hemelite and topcrete - mkm building supplies · hemelite and topcrete introduction 2 introduction...

Hemelite and Topcretelightweight and dense aggregate blocks

from Tarmac Topblock

Hemelite and Topcrete Introduction

2 www.topblock.co .uk

Introduction 3

Product Selector 4

Hemelite Properties 5

Hemelite Standard 6

Hemelite Paint Quality 7

Hemelite Foundation 8

Hemelite Reveal 9

Hemelite Coursing 10

Topcrete Properties 11

Topcrete Standard 12

Topcrete Paint Quality 13

Topcrete Foundation 14

Topcrete RPW 15

Topcrete Reveal 16

Topcrete Coursing 17

Application 18

Walls below DPC 18

Beam and block floors 18

Internal walls 19

Separating walls 19

External walls 22

Thermal Insulation 23

Design 25

Safe handling 25

Movement control 25

Mortar 25

Wall ties 26

Specification 26

Sitework 27

The UK’s top block solutionTarmac Topblock offers a complete range ofaircrete, dense and lightweight products. As a UKmarket leader, you can expect our blocks to meetthe most demanding of building requirements.

Using Tarmac Topblock you can take advantage of:

ChoiceOffering you a product for every application fromour 4 key brands – Durox, Toplite, Hemelite andTopcrete.

Quality productsContinued investment in our extensive network ofproduction facilities means that you should onlyget the highest quality products.

Customer serviceWe can be relied upon to deliver service, friendlyadvice and partnership.

Reliability We have set a national target for on-time deliveriesand aim to inform you of any likely delays.

Sales supportHelping you with well located sales offices and anexperienced external sales team, serving local,regional and national customers.

Technical supportDedicated technical services, providing you withvital advice on the suitability of Tarmac Topblockproducts.

InnovationContinuously developing our range of innovativeproducts and services, to respond to your needs.

ResponsibilityTaking our corporate responsibility seriously, bysharing best practice in safety, health andenvironment for all.

Part of the Tarmac GroupTarmac can provide you with a range of productsfor virtually every construction purpose.

Strong/high loadbearingThe range of strengths availablein Hemelite and Topcrete blockscaters for the requirements ofgeneral housing and otherbuildings.

Fire resistantThe non-combustible propertiesof Hemelite and Topcrete blocksmean most constructions willsurpass the requirements of theBuilding Regulations.

Sound insulationHemelite and Topcrete blockspossess excellent soundinsulation properties that complywith Robust Detail specificationsand the Building Regulations.

Surface finishesHemelite and Topcrete blocksoffer an ideal background fordrylining, plaster, rendering and fixings.

Thermal performanceInherent thermal mass ofHemelite and Topcrete blocksacts as a heat store, which helpscontrol internal temperatureand prevents overheating.

RecyclableHemelite and Topcrete blocksare recyclable.

TraditionalHemelite and Topcrete blocksprovide a risk free, proven andfamiliar building method.

AvailabilityHemelite and Topcrete blocksare widely and readily available.

Cost-effectiveHemelite and Topcrete blocks offer a cost-effectivebuilding method.

Hemelite and Topcrete Introduction

3 National Sales Helpline: 0845 606 2468

Hemelite and TopcreteContinuous product

development has led to an

extensive range of Hemelite

lightweight and Topcrete dense

aggregate blocks, which are

supplied from a network of

production units located

throughout the country.

Hemelite lightweight aggregate

blocks are suitable for use in

walls above and below ground

and in block and beam floors.

They have a proven high level of

technical performance.

Topcrete dense aggregate blocks

are extremely durable and robust

and have excellent loadbearing

and sound insulation properties.

Recent developments have seen

the introduction of Multicore

and Midi blocks as well as RPW

party wall blocks. These products

have been designed to make

them convenient to handle on

site, whilst retaining their

excellent technical properties.

The benefits of ease of handling

will assist contractors and

specifiers in meeting the

obligations of the Construction

(Design and Management)

Regulations.

Both Hemelite and Topcrete are

produced in solid, hollow or

cellular units and are available in

Standard texture and close

textured Paint Quality grades.

AuthorityHemelite and Topcrete products

are BSI Kitemarked to BS EN

771-3 and are manufactured

under a Quality System

complying with BS EN ISO 9001.

They conform to the ‘Special

Category of Manufacturing

Control’ requirements specified

in BS 5628-1.

EnvironmentalAll Topblock manufacturing

plants operate an environmental

management system conforming

to ISO:14001. All sites are

independently assessed for

compliance by BSI.

Appearance Standard grade blocks are light

to dark grey and have a textured

surface suitable for plastering

or rendering.

Paint Quality grade blocks are

light to dark grey and have a

close textured surface. The

colour and texture of blocks may

differ according to factory of

origin. Samples are available

on request.

Working withHemelite and TopcreteTopblock aggregate blocks have

excellent working characteristics.

They are straightforward to

install following conventional

block laying practice. Hemelite

and Topcrete blocks provide a

strong background for the

application of wet and dry

finishes as well as a good

substrate into which to

secure fixings.

