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<Preliminary / Detailed> Design ReportWeathertightness Remediation

Block X - < Building Name > at < School Name >

< Insert an overview image of the building or design theme in this box >

< Delete the sample images above >

< Date >

Prepared By: < Company Name >

For the Ministry of EducationVersion 1.0 Template, September 2019

Document Control Records

Document Prepared by:

< Full Legal Company Name >

< Company Address >

Telephone: < Company Phone Number >

Email: < Company Email >

Revision HistoryRevision

No. Prepared By Description Date

Document AcceptanceAction Name Position Signed Date

Prepared by:

Reviewed by:

Approved by:

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All text on the front and inside cover of this template within “< >” needs to be checked and overwritten as re-quired.

The document revision and acceptance tables above need to be completed by the Architect / Designer team.

Table of Contents

1 Introduction.............................................................................................................................. 4

1.1 Purpose of Report............................................................................................................4

1.2 Project Overview..............................................................................................................5

1.3 Project Team.....................................................................................................................5

2 General Information.................................................................................................................6

2.1 Building Location.............................................................................................................6

2.2 Building Overview............................................................................................................6

2.3 Existing reports................................................................................................................7

2.4 Weathertightness Issues and Constraints.....................................................................7

3 Weathertightness Failure........................................................................................................8

3.1 Ministry’s Chosen Scope of Work...................................................................................8

4 Design Response.....................................................................................................................9

4.1 Proposed Remedial Work................................................................................................9

4.2 Upgrades and Substitutions............................................................................................9

4.3 Means of Building Code compliance............................................................................10

4.4 Construction Phase QA procedures.............................................................................10

5 Design Checklist.................................................................................................................... 11

5.1 Preliminary Design Stage..............................................................................................11

5.2 Detail Design Stage........................................................................................................14

Appendix A - Architectural Documents..........................................................................................15

1 Introduction

1.1 Purpose of ReportThe purpose of this Preliminary Design report is to clearly present to the Ministry of Education the recom-mended remedial work solutions that will address the identified weathertightness failures that are causing con-sequential damage to the building. In addition it records the following:

1. Any changes to the solutions, weathertightness failures and/or consequential damage identified in the Remediation Inspection report, and the reasons for these changes;

2. An outline of the means of achieving building code compliance, with a brief description of the ratio-nale behind any alternative solutions;

3. An outline of any proprietary systems used, with a brief description of, and rationale for, any varia-tions from manufacturers’ literature.

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For the Detailed Design report, use the following section and delete the Preliminary Design Section above:

The purpose of this Detailed Design report is to clearly present to the Ministry of Education the remedial work solutions that will address the identified weathertightness failures that are causing consequential damage to the building. In addition it records the following –

1. Any changes to the solutions, weathertightness failures and/or consequential damage identified in the Preliminary Design report, and the reasons for these changes.

2. Descriptions of the means of achieving building code compliance, with more detailed descriptions of the rationale behind any alternative solutions, adequate to support any building consent appli -cation;

3. A description of any proprietary systems used, with more detailed descriptions of, and rationale for, any variations from manufacturers’ literature, adequate to support any building consent appli -cation;

4. A description of specific remediation work sections included in the Detailed Design specification;5. A description of the construction phase QA procedures to be included in the Detailed Design docu-

mentation;6. A list of the required inspections to be carried out by the designer, if not clearly identified in the QA

procedures; and7. A list of any specific remediation works requiring specific skills that may not be within the usual

competencies of a remediation contractor.

This report may also be provided to other interested parties including the School’s BoT and Building Consent Authority when a building consent application for the works is being lodged.

1.2 Project Overview

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Provide a brief overview of the Building’s history, location and the nature of the weathertightness failure works to be addressed. State the Ministry’s budget for the project and approximate timeframe for carrying out remedial works.

(Note: as an indicative guide, the Project Overview section should fit within half a page).

1.2.1 Non-Weathertightness Scope

Whilst the focus of this report is towards weathertightness remediation, other elements of work that are pack -aged into the overall project for this building include:

1. <insert scope item>2. <insert scope item>

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Expand this section and provide a summary of any works not related to weathertightness remediation if applicable. As an example, other elements might include:

Upgrades to Learning Spaces Seismic Strengthening Fire protection upgrades as required by the Building Act Section 112 and/or MoE Policies Accessibility upgrades as required by Building Act Section 112 Associated siteworks etc.

