF THERMOPLASTIC WELDINGS OF PVC SHEET MEMBRANES

Operational steps:

· Seam overlaps of the membranes must in all cases be minimum 80mm

· The width of the finished welded seam (single or double seam) must be at least > 30 mm

· Prior to welding procedure, membrane surfaces shall be dry, clean, and free of dust, oil and grease etc.

· Sikaplan® WP membrane surfaces must be cleaned preliminary to welding procedure in case of polluted

surface with Sarna Cleaner or Sika-Trocal® Cleaner 2000

· Prior to any heat welding work conduct a welding test with membrane specimen (mandatory in order to

adjust welding temperature and speed of the machine)

· For continuous welding performance and weld quality, it is recommended to run welding equipment

connected with own direct power supply, or using its own generating set

· Welding machine operators must be trained and experienced in Sikaplan WP heat welding and familiar with

all relevant local regulations including operating in wet, or humid conditions

Heat welding tools

Sikaplan® WP waterproofing membranes can be welded by using suitable heat welding machines of any type.

Manual weldings:

· hand held welding gun i.e. type Leister Triac S, Triac PID, 220 V, resp. 110 V (www.leister.com)

· hand held welding gun i.e. type BAK Rion, 230 V (www.bak-ag.com)

· heat nozzles 40 mm and 20 mm, or 30 mm all purpose-nozzle

· hand held pressure (Silicone) roller with ball bearing (from the same welding machine supplier), in widths

of 20 mm and 40 mm

· always hold a reserve heating element ready on site

Semi-automatic welding for horizontal and vertical waterproofing:

· hand held semi-automatic, self-propelled welding machine, i.e. type Leister Triac Drive, 220V, resp. 110V

with adjustable temperature and speed control of the pressure roller (www.leister.com)



Feb.2014, 1st draft


20/43

Automatic welding for horizontal and vertical waterproofing:

· automatic, self-propelled welding machines, i.e. types Leister Twinny S, Twinny T, Comet ( with adjustable

temperature, speed and pressure), 220/380V (www.leister.com)

· automatic, self-propelled, i.e. types BAK Mion, Comon (adjustable temperature, speed and pressure),

230 V (www.bak-ag.com)

manual welding semi-automatic welding automatic welding

6. QUALITY CONTROL OF WELDED SEAMS

Testing of welded seams:

All welded seams must be tested for water-tightness. Testing methods depend on available testing equipment

and/or the projects specification. These testing methods include:

Visual test with a flat head screw driver:

· correctly heat welded single seams show continuous welding ‘rope’ at the seam edge. Irregular, or

interrupted welding rope can therefore be the sign of voids or capillaries in the seam

· glide the head of the screw driver (approx. size 2) using slight pressure along the seam edge and check

visually

· any voids or capillaries that are identified must be rectified manually using hand held welding gun and 20

mm Silicone roller

Physical testing with air pressure, i.e. with a testing kit (suitable for double seam weldings only):

· all double seam welds must be tested with compressed air using the available testing kit, that contain

testing needle, reverse flow valve, manometer gauge and air pressure pump (manual, or electric)

· seal central air channel with clamp at both ends of welded seam being tested

· insert the testing needle into the air channel, connected with reverse flow valve and manometer at one

membrane overlap end. Connect testing kit to hose of manual, or electric compressed air pump.

· inflate air channel until pressure of 2.0 bar is achieved. Close the reverse flow valve. Disconnect the air

hose from testing needle. Check air pressure 20 minutes after inflation procedure.

· the welded seam can be regarded as tight, if the pressure decrease is less than 20% from the original 2.0

bar during this 20 minutes. Release clamps from both ends of double weld seam and heat weld close the

opening by heat welding. Then, heat weld membrane patch over membrane penetration, caused by

insertion of testing needle with hand held welding machine. Sign approved and tight seam with marking

pen. Record the test in paper sheet form. Repeat this procedure at all double weld seams.

· if the test of double seam welding fails, inflate the double seam again and search for leaks. Once detected,

repair with a membrane patch to be heat welded over defective area.