BS EN 771-3

Hemelite aggregate blocks

Topcrete aggregate blocks

Certificate No. 69579

Technical Services: 0870 242 1489

Hemelite and Topcrete Product selector

4

WallsApplication

Walls above and below ground Hemelite and Hemelite and including separating walls Topcrete Standard Topcrete Coursing (ideal for finishing with render brickscladding, plaster or drylining)

Commercial and leisure buildings Hemelite and Topcrete(that require direct decoration) Paint Quality

Closing of cavities Hemelite and Topcrete Reveal

Solid masonry separating walls in Topcrete RPWresidential buildings such as hotels and student accommodation

FoundationsApplication

Solid walls below dpc Hemelite Topcrete Foundation Foundation

FloorsApplication

Beam and block floors Hemelite andTopcrete Standard

140mm

290mm,300mm255mm 275mm

140mm

300mm

65mm Cavity return

215mmhigh

Half length

Full length

215mm

440mm

65mm

215mm

100mm

440mm

290mm

140mm

Hemelite Properties

www.topblock.co .uk5

Material propertiesStandard Paint Quality

Compressive strength to BS EN 771-3 (N/mm2)Solid blocks 3.6, 7.3 & 10.4* 3.6, 7.3 & 10.4*

Cellular and hollow blocks 3.6 3.6 & 7.3*

Equivalent compressive strength to BS 6073 (N/mm2) (superseded by BS EN 771-3)Solid blocks 3.5, 7.0 & 10.0* 3.5, 7.0 & 10.0*

Cellular and hollow blocks 3.5 3.5 & 7.0*

Material dry density (kg/m3)Solid, cellular or hollow 3.6 N/mm2 1360 1400

Solid 7.3 N/mm2 1450 1400

Solid 10.4 N/mm2 1520 1500

Solid Ultra 3.6 & 7.3 N/mm2 - 1050

Thermal conductivity (W/mK) @ 3% moisture contentSolid, cellular or hollow 3.6 N/mm2 0.45 0.46

Solid 7.3 N/mm2 0.47 0.46

Solid 10.4 N/mm2 0.49 0.48

Solid Ultra 3.6 N/mm2 and 7.3 N/mm2 - 0.38

Moisture movement (mm/m) (shrinkage & expansion)< 0.80 < 0.80

Typical airtightness (m3/[h.m2] @ 50 Pa)100mm solid blocks – emulsion paint finish - 0.12 - 0.57

140mm solid blocks – emulsion paint finish - 0.01 - 0.63

Note *Manufactured to order

Hemelite Standard blocksFor general use in walls above

and below ground and in beam

and block floors. They are ideal

for finishing with render,

cladding, plaster or drylining.

Hemelite Paint Quality blocksClose textured blocks ideally

suited for walls in commercial

and leisure buildings which are

to receive direct decoration. The




on request.

National Sales Helpline: 0845 606 24686

Hemelite Standard

Performance summary

Fire resistance, no finish (hrs) Sound reduction, (Rw dB) Block thermal resistance (m2K/W)

Single leaf wall Non- Loadbearing Lightweight Drylining 3.6N/mm2 7.3N/mm2 10.4N/mm2

loadbearing plaster

75mm solid 2 - 45 43 0.17 - -

90mm solid 2 1 45 45 0.20 0.19 -

100mm solid 2 2 46 46 0.22 0.21 0.20

140mm solid 4 3 48 48 0.31 0.30 0.29

150mm solid 6 4 49 49 0.33 0.32 0.31

190mm solid 6 6 52 52 0.42 0.40 0.39

200mm solid 6 6 52 52 0.44 0.43 0.41

215mm solid 6 6 53 53 0.48 0.46 0.44

100mm cellular 2 2 44 46 0.28 - -

140mm cellular 3 2 48 47 0.33 - -or hollow

190mm cellular 4 2 52 51 0.52* - -

Notes The values for fire resistance and sound insulation apply to Hemelite blocks of any strength

Fire resistance – the application of plaster or drylining finishes will generally increase the period of fire resistance

Sound reduction – finishes to both wall faces are assumed. Values are based on technical assessment and tests to BS EN 140

* Based on 4 core block design

Notes Unit weights, which are given for design purposes, areapproximate only and based on 3% moisture content

Tolerance to BS EN 771-3, Tolerance Category D1

Face size 440 x 215mmBlock width (mm)

75 90 100 140 150 190 200 215

Solid: 3.6N/mm2

9.9 11.8 13.1 18.4 19.7 25.0 26.3 28.3

Solid: 7.3N/mm2

- 12.6 14.0 19.6 21.0 26.6 28.0 30.1

Solid: 10.4N/mm2

- - 14.7 20.5 22.0 27.8 29.3 31.5

Cellular: 3.6N/mm2

- - 11.0 15.0 - 19.0 - -

Hollow: 3.6N/mm2

- - - 15.0 - 19.0 - -Note Laid weights are approximate and taken at

3% moisture content

Face size 440 x 215mm

Block width (mm)75 90 100 140 150 190 200 215

Solid: 3.6N/mm2

106 127 142 198 212 268 282 304

Solid: 7.3N/mm2

- 135 150 210 225 285 300 323

Solid: 10.4N/mm2

- - 157 219 235 297 313 337

Cellular: 3.6N/mm2

- - 121 165 - 210 - -

Hollow: 3.6N/mm2

- - - 159 - 202 - -

Sizes and unit weights (kg) Laid weights (kg/m2)