1.3 Project TeamThe Project Team members involved are listed as follows:

Role Name Company

Ministry’s Project Lead (normally a Delivery Manager or Prop-erty Advisor) Ministry of Education

Project Manager

Architect / Designer

Timber remediation specialist

Structural Engineer

Mechanical Engineer

Electrical Engineer

Hydraulic Engineer

Fire Engineering

Other (list)

Role Name Company

2 General Information

2.1 Building LocationDelete this box:

Note: Insert an image of the site that clearly identifies the building, location and Ministry’s Block number reference (an image is normally available from the Remediation Inspection Report).

2.2 Building OverviewDelete this box:

Note: Complete the table below to provide a succinct overview of the existing building (this information is normally available from the Remediation Inspection Report).

Building

School Block and street address < School name >< block number or number off site plan and street ad-dress>

Ministry’s Block Name/ Descrip-tion and storeys

< e.g. Main Hall or Admin block >< 1 storey building containing classrooms >

Function of building < e.g. Administration with 2 teaching spaces attached >

Building

Known Standard Design < e.g. Ahead hall, etc. or non-standard >

Year of design (approx.) - is construction 1995 onwards?

< give details e.g. constructed 1980 with renovation in 1998 and 2004 extensions, report only applies to 1998, 2004 works, unless otherwise stated >

Construction

Foundation/flooring system(s) < give details >

Wall/Cladding/System(s) < give details >

Roof system(s) < give details >

Roof slope(s) < give details >

Exterior joinery material < give details e.g. aluminium double glazed; timber single glazed >

Other relevant construction details

< give details e.g. paths likely poured after construction reduce ground clearance on two elevations to approx. 30mm >

Site

Wind zone (refer NZS 3604) < give details >

Exposure zone (refer NZS 3604) < give details >

Snow loading (refer NZS 3604) < give details >

Rainfall (mm/hr) (refer E1/AS1)

Climate Zone (refer clause H1)

Earthquake Zone (refer NZS 3604)

2.3 Existing reportsThe relevant reports that relate to the existing building are listed as follows:

Report Title Company Revision and Date

2.4 Weathertightness Issues and ConstraintsDelete this box:

Summarise any key considerations or constraints from site analysis activities, including information within the reports listed above:

Logistical issues may include access, relocation or decanting of students into temporary accommodation or construction phasing.

Building-specific issues including any as air-testing reports, asbestos containing material reports, seismic resilience requirements or heritage constraints.

Site-wide issues could relate to snow loading, marine exposure, high wind, surface water flooding etc.

3 Weathertightness Failure

3.1 Ministry’s Chosen Scope of Work

3.1.1 Remediation Inspection Report

The weathertightness failures and consequential damage identified in the Remediation Inspection report, and that the Ministry has decided to address are summarised as follows:

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List the scope of work items (weathertightness failures and consequential damage) that the design team have been instructed to carry out. Normally, this will reflect the scope of work summarised in the Remediation Inspection Report.

3.1.2 Additional Failures or Damage

Further to our engagement, the following additional weathertightness failures and consequential damage that have been identified and confirmed by the Ministry to be addressed are summarised as follows:

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If additional weathertightness failures and consequential damage has been discovered during the Preliminary Design phase then list these here.

4 Design Response

4.1 Proposed Remedial Work

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Summarise the proposed solutions that will address the identified weathertightness failures, consequential damage and adjacent works. Cross-reference details, drawings and specifications notes as required. Present the influencing factors and constraints that have led to the particular solutions being put forward.

At Preliminary Design stage, highlight any changes to the remediation approach that differ to the previous recommendations in section 4 of the Remediation Inspection Report.

4.2 Upgrades and Substitutions

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Where such issues as complexity of construction, risk of future failure, increased durability or aesthetics lead the design team to consider different or substitute materials or systems to that recommended in the Remediation Inspection Report, provide a supporting rationale with any impacts to cost.

An example may be the replacement of existing cement based sheet cladding and upgrading this to timber weatherboard for aesthetic or durability reasons.

4.3 Means of Building Code complianceDelete this box:

Identify whether the Remedial works are based on an Acceptable or Alternative Solution or whether a Verification Method is being followed. Also state whether the proposal involves a Proprietary System(s) and if there are amendments to the manufacturer’s requirements.