· any voids or capillaries must also be rectified with hand held welding gun and 20 mm Silicone roller



Feb.2014, 1st draft


21/43

Physical testing with a vacuum bell:

This test is suitable to check and approve the water tightness of welded seams at cross- and T-junctions of

membrane overlaps and at other details. The following testing equipment is required:

· vacuum bell (Plexiglas, metal frame with rubber-pressure lips, reverse flow valve, manometer gauge, hose

connection)

· vacuum pump

· soap solution

· marking pen (e.g. chalk pen only)

Test procedure:

· apply soap solution over the local seam edge within the area of vacuum bell

· press the vacuum bell over the seam area, treated with soap solution and build-up the vacuum

· visual check of seam under vacuum (bubbling soap solution shows a leak)

· remove the vacuum bell and clean the seam thoroughly with clean rag

· any leaks should be rectified with a hand held welding gun and 20 mm Silicone roller at welding

temperature, alternatively, the area can be sealed with a welded membrane patch

7. CLEANING AND INSPECTION OF COMPLETED WORK

The installed membrane surfaces must be cleaned and inspected before installation of any waterstops, control and

injection ports, hoses, pipes and protection layers that are specified over membrane. This cleaning and inspection

procedure can be performed when one section of the waterproofing is completed, or after completion of the whole

area. Representatives from the waterproofing contractor, the responsible engineer / owners representative and / or

the client must jointly inspect the completed works. The inspection must be recorded in a written document as an

inspection report to be agreed and signed by all parties. The waterproofing contractor must also retain the original

labels including the production batch numbers of all of the membrane rolls delivered and installed membrane on

the project.

8. PROTECTION OF INSTALLED WATERPROOFING MEMBRANE

Preparation works prior to installation of protection layers on the completed waterproofing:

The membrane surface must be clean (free from loose stones, sand, construction waste, etc.), and all of the

specified waterstops and control- and injection pipes (if compartment system is specified) must be completed and

all of the welded seams tested and approved.

Open cut excavation

Procedures for waterproofing under basement slabs:

· loose layout of geotextile 500g/m², min. 100 mm overlapped. Any waterstops for compartments must be

kept unprotected. Use sandbags for temporary ballast of geotextile

· alternatively, use the loose laid Sikaplan® WP protection sheets minimum 80mm overlapped. Waterstops

for compartments shall be kept unprotected. Use sandbags for temporary ballast of protection sheets



Feb.2014, 1st draft


22/43

· loose layout of Polyethylene foil 0.30mm as separation-/gliding layer on geotextile, overlap 100 mm to be

sealed with adhesive tapes prior to application of protective mortar layer (cement min. 300kg/m³,

thickness min. 50 mm, reinforced with wire mesh if required). Any waterstops forming compartments must

be left unprotected and exposed.

At external walls:

· geotextile 500g/m², 100 mm overlapped, suspended from the top and free hanging

· as an alternative, use Sikaplan® WP protection sheets 80mm overlapped, suspended from the top and free

hanging

· erect protective block / brickwork firmly on the waterproofing

· alternatively use sprayed concrete / mortar, thickness min. 50 mm, with light reinforcement mesh if

required, faced with glass fleece, fixed and suspended from the top

On roof slabs below ground:

· loose layout of geotextile 500g/m², min. 100 mm overlapped. Use sandbags for temporary ballast of

geotextile

· as an alternative, use Sikaplan® WP protection sheets, min. 80mm overlapped. Use sandbags for temporary

ballast of protection sheet


sealed with adhesive tapes

· application of protective mortar layer (cement min. 300kg/m³, thickness min.50mm, if necessary use

reinforced wire mesh).