Hemelite Paint Quality


Tolerance to BS EN 771-3, Tolerance Category D1


90 100 140 150 190 200 215

Solid: 3.6, 7.3N/mm2

12.2 13.5 18.9 20.3 25.7 27.0 29.1

Solid Ultra: 3.6, 7.3N/mm2

- - - - 19.5 - -

Solid: 10.4N/mm2

- 14.5 20.2 21.7 27.5 28.9 31.1

Cellular: 3.6, 7.3N/mm2

- - - - 19.0 - -Note Laid weights are approximate and taken at

3% moisture content


90 100 140 150 190 200 215

Solid: 3.6, 7.3N/mm2

131 145 203 218 276 290 312

Solid Ultra: 3.6, 7.3N/mm2

- - - - 215 - -

Solid: 10.4N/mm2

- 155 217 232 294 309 333


- - - - 210 - -


Performance summary


Single leaf wall Non- Loadbearing Painted 3.6N/mm2 10.4N/mm2

loadbearing finish only 7.3N/mm2

90mm solid 2 1 44 0.20 -

100mm solid 2 2 46 0.22 0.21

140mm solid 4 3 48 0.30 0.29

150mm solid 6 4 49 0.33 0.31

190mm solid 6 6 52 0.41 0.40

190mm solid ultra 6 6 48 0.50 -

200mm solid 6 6 52 0.43 0.42

215mm solid 6 6 53 0.47 0.45

190mm cellular 4 2 51 0.50* -Notes The values for fire resistance and sound insulation apply to Hemelite blocks of any strength

Fire resistance – the application of plaster or drylining finishes will generally increase the period of fire resistance

Sound reduction – values are based on technical assessment and tests to BS EN 140

* Based on 4 core block design


Hemelite Foundation

Hemelite FoundationFoundation is produced

specifically for use below DPC in

solid walls. It replaces the inner

and outer leaf, wall ties and

concrete cavity fill associated

with traditional construction

methods. This means that

construction time may be halved

compared to cavity walling and

that the wall becomes stable

soon after laying, eliminating the

risk of collapsed cavities.

They are formed with recessed

grooves in each short edge to

facilitate lifting and are available

in sizes of 255 x 290 x 140mm or

255 x 300 x 140mm.

ApplicationFoundation blocks can be

used to support cavity walls of

250mm – 300mm above DPC, or

solid walling of equivalent size.

Foundation blocks may be laid

with either 255mm or 290,

300mm as the wall width.

255mm

140mm

290mm or 300mm(depending on thefactory of origin)

Hemelite Foundation blocksbelow DPC

HemeliteFoundationblock

290mm or300mm

Cut blocks

290mm or 300mm wall

255mm

Cut blocks

Filledjoints

255mm wall

Corner bonding of Hemelite Foundation walls

QuantitiesFor estimating purposes the following number of blocks are required

per m2 of laid wall, based on 10mm mortar joints:

255mm width – 22.2 blocks

290mm width – 25 blocks

300mm width – 25 blocks

Block size 255 x 290 x 140mm

Compressive strength to BS EN 771-3 (N/mm2) 7.3

Equivalent compressive strength to BS 6073 (N/mm2) 7.0

Material dry density (kg/m3) 1400

Thermal conductivity (W/mK) 0.51

Unit weight (kg) 15.0

Laid weight (kg/m2) 255mm width 380

Laid weight (kg/m2) 290mm, 300mm width 420/434

Material properties and weights

Note Unit and laid weights are approximate and taken at 3% moisture content


Hemelite Reveal

Hemelite Reveal blocksL-shaped blocks close the cavity

at openings and eliminate

cutting and wastage of full sized

blocks. They maintain a strong

masonry bond as well as

providing a good bearing for

beams and lintels. The Reveal

block return dimension is 65mm:

an allowance should be made for

the DPC and any insulation

required to limit thermal

bridging.

Block width (mm) 100 x 65

x cavity return (mm)

Full length 440mm: unit weights (kg)3.6N/mm2 15.0

7.3N/mm2 16.1

Half length 215mm: unit weights (kg) 3.6N/mm2 8.4

7.3N/mm2 8.9

Sizes and weights

Full and half length Reveal blocks(purchased as a pair)

100mm

Cavityreturn65mm

215mm high

Half length

Full length

Brickworkouter leaf

HemeliteReveal block

DPC

Insulation

Typical application

Compressive strength to BS EN 771-3 (N/mm2).


Hemelite Coursing

Hemelite Coursing bricksCoursing bricks are designed

for use with the range of

Hemelite blocks.

ApplicationCoursing bricks should be used

for general coursing work,

in-filling small areas of wall such

as between timber floor or roof

members as well as closing

cavities at eaves, reveals and sills.

Their use can eliminate cutting

and wastage.

Typical application

Brick size 215 x 100 x 65mm

Compressive strength to BS EN 771-3 (N/mm2) 3.6, 7.3

Equivalent compressive strength to BS 6073 (N/mm2) 3.5, 7.0

Nominal dry density (kg/m3) 1400



Note Unit weight is approximate and taken at 3% moisture content

65mm

215mm100mm


Topcrete Properties

Material properties

Standard Paint Quality

Compressive strength to BS EN 771-3 (N/mm2)Solid blocks 7.3, 10.4, 17.5 & 22.5 7.3 & 10.4

Cellular and hollow blocks 3.6, 7.3 & 10.4* 3.6, 7.3 & 10.4*

Equivalent compressive strength to BS 6073 (N/mm2) (superseded by BS EN 771-3)Solid blocks 7.0, 10.0, 15.0 and 20.0 7.0 &10.0

Cellular and hollow blocks 3.5, 7.0 and 10.0* 3.5, 7.0 & 10.0*

Material dry density (kg/m3)1900 - 2000 1800 - 1900

Thermal conductivity (W/mK @ 3%) moisture content 1.28 1.18

Moisture movement (mm/m) (shrinkage & expansion)< 0.5 < 0.5

Typical airtightness (m3 [h.m2] @ 50 Pa)100mm solid blocks – emulsion paint finish - 0.13 - 1.16

140mm solid blocks – emulsion paint finish - 0.36

Note *Manufactured to order

Topcrete Standard blocksFor general use in walls above

and below ground and in beam

and block floors. They offer high

loadbearing potential, excellent

sound insulation and are extremely

robust and durable. They are

ideal for finishing with render,

cladding, plaster or drylining.