Where an Alternative Solution and/or amendments to the manufacturer’s requirements are used provide a rationale for the design solution chosen and the basis for complying with the Building Act and Building Code.

The information provided here should align with the Building Consent application form.

4.4 Construction Phase QA proceduresDelete this box:

Summarise the construction phase QA procedures that will be included in the Detailed Design documentation. If these differ to usage of the Ministry’s Project Specific Quality Assurance Plan template, then provide the reason why.

5 Design Checklist

5.1 Preliminary Design StageArchitects / Designers are required to answer all questions in this section as part of their Preliminary Design Report. The checkboxes in the list are activated by a double click in MS Word. If any of the ‘No’ or ‘N/A’ boxes are checked, explanatory notes must be provided in the comments’ column.

General Yes No N/A Comments

Do the latest plans and amendments show changes (clouded) with version numbering and dates?

Is a project specific QA plan being developed?

Are the outline specification notes project specific?

Have recommendations from the Remediation Inspection Report been incorporated?

Have any scope changes from the Remediation Inspection Report been recorded and justified?

Has a check been made to establish whether the existing building requires any seismic strengthening?

(this issue should be confirmed with the Ministry)

Has a check been made to establish whether the existing building needs any fire engineering input?


Has a check been made to establish whether there are any asbestos containing materials (ACM) in the existing building & if so, has a demolition survey been prepared?


Compliance Yes No N/A Comments

If an Alternative Solution being proposed, has a supporting rationale been provided?

If proprietary systems are being used, is there a BRANZ Appraisal, codemark or other form of certification?

Have the limitations of a codemark or BRANZ Appraisal been considered and addressed?

Has a check been made to determine whether the building’s occupants need to be vacated during the remediation works?


Compliance Yes No N/A Comments

Surface Water Yes No N/A Comments

Are floor and finished ground levels shown on the plan?

Are finished ground levels formed to carry water away from the building?

Has the size and capacity of channel drains been checked?

Has the size and capacity of roof gutters and downpipes been checked?

Structure Yes No N/A Comments

Has a check been made to establish whether any existing wall bracing elements are affected?

Timber Framing Yes No N/A Comments

Is a timber remediation expert to be employed during the construction phase?

Wall Cladding Yes No N/A Comments

If the cladding system has open (expressed) joints, has a Rigid Air Barrier (RAB) system been incorporated?

Do existing cladding systems have sufficient clearance above finished ground levels?

Has an option to increase the durability of the new cladding system been considered and / or discussed with the Ministry?

Roofing Yes No N/A Comments

Has a rationale been provided if replacing existing roof surfaces and the existing falls are less than recommended?

Have membrane fall heights been calculated to ensure they can be achieved on site (e.g. clashes with high level window sills)?

Where a change of roofing is proposed (from membrane to metal roofing), have the acoustic ramifications been considered and allowed for?

Have maintenance requirements of all material and system selections been considered? Provide comment.

5.2 Detail Design StageArchitects / Designers are required to answer all questions in this section as part of their Detail Design Report. The checkboxes in the list are activated by a double click in MS Word. If any of the ‘No’ or ‘N/A’ check boxes are checked, explanatory notes must be provided in the comment’s column.

General Yes No N/A Comments

Do the latest plans and amendments show changes (clouded) with version numbering and dates?

Has a project specific construction phase QA plan been provided?

Is the specification project specific?

Have large scale details for all key flashings, junctions, changes of plane and assembly details been provided at 1:5 or 1:2 scale?

Have 3D views of all complex flashing details been provided?

If required as a part of the project, have seismic strengthening issues been coordinated with the weathertightness remediation works?

If required as a part of the project, have fire engineering issues been coordinated with the weathertightness remediation works?

Has a timber remediation section been included in the specification?

Has the design considered thermal expansion for metal roofs (particularly roofs with sheet length/ flashings/ gutters over 12m in length)?

Has the metal roof design been checked for aggravated thermal bridging?

Has a check been done to confirm material compatibility of all external envelope components?

Has full design coordination been undertaken with other consultants (structural engineer, mechanical engineer etc.)

Appendix A - Architectural DocumentsDelete this box:

List drawing / document numbers, titles, dates and revisions below. An alternative approach is to insert a copy of the drawing register and list any other relevant documents.

Drawings

Title Size Drawing number Revision Date

Specification

Title Size Ref. number Revision Date

Other Supporting Information

Title Size Ref. number Revision Date