For procedure with piled / diaphragm walls

Below basement slabs:

· loose layout of geotextile 500g/m², min. 100 mm overlapped. Any waterstops forming compartment must

be kept unprotected. Use sandbags for temporary ballast of geotextile

· as an alternative, use Sikaplan® WP protection sheets min. 80mm overlapped. Any waterstops for

compartments must be kept unprotected. Use sandbags for temporary ballast of geotextile



· application of protective mortar layer (cement min. 300kg/m³, thickness min.50mm, if necessary use

reinforced wire mesh). Any waterstops of compartment must be kept unprotected / exposed

At the retaining walls:

· direct placing of concrete on the waterproofing membrane

· formwork for construction-/expansion joints require a soft medium on membrane surface (i.e. plastic hose,

cut-off in longitudinal direction and capped over the formwork edge)

· Reinforcement bars must be held in position with suitable spacers (material compatible to plasticised PVC)

min. 50 mm from the membrane surface

· Provisional layout of non-combustible mineral wool insulation boards to protect the membrane against

sparks from steel welding works

· for special situations or on request, a fine sprayed concrete protective layer can be used , thickness min. 50

mm, reinforced with suspended light mesh and glass fleece (waterstops for compartments must be kept

free).



Feb.2014, 1st draft


23/43

On roof slabs below ground:

· loose layout of geotextile 500g/m², min. 100 mm overlapped. Use sandbags for temporary ballast of

geotextile

· as alternative, loose layout of Sikaplan® WP protection sheets min. 80mm overlapped. Use sandbags for

temporary ballast of protection sheet



· application of protective mortar layer (cement dosage min. 300kg/m³, thickness min. 50 mm, use

reinforced wire mesh if required).



Feb.2014, 1st draft


24/43

9. PROPOSED BILLS OF QUANTITIES

Ref. WATERPROOFING WORKS

Project: ...............................................................................................................................................................

Part /Lot: ...............................................................................................................................................................

Waterproofing system: Waterproofing of structures against external water pressure

Flexible membrane waterproofing system with Sikaplan® WP membranes, loose laid and

linear fixed with, and without compartment system

Waterproofing contractor:.............................................................................................................................................

..............................................................................................................................................

pos. scope of work quantity unit unit price total

1. Installation

Supply and erection of all necessary scaffolding,

machinery and equipment required for the

waterproofing works, including striking and removal

lump sum

1.1. Moving and adjustment/repositioning of scaffolding lump sum

1.2 Movement and repositioning of dewatering pumps lump sum

2. Preparation of substrates

Cleaning and drying the membrane surfaces with

brushes and dust removal with compressed air

(compressed air to be supplied by Main Contractor)

including inspection of substrate

2.1 Horizontal areas

Horizontal and sloped areas less than 15%

m²

2.2 Vertical areas

Vertical and sloped areas above 15%

m²

2.3 Drying of substrate

Drying of substrate with electric warm air dryers or

compressed air or other alternative solutions

m²

2.4 Removal of ponding water, cleaning and drying of

wet areas by wet vacuum and cloths

m²

2.5 Removal of concrete surface laitance in widths of

30cm by blast cleaning or other mechanical

means, including cleaning and drying as required

preparation for the application and adhesion of

Sikadur-31 epoxy adhesives

m’



Feb.2014, 1st draft


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3. Protection layers

Supply and apply protection layers for the

mechanical protection of installed waterproofing

membranes.

Sheet membranes, according to the project

specifications

thickness.....................mm

min. overlap 80 mm

material: homogeneous PVC-p

brand name: Sikaplan®

type: WP…………………

Geotextiles, according to project specifications

unit weight .....................g / my

unit weight .....................g /

my min. overlap 100 mm

material: Polyester/Polypropylene non-woven

fabric, needle punched

brand name……………………

type.......................................

type.........................................