Topcrete Paint Quality blocksClose textured blocks ideally

suited for walls in commercial

and leisure buildings which are

to receive direct decoration. The




on request.


Topcrete Standard

12

Face size 440 x 215mm (Midi 290 x 215mm)Block width (mm)

75 90 100 140 150 190 215

Solid: 7.3, 10.4, 17.5, 22.5N/mm2

14.0 17.0 18.5 26.0 28.0 35.0 40.0

Solid Midi: 7.3, 10.4, 17.5, 22.5N/mm2

- - - 17.3 - - -


- - 14.5 18.4 - - -

Cellular Multicore: 3.6, 7.3N/mm2

- - - 18.5 - - -

Hollow: 3.6, 7.3N/mm2

- - - 17.0 - - 27.0

Face size 440 x 215mm (Midi 290 x 215mm)Block width (mm)

75 90 100 140 150 190 215

Solid: 7.3, 10.4, 17.5, 22.5N/mm2

148 177 198 275 295 374 423

Solid Midi: 7.3, 10.4, 17.5, 22.5N/mm2

- - - 276 - - -


- - 155 194 - - -


- - - 199 - - -


- - - 180 - - 285

Note Laid weights are approximate and taken at 3% moisture content



Tolerance to BS EN 771-3, Tolerance Category D1.

Performance summary

Notes The values for fire resistance and sound insulation apply to Topcrete blocks of any strengthFire resistance – figures in brackets denote blocks manufactured using limestone. These are available from a number of factories andshould be specified where their use is essential in meeting the required fire resistance. The application of plaster or drylining finisheswill generally increase the period of fire resistanceSound reduction – finishes to both wall faces are assumed. Values are based on technical assessment and tests to BS EN 140


Single leaf wall Non- Loadbearing Lightweight Drylining 3.6, 7.3, 10.4N/mm2

loadbearing plaster

75mm solid 1 (2) - 47 46 0.06

90mm solid 11/2 (2) 1 48 47 0.07

100mm solid 2 2 50 49 0.08

140mm solid/ 3 (4) 2 (3) 53 52 0.11solid Midi

150mm solid 4 (6) 2 (6) 53 52 0.12

190mm solid 4 (6) 2 (6) 54 54 0.15

215mm solid 6 2 (6) 56 54 0.17

100mm cellular 2 2 46 46 0.12

140mm cellular or 3 3 51 51 0.17

hollow inc.

cellular Multicore

215mm hollow 6 (2) 53 53 0.22

Topcrete Paint Quality


Face size 440 x 215mm (Midi 290 x 215mm) Block width (mm)

90 100 140 150 190 215

Solid: 7.3, 10.4N/mm2

16.0 17.8 24.9 26.7 33.8 38.2

Solid Midi: 7.3, 10.4Nmm2

- - 16.4 - - -


- - 18.0 - - -


- - 18.5 - - -


- - 18.0 - - -

Face size 440 x 215mm (Midi 290 x 215mm) Block width (mm)

90 100 140 150 190 215

Solid: 7.3, 10.4N/mm2

168 187 262 281 356 403

Solid Midi: 7.3, 10.4N/mm2

- - 262 - - -


- - 197 - - -


- - 199 - - -


- - 197 - - -

Note Laid weights are approximate and taken at3% moisture content



Tolerance to BS EN 771-3, Tolerance Category D1.

Performance summary

Notes The values for fire resistance and sound insulation apply to Topcrete blocks of any strength

Fire resistance – figures in brackets denote blocks manufactured using limestone. These are available from a number of factories andshould be specified where their use is essential in meeting the required fire resistance. The application of plaster or drylining finisheswill generally increase the period of fire resistance

Sound reduction – values are based on technical assessment and tests to BS EN 140


Single leaf wall Non- Loadbearing Painted 3.6, 7.3, 10.4N/mm2

loadbearing finish only

90mm solid 11/2 (2) 1 46 0.08

100mm solid 2 2 48 0.08

140mm solid/ 3 (4) 2 (3) 51 0.12

solid Midi

150mm solid 4 (6) 2 (6) 52 0.13

190mm solid 4 (6) 2 (6) 53 0.16

215mm solid 6 2 (6) 55 0.18

140mm cellular or 3 2 51 0.18

hollow inc.

cellular Multicore


Topcrete Foundation

Topcrete Foundation Foundation blocks are produced

specifically for use below DPC in

solid walls. They replace the

inner and outer leaf, wall ties

and concrete cavity fill associated

with traditional construction

methods. This means that

construction time may be halved

compared to cavity walling and

that the wall becomes stable

soon after laying, eliminating the

risk of collapsed cavities.

They are formed with recessed

grooves in each short edge to

facilitate lifting and measure

275 x 300 x 140mm.

ApplicationFoundation blocks can be used to

support cavity walls (250mm –

300mm) above DPC, or solid

walling of equivalent size.

Foundation blocks may be laid

with either 275mm or 300mm as

the wall width.

