Source: http://docplayer.net/12700-Guide-to-standards-and-tolerances-2015.html
Timestamp: 2017-09-22 03:18:03
Document Index: 376707440

Matched Legal Cases: ['art 1', 'art 2', 'art 2', 'art 3', 'art 1', 'art 2']

GUIDE TO STANDARDS AND TOLERANCES PDF
Download "GUIDE TO STANDARDS AND TOLERANCES 2015"
1 GUIDE TO STANDARDS AND TOLERANCES 2015
2 FOREWORD The Guide to Standards and Tolerances (the Guide) has been developed for use by builders and building owners as a convenient reference for acceptable standards of workmanship in domestic building construction. It is intended to address areas that are not prescribed under legislation or under a domestic building contract. Generally, parties to a building contract can agree on the standards they consider appropriate to their building project. Preferably, that agreed scope and standards of work is comprehensively detailed in the contract documents. Where it is not, there is risk of dispute at a later stage. While the parties can agree on applicable standards, they cannot apply standards lower than those required by building regulation. The content of this Guide is based on technical standards and industry tolerances that describe (or refer to) what is considered an acceptable standard of finished workmanship in domestic building construction. It should be understood that this is a guide only and that all other documents prescribing statutory and contractual requirements, relevant to the contract, take precedence over this guide. 2 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
3 Acknowledgement The Guide to Standards and Tolerances 2015 was produced by the Victorian Building Authority. All information, diagrams and materials included in this publication, except those expressly indicated as belonging to Standards Australia International Limited (SAIL), are the property of the Victorian Building Authority. Diagrams and materials included in this publication, the copyright of which is owned by SAIL, have been reproduced by the VBA with the kind permission of the copyright owner and SAI Global Limited (SAI). For the reader s convenience, we have indicated the relevant Australian Standard which references the diagram or materials in question. These are all available for purchase from SAI. For further information, please visit the SAI website at Disclaimer The content in this publication is provided for information purposes only. Although the Victorian Building Authority (VBA) believes that all information contained in this document is accurate and reliable as at the date of publication, the information must not be relied on or regarded as legal advice. The VBA provides no warranty about the accuracy, reliability or authenticity of any information or material contained in this publication, and accepts no liability whatsoever for direct or consequential loss or damage to any person in connection with the information or advice (or the use of such information or advice) which is provided in this publication or incorporated by reference. Information is provided on the basis that all persons accessing this publication or any materials referred to in it, do so at their own risk and undertake responsibility for assessing the relevance and accuracy of any and all content. Copyright Copyright Victorian Building Authority. Copyright in the content and design of this publication including all text, logos, diagrams and images, is owned by the Victorian Building Authority (except to the extent a different copyright owner is expressly identified in the publication). Except in the limited circumstances set out in the Copyright Act 1968 (Cth), no part of this publication must be reproduced, copied, adapted, modified, communicated or otherwise used without written permission from the Victorian Building Authority (which may be withheld at the Victorian Building Authority s absolute discretion). 3 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
4 CONTENTS A Introduction 9 B Authority of the Guide 10 C Application of the Guide 11 D The measurement of time 11 E The measurement of tolerances 12 F Inspecting surfaces from a normal viewing position 14 G Remedial work 15 H Responsibility to rectify 15 I Renovations, alterations and extensions 16 J Recycled materials 16 K Building maintenance Care of the building and site after completion 17 L Australian Standards and other referenced material 17 M Schedule of References used in this Guide 18 1 SITEWORKS (PAVING AND LANDSCAPING) Cracking in concrete paving Finish to external concrete paving Surface drainage 20 2 FOOTINGS, SLABS AND SETTING OUT Foundation and site drainage maintenance after occupation Footings and slabs Setting out the site External building dimensions Measuring internal building dimensions Building dimensions Finished floor levels Levelness of concrete floors Dimensions of building elements Cracks in concrete slabs Finish to concrete slabs Repairs to exposed concrete slabs 24 3 MASONRY Masonry types Damage to masonry walls Movement; control joints in masonry walls Masonry construction Blending and matching of masonry repair work Blending and matching of masonry new work Masonry facing Mortar for masonry Voids and holes in mortar Cracked masonry unit Cleaning, mortar smears and stains 31 4 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
5 3.12 Masonry inside garages and similar spaces and under applied finishes Vertical alignment of perpend joints Horizontal alignment of bed joints Base bed joint and base row of masonry Masonry that overhangs concrete slabs Damp proof courses Raking of joints Brick sills, sill tiles and shrinkage allowance for timber framing 32 4 FRAMING Verticality or plumbness of stumps or piles Verticality or plumbness of steel and timber frames and exposed posts Straightness of steel and timber frame surfaces Packing under bearers Timber shrinkage Treads and risers in timber stairs Fixing stud walls to concrete slabs Bottom plates that overhang concrete slabs 36 5 WALL CLADDING Leaks in wall cladding Wall cladding 37 6 ROOFING Leaks in roofing, flashings and accessories Roof cladding Roof tiles Roof tile pointing Overhang of roofing (tiles and sheet roofing) Cutting of roof tiles Dry valley construction Undulating tiled roof lines Alignment of trusses Verticality or plumbness of trusses 40 7 PLUMBING Plumbing Positioning of gutters Water retention in gutters Joints in gutters Fixing of gutters and downpipes Flashings Water hammer Pipe penetrations through external walls and inside cupboards Water supply fixtures Water drainage from baths, basins, sinks, troughs or the like Parapet flashings/cappings 45 5 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