3.1 Horizontal and sloped areas less than 15%, loose laid m²

3.2 Vertical and sloped areas above 15%, spot fixed m²

3.3 Supply and apply of separation / gliding layer,

according to the projects specifications

unit weight .....................g / m²

Thickness ......................mm

min. overlap 100 mm to be sealed with adhesive

tapes

material:……………………..

brand name:.........................

type......................................

m²

3.4 Supply and apply of the protection mortar layer for

horizontal areas (cement > 300kg/m³, thickness 50

mm, steel float finished

m²

3.4.1 Supply and apply of steel reinforcement mesh for

protective mortar layer, ø............/...........mm

m²



Feb.2014, 1st draft


26/43

pos. scope of work quantity Unit unit price total

4. Waterproofing membranes

Single layer membrane waterproofing

Supply and apply of single layer waterproofing

membrane system based on homogeneous

plasticized PVC, according to the project

specification, overlaps min. 80 mm, heat welded

with manual and/or automatic welding machine,

including testing of welded seams as specified,

linear fixed to the substrate at all terminations,

joints, edges and corners

Materials:

Membrane thickness:........mm

Membrane type: brand name: Sikaplan®

type: WP…………...............

Auxiliary products:

Membrane cleaner:

name:………………………..

Fixing elements:

Sikaplan WP Fixation Plate

Aluminium profile, size……..

Metal strips, size……………

Sikaplan WP Disc

Sika Waterbar, type AR…../DR……

Sika Dilatec Tape, type E / ER

4.11 Horizontal and sloped areas less than 15%, loose laid,

overlaps heat welded, excluding fixings

m²

4.12 Vertical and sloped areas above 15%, installed as per

suppliers recommendation, excluding fixings

m²

4.13 Waterproofing of vertical surfaces and channels etc.

in horizontal areas: max. 10m² areas excluding fixings

m²

4.14 Waterproofing of alcoves and niches in vertical areas:

max. 10m² excluding fixings

m²



Feb.2014, 1st draft


27/43


4.2 Double layer waterproofing

Supply and apply of a double layer waterproofing

membrane system based on homogeneous

plasticized PVC, overlaps min. 80 mm heat

welded, linear fixed at all terminations, edges and

corners, and both layers heat welded to form

compartments according to the project

specifications, , including testing of the welded

seams as specified

Materials:

Membrane 1. layer thickness:........mm

Membrane 2. layer thickness:........mm

Membrane type:

Brand name: Sikaplan®

type: WP………….................

Auxiliary products:

Membrane cleaner:

Sika – Trocal Cleaner 2000

Fixing elements:

Sikaplan WP Fixation Plate PVC

Aluminium profile, size……..

4.21 Horizontal and sloped areas less than 15%, loose laid,

overlaps heat welded, excl. fixings

m²

4.22 Vertical and sloped areas above 15%, installed as per

suppliers recommendation, excl. fixings

m²

4.23 Waterproofing of vertical surfaces and channels etc. in

horizontal areas: max. 10m², excl. fixings

m²

4.24 Waterproofing of alcoves and niches in vertical areas:

max. 10m², excl. fixings

m²

5. Fixing of membrane waterproofing

5.1 Supply and mount fixing elements for waterproofing

terminations, to be fixed with stainless steel screws

and dowels (at 150 mm centres) into reinforced

concrete min. 1000 mm above max. groundwater

level, incl. sealing with permanent elastic sealants on

top, or with PVC-p tape, bonded with epoxy

adhesive, suitable for welding to the PVC-p

waterproofing membranes

5.1.1

Aluminium profiles, size 1.5mm x 40 mm, twice

folded (max. length 4000 mm/element), fixed with

screws, ø 4.5mm x 20 mm

m'



Feb.2014, 1st draft


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5.1.2

Rigid PVC plates, size 90mm x 2000mm, fixed with

countersunk screws, ø 4.5mm x 20 mm, incl. heat

welding to the waterproofing membranes

m'

5.1.3 Metal strips – stainless steel, size 4mm x 30 mm

(length 2000mm/element), fixed with countersunk

screws, including overlapping with the waterproofing

membrane and heat welding in position

m'

5.1.4 Supply and apply PVC-p joint sealing tape, bonded

onto prepared concrete surfaces on walls with

epoxy resin adhesive

PVC-p tape,

Brand name: Sika®

Dilatec

type………………………… size………………………….

type of epoxy resin adhesive

…………………………………………………………………….

m’

5.2 Supply and mount fixing elements for the

waterproofing membrane on vertical areas, to be

fixed with stainless steel screws and dowels (at 200

mm centres) into reinforced concrete.