QuantitiesFor estimating purposes the

following numbers of blocks are

required per m2 of laid wall,

based on 10mm mortar joints:




Compressive strength to BS EN 771-3 (N/mm2) 7.3

Equivalent compressive strength to BS 6073 (N/mm2) 7.0

Material dry density (kg/m3) 1600







275mm

140mm

300mm

300mm

Cut blocks

300mm wall

275mm

Cut blocks

Filledjoints

275mm wall

Corner bonding of Topcrete Foundation walls

Topcrete Foundation blocksbelow DPC

TopcreteFoundationblock


Topcrete RPW

Topcrete RPW RPW (Residential Party Wall)

blocks are designed for the

construction of solid masonry

separating walls in residential

buildings such as hotels and

student accommodation.

They offer an alternative ‘slim

line solution’ to established sizes

of cavity and solid separating walls.

SizeRPW blocks are 290mm long x

190mm width x 140mm high.

They should be used to construct

a 190mm thick wall.

ApplicationRPW blocks are intended for the

construction of separating walls

in residential buildings. Subject

to adequate flanking conditions

and good standards of

workmanship (see the Topblock

Design Guide), the walls are

capable of meeting the specified

performance standard of

43 DnT,w+Ctr dB, with a plaster or

drylined finish.

The performance of RPW has

been evaluated based on tests to

BS EN ISO 140-3 and BS EN ISO

717-1. Walls can be finished with

13mm dense or lightweight

plaster, or 12.5mm plasterboard

on dabs. It is essential that good

standards of workmanship are

maintained, particularly the full

filling of all mortar joints, to

enable the acoustic potential of

the separating wall to be realised.

QuantitiesFor estimating purposes the

following number of blocks are

required per m2 of laid wall,

based on 10mm mortar joints:

190mm width – 22.2 blocks.

InstallationThe design and construction of

walls should be in accordance

with BS 5628-1&3.


Equivalent strength to BS EN 771-3 (N/mm2) 7.3

Average compressive strength to BS 6073 (N/mm2) 7.0

Material dry density (kg/m3) 1900 - 2000






Example of Bonded ‘T’ Junction

190mm 290mm

140mm

Separating wall

190m

m

290mm

First, third, fifth course etc

Corridor wallCorridor wall

Cut block

Cut block

190m

m

290mm 240mm

Second, fourth, sixth course etc

Separating wall


Topcrete Reveal

Topcrete Reveal blocksL-shaped blocks close the cavity

at openings and eliminate

cutting and wastage of full sized

blocks. They maintain a strong

masonry bond as well as

providing a good bearing for

beams and lintels. The Reveal

block return dimension should

be specified, allowing for the

width of DPC and any insulation

required to limit thermal

bridging. Notes * Reveal blocks can be produced in higher strengths if required

Compressive strength to BS EN 771-3 (N/mm2)

Block width (mm) 100 x 65

x cavity return (mm)

Full length 440mm: unit weights (kg)7.3N/mm2* 20.9

Half length 215mm: unit weights (kg) 7.3N/mm2* 11.6

Sizes and weights

Full and half length Reveal blocks(purchased as a pair)

100mm

215mm high

Half length

Full length

Brickworkouter leaf

TopcreteReveal block

DPC

Insulation

Typical application

Cavityreturn65mm


Topcrete Coursing

Topcrete Coursing bricksCoursing bricks are designed

for use with the range of

Topcrete blocks.

ApplicationCoursing bricks should be used

for general coursing work,

infilling small areas of wall such

as between timber floor or roof

members as well as closing

cavities at eaves, reveals and sills.

Their use can eliminate cutting

and wastage of full sized blocks.

Typical application

Brick size 215 x 100 x 65mm

Compressive strength to BS EN 771-3 (N/mm2) 7.3, 10.4 & 22.5

Equivalent compressive strength to BS 6073 (N/mm2) 7.0, 10.0, 20.0

Material dry density (kg/m3) 1900 - 2000



Note Unit weight is approximate and taken at 3% moisture content

65mm

215mm100mm

Beam and block floorsHemelite or Topcrete Standard


suspended floors in conjunction

with precast concrete beams.

They are quick to install and

provide effective sound

insulation for internal floors.

Hemelite or Topcrete Standard


beam and block suspended

ground and internal floors in

single occupancy dwellings under

domestic loading. Where high

point loadings are anticipated,

such as in garages, a reinforced

structural topping must be used.

Where floor loadings dictate

closer beam spacing, blocks

should be used spanning their

215mm direction.

Coursing bricks to in-fill between

beam-ends are available in

65mm bedding height.


Hemelite and Topcrete Application

Walls below DPCHemelite and Topcrete Standard

blocks are suitable to construct

internal and external walls below

ground. For the outer leaf of

external cavity walls, or solid

external walls below ground, any

Topcrete product can be used, or

Hemelite Standard blocks of

7.3N/mm2 strength. However for

protected locations, such as the

inner leaf of a cavity wall or

internal walls, Hemelite Standard

3.6N/mm2 solid or cellular blocks

may be used.

These products are suitable for

use in sulfate soil conditions

Class DS-1 to DS-3, as defined in

BRE Special Digest No. 1 and

shown in the table, and their use

is supported by research

conducted by the Concrete Block

Association.

Sulfate soil conditionsHemelite or Topcrete aggregate blocks

DS-1 DS-2 DS-3

Hemelite Foundation 3.6N/mm2 ✓

Hemelite Standard* 7.3N/mm2 or ✓ ✓ ✓

Foundation block

Topcrete Standard - any strength or ✓ ✓ ✓

Foundation block

Note * Hemelite Standard 3.6N/mm2 solid or cellular blocks are suitable for use as theinner leaf of cavity walls and internal walls below dpc

Hemelite orTopcreteStandard

Hemelite and Topcrete blocks below DPC

Hemelite orTopcreteFoundationblock

Block specification

440 x 100 x 215mm Hemelite Standard - either 3.6N/mm2 or 7.3N/mm2

strength solid blocks may be used but when 3.6N/mm2 are required

they should be specified as ‘flooring grade’

OR 440 x 100 x 215mm Topcrete Standard - 7.3N/mm2 strength solid

blocks may be used.

Beam and blockfloors (continued)For the suitability of cellular

blocks contact Technical Services.

When tested under transverse

load the blocks are designed to

support a point load of 3.5kN

over a 420mm clear span.

The requirements of Building

Regulation E2 ‘Protection

against sound within a dwelling-

house’ can be easily met using a

beam and block internal floor

using Hemelite or Topcrete infill

blocks, finished with a minimum

50mm sand and cement screed

and plasterboard ceiling.

Independent tests confirm that

the airborne sound reduction

(RW) of these floor constructions

finished was 51 Rw dB. This

exceeds the minimum required

value of 40 Rw dB.

Internal wallsHemelite and Topcrete can be

used for the construction of

internal walls.

For partitions in dwellings these

products can be used to provide

good levels of airborne sound

insulation as well as a suitable

background for finishes and

for fixings.

For commercial and industrial

applications these products may

be used to provide sound

insulation, fire resistance and

resistance to impact damage.

Paint Quality grade blocks are

suitable for direct decoration.

For internal walls

that are required to

provide sound

insulation between

bedrooms,

or a room containing

a water closet and

other rooms, to

satisfy Building

Regulation E2,

constructions are shown on

page 21. These are based on the

guidance given in Approved

Document E or have been tested

to confirm that they will provide

the minimum sound insulation of

40 Rw dB required by Building

Regulation E2.

Separating wallsThe Building Regulations require

separating walls to provide

reasonable resistance to sound

transmission.

Guidance on suitable Hemelite

and Topcrete constructions

capable of meeting the specified

performance is shown on pages

21 and 22. This includes

constructions that can be built to

satisfy Robust Details E-WM-1, 2,

3, 4 & 8. The use of Robust

Details provides an alternative to

pre-completion testing for

demonstrating compliance with

Part E for new build dwellings.

Robust Details should be used in

accordance with the scheme

requirements including plot

registration.

The performance of separating

walls is highly dependent on

design, detailing and the good

workmanship of the associated

flanking construction.



ScreedConcrete floor beam

Hemelite or Topcreteflooring block

Typical beam and block internal floor

PlasterboardTimber battens

Residential buildings RPW (Residential Party Wall)

blocks are designed for the

construction of solid masonry

separating walls in residential

buildings such as hotels and

student accommodation.

The performance of RPW has been

evaluated based on tests to BS EN

ISO 140-3 and BS EN ISO 717-1.

Walls can be finished with 13mm

dense or lightweight plaster, or

12.5mm plasterboard on dabs. It is

essential that good standards of

workmanship are maintained,

particularly the full filling of all

mortar joints, to enable the

acoustic potential of the

separating wall to be realised.



New Dwellings – Robust DetailsConstruction Methods of compliance RD ref Recommended solutionelements

Separating walls Robust Details E-WM-1

Pre-completion testing or

not required E-WM-2

E-WM-3

or

E-WM-4

or

E-WM-8*

75mm min cavity

13mm plaster (10kg/m2 min)

75mm min cavity

Drylining (8kg/m2 min)

Nominal 8mmparging

• 2 x 100mm Topcrete Standard E-WM-3 • 2 x 100mm Hemelite Standard E-WM-4

Notes Hemelite and Topcrete separating wall types should be used where there is a separating floor All Hemelite and Topcrete should be specified as solid blocks

* This Robust Detail applies to Hemelite cavity separating walls only; it includes a 35mm Isowool Hi-Therm RD35 foil-face mineral wool acoustic batt and the parging can be omitted.

RD - no site

testing

required

• 2 x 100mm Topcrete Standard E-WM-1• 2 x 100mm Hemelite Standard E-WM-2

Junction details for use with Topcrete RPW

Outer skin of masonry

Typical junction with external wall Typical junction withpartition wall

Movement joint

Joint carried throughplaster finish

Suitable tiesacross movementjoint, at 450mmvertical centres

Suitable tiesacross movementjoint, at 450mmvertical centres

Internal partitionblock 215mm high

Topcrete RPW

Topcrete RPW



www.topblock.co .uk

New Dwellings – Pre-completion testingConstruction Methods of compliance Recommended solutionelements

Separating walls Constructions requiring pre-completion

testing in accordance with Approved

Document E or other technical guidance

215mm min


• 215mm Topcrete Standard(100mm blocks laid flat)


• 2 x 100mm Topcrete Standard


• 2 x 100mm Hemelite Standard

Site testing

required

Notes Hemelite and Topcrete separating wall types should be used where there is a separating floor All Hemelite and Topcrete should be specified as solid blocks Where there is a step or stagger of at least 300mm in the Hemelite separating wall, a drylined finish may be used

75mm min cavity

50mm min cavity

New Build Dwellings and ExtensionsConstruction Methods of compliance Recommended solutionelements

Internal Walls Approved Document ‘E’

prescriptive solutions or

Topblock constructions

which have been shown

by testing to meet the

regulations

Internal Floors Approved Document ‘E’

prescriptive solutions or

Topblock constructions

which have been shown

by testing to meet the

regulations

• 100mm Hemelite Standard• 75mm Topcrete Standard

Plaster or drylining

50mm min sand/cement screed

Any ceiling finish No site

test

ing

require

d

Solid infill blocks comprising• 100mm Hemelite Standard*• 100mm Topcrete Standard

* 3.6 or 7.3 N/mm2 Hemelite blocks may be used, but the 3.6 N/mm2 blocks should be specified as “flooring grade”.