5.2.1 Rigid PVC plates, size 90mm x 2000mm, fixed with



m'

5.2.2 Metal strips, size mm x 30 mm (length 2000 mm

/element), fixed with countersunk screws, incl.

overlapping of waterproofing membrane

m'

5.3. Supply and mount fixing elements for the

waterproofing membranes on vertical corners and

edges, to be fixed with stainless steel screws and

dowels (at 200 mm centres) into reinforced concrete




m'



overlapping of the waterproofing membrane and heat

welding to the strips

m'

5.4 Supply and mount fixing elements for t h e

waterproofing membranes at horizontal corners and

edges, to be fixed with stainless steel screws and

dowels (at 200 mm centres) into reinforced concrete



Feb.2014, 1st draft


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m'



overlapping of the waterproofing membrane and heat

welding onto the strips

m'

5.5 Supply and mount spot fixings for the waterproofing

membrane on vertical areas, u s i n g plasticised

PVC Discs, fixed by nails into shotcrete, or spikes into

predrilled holes in reinforced concrete (horizontal

spacing 2 in each membrane roll width, vertical

spacing, min. every 2.00m)

5.5.1 PVC-p Discs, ø 80mm, fixed with nail gun, incl.

compatible nail and washer

pcs

6. Expansion joint (without compartment system)

6.1 Supply and mount supports for the waterproofing

membrane as a bridge over the joint openings

using stainless steel sheet, size 1.5mm x 200 mm,

fixed one-side with countersunk stainless steel

screws and dowels into the substrate, followed

by loose layout of t h e waterproofing

membrane over formed bridges

Type of metal sheets:..............................

6.1.1 In vertical and sloped areas above 15% m'

6.1.2 In horizontal and sloped areas below 15% m'

7. Compartment system

7.1 Supply and mounting of plasticised PVC-profile as

surface waterstops for construction joints, one side

with flat surface, to be fixed at formwork, resp. heat

welded on installed waterproofing membrane, incl.

heat welding of seams

7.1 Supply and mount plasticised PVC-profiles as surface

waterstops for construction joints, one side with a

flat surface, to be fixed at formwork, or heat welded

on the installed waterproofing membrane, incl. heat

welding of seams, as per the specification

7.1.1 Waterstop type:......................................

width:...............................mm

m'

7.1.2 Cross junction: type:................ prefabricated

size: ..........mm x ............mm

pcs

7.1.3 T-junction: type:………… prefabricated

size: .............mm x .........mm

pcs



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7.1.4 Inner corner junction, horizontal:

type:................ prefabricated

size: ........mm x ..............mm

pcs

7.1.5 Inner corner junction, vertical:

type:............... prefabricated

size: .........mm x ...........mm

pcs

7.1.6 Supply and heat welding of strips (width 20cm) of

t h e waterproofing membrane on both reverse

sides of t h e waterstop

(if direct welding of the waterstop on the membrane

is not possible)

m'


waterstops for expansion joints, one side with flat

surface, to be fixed on the formwork, resp. heat

welded on the installed waterproofing membrane,

incl. heat welding of the seams

7.2.1 Waterstop type:.....................................

width:...............................mm

m'

7.2.2 Cross junction: type:................ prefabricated

size: ..........mm x ............mm

pcs

7.2.3 T-junction:


size: .............mm x .........mm

pcs

7.2.4 Inner corner junction, horizontal:


size: ........mm x ............mm

pcs

7.2.5 Inner corner junction, vertical:


size: .........mm x .............mm

pcs

7.2.6 Welding of the waterproofing membrane strips,

type:............................width 20cm on the flat surface

of the waterstop, prior to mounting it on the surface

(when welding t h e w a t e r s t o p directly on the

membrane is not possible)

m'

7.3 Supply and apply PVC-p joint sealing strips suitable for

welding to the PVC-p waterproofing membrane

bonded with epoxy adhesive on horizontal areas,

where waterstop installation is not possible

7.3.1 PVC-p joint sealing strips, suitable for bonding on

prepared concrete walls with epoxy adhesive,

incl. bonding on the substrate and waterproofing

the intersection with waterstops at wall-roof

junctions.