External walls In cavity walls, Hemelite or

Topcrete may be used for either

or both leaves, normally with a

minimum width of 90mm. When

used for the outer leaf, the

blockwork should normally be

rendered or clad. When the

cavity is not to be fully filled

with insulation, a clear cavity of

50mm minimum width should be

maintained, excluding the width

of any insulation.

In a single leaf wall the minimum

width of blockwork, with or

without rendering, may be

selected from BS 5628-3.



New Build Rooms for Residential Purposes*Any of the recommended solutions shown for the New Build Dwellings (on pages 20 & 21) can be specified forseparating walls for use in rooms for residential purpose. In addition the solutions shown below may be used:

Construction Methods of compliance Recommended solutionelements

Separating Walls Constructions requiring

pre-completion testing in

accordance with Approved

Document E or other

technical guidance

e.g. BBA certification or

field test data

215mm Topcrete (100mm blocks laid flat)

Note *Rooms for residential purposes include hotels, hostels, boarding houses, halls of residence and residential houses but exclude hospitals orsimilar establishments used for patient accommodation

13mm plaster or drylining (10kg/m2 min)

190mm Topcrete RPW

13mm plaster or drylining (10kg/m2 min)

Site

test

ing

require

d

215mm

190mm

140mm



Thermal insulationSome typical construction

solutions to comply with Building

Regulation Part L, Conservation

of Heat and Power, are shown on

page 24. As insulation material

sizes and their thermal

conductivity are subject to

change, it is recommended that

the U-value of constructions be

periodically confirmed by

reference to Technical Services or

the Topblock website.

From April 2006, Approved

Document L1A (new dwellings)

of the Building Regulations was

introduced so that compliance is

demonstrated by showing that

the Dwelling emission rate (DER)

is no greater than the Target

emission rate (TER) of a notional

building of the same size as the

proposed house. The TER is

calculated using standard

defaults for the fabric insulation

and the heating and hot water

systems that are embedded

within the SAP 2005 software,

resulting in a 20% reduction in

CO2 emissions compared to the

previous requirements.

The actual level of fabric

insulation required will be

dependent upon a number of

factors including the fuel type

used and the efficiency of the

heating system. The diagram

above shows typical U-values for

the exposed elements of the

building, assuming that the fuel

type is mains gas, which could

form the starting point for the

DER calculation.

Approved Document L1B

covers the standard of

insulation required when

building work is carried out on

an existing dwelling. When

constructing an extension to a

dwelling, minimum elemental

U-values apply as shown in the

table below.

Elemental U-values for extensions to existing dwellings

Element Dwellings U-value (W/m2K)

Walls 0.30

Floor 0.22

Roof insulation at ceiling level 0.16

Roof insulation at rafter level 0.20

Roofs (flat) 0.25

Windows, roof windows & rooflights 1.80

Doors with more than 50% of internal face glazed 2.20

Other doors 3.00

Typical U-values

Roof with ceilingU-value = 0.14 W/m2K

Roof window or rooflightsU-value = 1.8 W/m2K

Exposed wallsU-value = 0.30 W/m2K

Sloping or flat roofU-value = 0.14 W/m2K

Windows and doorsU-value = 1.8 W/m2K

Gas boiler with aminimum SedbukOf 86%

Ground floorU-value = 0.20 W/m2K



Note Resistance of low–e cavity 0.64 m2K/W

Internal finish U-value of 100mm inner leaf (W/m2K)

Hemelite Standard Topcrete Standard

13mm Dense plaster 0.30 0.31

13mm Lightweight plaster 0.29 0.31

9.5mm Plasterboard on dabs 0.29 0.30


Insulation

55mm Kingspan TW50(k = 0.023 W/mK)with low-e cavity*

U-values using full fill insulation







Insulation

100mm Dritherm 32(k = 0.032 W/mK)







Insulation

100mm Springvale Ecobead Platinum(k = 0.033 W/mK)

U-values using partial fill insulation

Note Resistance of low–e cavity 0.644 m2K/W







Insulation

50mm Kingspan TW50(k = 0.023 W/mK)with low-e cavity*


Thermal laminate Hemelite Standard Topcrete Standard

50mm Thermalcheck K (2.27 m2K/W) 0.32 0.34

60mm ThermaLine Super (2.32 m2K/W) 0.31 0.32

65mm ThermaLine Super (2.55 m2K/W) 0.29 0.30

U-values using clear cavity with thermal laminates

Safe handlingRepetitive one-person handling

of blocks can pose a risk of

injury. Health and Safety

Executive Construction Sheet 37

advises that in such cases blocks

should not exceed 20kg. Some

constructions may require the

use of heavier units and

appropriate handling methods

should be adopted. Maintaining

blocks within the 20kg guideline

can be achieved in a number of

ways. For example, cellular or

hollow blocks can often be

specified without compromising

performance.

Wall widths of 190mm and

215mm can be achieved by

laying 2 x 90mm or 2 x 100mm

blocks back to back. This is

recommended for facing

applications. Alternatively solid

units such as Hemelite Ultra or

Topcrete RPW can be specified.

Wall widths of 215mm can also

be met by laying 100mm blocks

flat (on their sides). This is

recommended where finishes

such as plaster or drylining are to

be applied to the wall. A number

of recent product innovations

such as the Topcrete Midi,

Multicore and RPW blocks have

been designed to combine

technical properties with safe

handling requirements.

For guidance on approximate

unit weights, reference should

be made to the size and unit

weight tables in this brochure.

Movement controlMovement joints should be

provided in accordance with

BS 5628-3 generally at intervals

of 7 – 8m. Movement joints are

not usually necessary for internal

walls in dwellings. In areas of

concentrated stress, such as

above and below openings,

consideration should be given to

the introduction of bed joint

reinforcement.

MortarThe mortar type should be

selected taking into account

durability, structural strength

and provision for movement.

Detailed guidance on the

selection of mortars is given in

BS 5628-3 and BS 8000-3.

For work above ground level

(DPC), mortar designation (iii)

will normally be satisfactory.

Below ground level, mortar

designation (iii) or (ii) may be

used in accordance with in

BS 5628-3.

The design of walls employing

high strength blocks, typically

10.4N/mm2 or greater, will result

in enhanced loadbearing

capacity when designation (ii) or

(i) mortars are used.


Hemelite and Topcrete Design

Suggested mortar mixes

Work above DPC – mortar designation (iii)a) 1 portland cement,

1 hydrated lime,

6 sand

b) 1 portland cement,

6 sand + plasticiser

c) 1 masonry cement

5 sand

Work below DPC – mortar designation (ii)

a) 1 portland cement

4 sand + plasticiser

Notes The sand should conform to BS 1200 Factory produced mortars or carefully gauged site mixed mortars should be used

Flat tie inalternatecourses

Jointfiller

Sealant asrequired

Typical movement joint

Wall tiesUse wire butterfly or double

triangle ties complying with

BS 1243, or other ties complying

with DD 140-2 at the density and

positioning required by the

Building Regulations and

BS 5628-1 & 3.

For separating walls, butterfly

ties or ties conforming with Type

A as specified in Approved

Document E should be used.

Design GuideMore detailed design

information including advice on

structural design, durability and

movement control can be found

in the Topblock Design Guide.


Hemelite and Topcrete Design

Blockwork to: (state location)

Blocks to BS EN 771-3*: Topcrete dense aggregate blocks

Hemelite lightweight aggregate blocks

Manufacturer: Tarmac Topblock Limited

Type: Topcrete: *Solid *Cellular *Hollow *Cellular Multicore

Hemelite: *Solid *Cellular *Hollow

Grade: *Standard grade *Paint Quality

Compressive strength to BS EN 771-3 (N/mm2) Topcrete: *3.6 *7.3 *10.4

Hemelite: *3.6 *7.3 *10.4 & *22.5

Topcrete shape and dimensions:

Regular block: 440mm length x ……mm width x 215mm high

Midi block: 290mm length x 140mm width x 215mm high

Residential Party Wall (RPW) block: 290mm length x 190mm width x 140mm high

Reveal block: 440mm or 215mm length x 100mm width x 215mm high

with a cavity return of 65mm

Coursing brick: 215mm length x 100mm width x 65mm high

Hemelite shape and dimensions:

Regular block: 440mm length x ……mm width x 215mm high

Foundation block: 290/300mm x 255mm x 140mm high

Reveal block: 440mm or 215mm length x 100mm width x 215mm high

with a cavity return of 65mm

Coursing brick: 215mm length x 100mm width x 65mm high

Notes * Delete as applicable

† Not all strengths are available in all grades: please refer to material properties table

Specification

Sitework No matter how superior the

product or design, the

workmanship on site will have a

major influence on the standard

of the completed project. As

technical standards improve,

there is a growing trend towards

reliance on good site practice to

enable buildings to meet

prescribed levels of performance

in a number of key areas.

For comprehensive information

on construction and site practice,

including application of finishes,

fixings and mortar mixes,

reference should be made to the

Topblock Sitework Guide.

Delivery and storageDelivery is normally by crane-

offload road vehicles. Delivery by

alternative vehicle type is

available by arrangement.

Shrinkwrapping of products is

available as an optional extra.

All products are cured upon

leaving the factory and are ready

for immediate use.

Packs of blocks should be stored

on firm and level ground,

stacked no more than 3 high,

clear of standing water, taking

care to ensure that the stack is

stable. Once packs have been

opened, blocks should be

protected by waterproof

sheeting or similar against frost,

rain and mud splash.

If blocks have become excessively

wet, they should be allowed to

dry out before use.


Hemelite and Topcrete Sitework

CI/SfBFf4

September 2006

Tarmac Topblock LimitedMillfields RoadEttingshallWolverhamptonWest Midlands WV4 6JP

Website: www.topblock.co.uk

Although Tarmac Limited does its best to ensure that any advice, recommendations or information it may give is accurate, no liability or responsibility of any kind (including liability for negligence) is

accepted in this respect by Tarmac Limited, its staff or agents. Claims and statements made by Tarmac Limited regarding its products refer to those which have been properly handled on site. Tarmac

Limited cannot accept any liability or responsibility of any kind (including liability for negligence) for problems caused by the acts or omissions of third parties or by poor practices.

Tarmac and the ‘T’ mark are registered trademarks of the Tarmac Group.

Where do I find more? Tarmac Topblock offer a complete range of aircrete, lightweight and dense products. As a UK market leader you can

expect our blocks to meet the most demanding of building regulations and requirements. To make contact could

not be easier!

National Sales HelplineCall us on: 0845 606 2468

Technical Helpline Call us on: 0870 242 1489

Email: [email protected]

Literature requests: Call us on: 08456 044 114

Email: [email protected]

Quote reference L105

The product brochures available include:

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