PVC-p strip, Type Sika®

Dilatec

size………………………….

m’



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7.4 Supply and mount control and injection ports.

Type: Sikaplan WP Flanged Trumpet Ports

In accordance with the PDS and the specification on

the formwork and reinforcement as required, incl.

supply and fixing of control boxes and injection pipes etc.

pcs

7.5 Supply and mount control and injection ports

Type: Sikaplan Control Socket Ports

In accordance with the PDS and the specification on

the formwork and reinforcement as required, incl.

supply and fixing of control tubes and pipes etc.

pcs

8. Penetrations

8.1

Waterproofing around penetrations, cast through

the structure with fixed and pressure flanges based

on stainless steel materials, incl. making sealing

rings on site from the same waterproofing

membrane

steel type:.............................

thickness:........................mm

8.1.1 Well shafts

ø:….................................mm

ø:….................................mm

pcs

pcs

8.1.2 Pipe penetrations

ø:….................................mm

ø:.....................................mm

pcs

pcs

8.1.3 Anchor bolts

ø:……..............................mm

ø:.....................................mm

pcs

pcs

8.1.4 Foundation pile heads

ø………...........................mm

ø………...........................mm

pcs

pcs


waterstops for waterproofing the penetrations of pile

heads, one side with a flat surface fixed on the pile

head formwork, incl. butt welding and heat welding

the waterproofing membranes as specified

8.2.1 Waterstop

type:......................................

width:..............................mm

effective length

m'



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8.2.2 Sealing of foundation pile heads with grout

between the concrete and waterbar, incl. coating

of pile head with epoxy grouting mortar,

type……………

ø………...........................mm

ø………...........................mm

pcs.

pcs.

9. Cleaning and inspection of installed waterproofing

9.1 Cleaning of installed waterproofing by brush and

vacuum

9.1.1 Horizontal and sloped areas less than 15% m²

9.1.2 Vertical and sloped areas above 15% m²

9.2 Inspection of installed waterproofing and welded

seams to check water tightness, incl. repair of any

detected leaks with welded membrane patches

9.2.1 Horizontal and sloped areas

less than 15%

m²

9.2.2 Vertical and sloped areas

above 15%

m²

10. Additional works (single units)

10.1 Waterproofing Contractor’s Personnel

10.1.1 Site Manager / Engineer/ Supervisor h

10.1.2 Skilled waterproofing operative h

10.1.3 Unskilled operative h

10.2 Material

10.2.1 Waterproofing membrane type: Sikaplan® WP……….. m²

10.2.2 Protection layer type:................................. m²

10.2.3 Fixings: rigid PVC plate, type…………………… m’

10.2.4 Fixings: stainless steel strip, type/size…………………… m’

10.2.5 Fixings: PVC-p disc, dia……../ type…………… pcs

10.2.6 Waterstops, type ………………………… m’

10.2.7 Control- and injection flanges, type:………………. pcs

10.2.8 Cleaner, type …………… lt

10.3 Equipment / tools

10.3.1 Electric manual heat welding gun (hand welder and

pressure roller)

h

10.3.2 El. heat welder (automatic) h

10.4.1 El. submersible pump .............l/min. h

10.4.2 Compressor.................l/min. h

10.4.3 El. generating set................V h

10.4.4 El. switch box h

10.4.5 Movable scaffolding h



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10. STANDARD DETAILS

Detail of system build-up and compartment below bottom slab:

1 Substrate as specified

2 Levelling layer: Sikaplan®

W-Felt PP 500 to 1000 g/m2

3 Waterproofing: Sikaplan® WP 1100

4 Protection layer: Sikaplan WP Protection Sheet

5 Compartment with Sika® Waterbar type AR

6 Structural concrete

7 Compacted soil

8 Protective cement screed



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Detail of floor to wall joints, with waterbar




4 Levelling layer: Sikaplan®



6 Retaining-/ diaphragm wall






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Detail of Floor to wall joints with a flat joint (wall sealing in a second phase from the external side)


2 Protection layer: Sikaplan®


3 Heat welding of Sika® Waterbar type AR to Sikaplan

® WP 1100 waterproofing membranes

4 Heat welding of Sikaplan® WP 1100 waterproofing membranes












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Detail of wall compartment joint with Sika Waterbar; Sikaplan waterproofing membrane hot welded onto it

(plan view)

1 Protection with brickwork or reinforced concrete layer







6 Compartment formed with Sika® Waterbar type AR

7 Heat welded



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Detail of control-/ injection pipe for compartment system with flanged trumpet

1 Cover nut, supplied by others

2 Steel pipe with internal threaded hole (approx. ¼’’) supplied by others, length according to wall/slab

thickness, temporarily fixed with wires to the reinforcement bars


4 Clamping rings, hose nipple Ø 18 mm with external threaded hole (approx. 1/4’’) supplied by others

5 Sikaplan® WP Trumpet Flange, spot fixed by heat welding to the waterproofing membrane



W-Felt PP500 to 1000 g/m2







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Detail of well-shaft


2 Rubber sealing ring

3 Cover bolts in blind holes

4 Fixed clamping flange for closing cover, welding watertight

5 Steel pipe







10 Pressure flange ring

11 Clamped flange ring with threaded bolts, ring tight welded to steel pipe

12 Additional membrane layer for clamp sealing in pressure flange

13 Appropriate flat gasket

14 Drain holes

15 Drainage layer

16 Steel anchor



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Detail of Wall flashing; showing the change from water under pressure (X) to percolating water (Y)

1 Sealant: Sikaflex® sealant

2 Metal flashing









10 Retaining-/diaphragm wall

11 Sikaplan® WP Control and Injection Socket PVC, spotfixed by heat welding on the membrane, or Sikaplan

®

WP Trumpet Flange PVC, similarly fixed in place

12 Groundwater level

Y Waterproofing pre-applied

X Waterproofing post-applied



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Detail of typical flashing to pile heads

1 Protection screed / blinding


3 Compacted soil

4 Foundation pile: reinforced concrete







9 Rigid waterproofing layer with Sikadur® – 42 epoxy-resin

10 Waterproofing intersection with PVC-p waterstop: Sika® Waterbar type AR around pile head

11 Heat welding of Sikaplan® WP 1100 waterproofing membranes at Sika

® waterbar




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Detail of pipe penetrations with double clamped flange (for positive pressure waterproofing application)






4 Fixed clamp flange, stainless steel

5 Appropriate flat gasket

6 Loose clamp ring, stainless steel

7 Bolt with locking nut and tapered washer, stainless steel

8 Watertight weld

9 Pipe, stainless steel

10 Prepared piece of waterproofing membrane Sikaplan® WP 1100 with cut hole for bolt penetrations

11 Heat welding




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Detail of watertight wall joints to Sika Waterbar

1 Heat welding








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11 LEGAL NOTE

The information, and, in particular, the recommendations relating to the application and end-use of Sika products,

are given in good faith based on Sika's current knowledge and experience of the products when properly stored,

handled and applied under normal conditions in accordance with Sika’s recommendations. in practice, the

differences in materials, substrates and actual site conditions are such that no warranty in respect of

merchantability or of fitness for a particular purpose, nor any liability arising out of any legal relationship

whatsoever, can be inferred either from this information, or from any written recommendations, or from any other

advice offered. The user of the product must test the products suitability for the intended application and purpose.

Sika reserves the right to change the properties of its products. The proprietary rights of third parties must be

observed. All orders are accepted subject to our current terms of sale and delivery. Users must always refer to the

most recent issue of the local Product Data Sheet for the product concerned, copies of which will be supplied on

request.

Version given by

Hans-Joerg Stich

Phone: 0041-58-436 76 37

Fax: 0041 58 436 78 83

Mail: [email protected]

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