6 CONTENTS 8 WINDOWS AND DOORS Installation of external windows and doors Weather-tightness of windows, doors, and window and door frames Door furniture Internal door clearances Distortion of doors Sealing of door edges Operation of windows and doors Bowed window heads, sills and jambs 47 9 PLASTERING AND RENDERING Verticality or plumbness of internal and external wall surfaces Straightness of internal and external wall surfaces Matching and repairing existing rendered surfaces Cracking and other blemishes in rendered or hard plastered surfaces on a masonry substrate Repairs to applied finishes Movement; Control joints provision and cracking Covering movement control joints and damp-proof courses Cracking in applied finishes used over lightweight substrate Rendered surfaces Cracking in external mouldings Plasterboard sheeting Other sheeting systems Level of finish for plasterboard Cracking in plasterboard, hard plaster and other plaster elements Cracking in cornices Cracking at junctions of dissimilar materials Straightness and alignment of plaster cornices Peaking or jointing in plasterboard Nail popping in surfaces INTERNAL FIXING Gaps associated with internal fixing Joints in fixing of internal mouldings Architrave quirks Bench tops, cabinet doors and drawer fronts Natural materials Manufactured material Rectification of defective natural materials and manufactured materials Joints in timber, stone and laminated bench tops Sealing around benches and items installed in benches 53 6 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
7 11 FLOOR AND WALL TILING Floor and wall tiling Floor and wall tiling where the builder supplies the tiles Floor and wall tiling where the owner supplies the tiles for laying by the builder Floor and wall tiles where the owner supplies and lays the tiles Cracked, pitted, chipped, scratched or loose tiles Grouting and joints Flexible sealants to junctions Uneven tiling Lippage (stepping) between tiles Movement joints PAINTING Standard of painting Surface finish of paintwork Nail and screw fixings Natural characteristics and mechanical imperfections/damage Paint durability WET AREAS, DECKS AND BALCONIES General Wet areas Shower recess and components Leaks in waterproof decks and balconies Waterproof decks and balconies substrate Decks and balcony freeboard outside windows and doors Ponding on waterproof decks and balconies Calcification and efflorescence associated with decks and balconies FLOORS Timber flooring shrinkage and swelling Timber flooring Gaps in exposed timber flooring Joint swelling in timber, plywood and particleboard flooring Nail popping in timber, plywood and particleboard floors Squeaking floors Springy floors Levelness of timber floor Splitting of timber decking ELECTRICAL Electrical 62 7 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
8 CONTENTS 16 POOLS AND SPAS Concrete pools and spas Premoulded fibre-reinforced plastic pools and spas Variations from documented dimensions in concrete pools and spas Variations from documented datum in concrete pools and spas RESTUMPING Restumping Consequential damage due to restumping Floor levels after restumping GENERAL Appliances and fittings Faults and damage to appliances and fittings Condensation Glazing Lyctus borer Termites Termite damage Cleaning Maintenance in relation to the performance of building foundations/footings Floor coverings 68 Appendix A 69 Relevant legislation 69 History of editions 69 8 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
9 A INTRODUCTION Every year thousands of homes are constructed or renovated in Victoria. While most building projects are completed successfully, occasionally there may be concerns or unmet expectations that result in a dispute. Most domestic building disputes arise because of disagreements between building owners and builders about the appropriate standards and quality of work. Although the minimum standards for some aspects of construction are regulated, many aspects are not. Builders and building owners can help prevent disputes by agreeing on the standards and quality of workmanship appropriate for the project when they enter into the building contract, although they cannot apply standards lower than those regulated by Government. However, many domestic building contracts don t include an agreed scope of work and standards. The Guide to Standards and Tolerances 2015 (the Guide) has been developed for builders and building owners to use as a convenient reference to the minimum technical standards and quality of work. The Guide provides references to relevant areas of legislation and gives guidance on areas of building standards that are not covered by legislation. Building work that does not meet the standards outlined in the Guide could be considered defective. The Guide can be used to help resolve disputes about the quality and standards of work. However, it should be understood that this document is intended as a guide only, all other documents stating statutory and contractual requirements take precedence over this Guide. 9 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
10 B AUTHORITY OF THE GUIDE Each state and territory has legislated to empower the making of building standards and to control the key elements of a domestic building contract. Regulated building standards are predominantly contained within the National Construction Code Series, Volumes 1 and 2, Building Code of Australia (BCA) which is adopted into law by regulation. In a hierarchy, the regulatory framework for building standards starts with the relevant Act of Parliament or Legislative Assembly, passes to regulations made under that Act, then to the BCA, to Australian Standards and other documents adopted by reference in the BCA. The Guide to Standards and Tolerances 2015 is only a guide and an advisory document. It is not a regulated standard and is not part of this hierarchy. Each state and territory has an Act to regulate the contents of a domestic building contract and the responsibilities of parties. These Acts also require compliance with regulated building standards and require buildings and their materials to be fit for their intended purposes. In Victoria, the Domestic Building Contracts Act 1995 defines the term defective as: In relation to domestic building work, includes: a) a breach of any warranty listed in section 8 b) a failure to maintain a standard or quality of building work specified in the contract. This Guide can be used to determine whether or not an item is defective only where this cannot be done by reference to the contract documents, the relevant Australian Standards, the BCA or the relevant regulations. Where there is any contradiction or difference between the Guide and an Act, a regulation, the BCA or a building contract, all of these take precedence over the Guide. The Guide does not replace the requirements of these other documents. Any reference throughout this document to the Building Code of Australia or BCA refers to the National Construction Code Series, Volumes 1 and 2, Building Code of Australia. Some Australian Standards are referred to (whole or in part) in the BCA. The referenced parts of these Australian Standards take precedence over this Guide. Fittings, equipment and some materials used in buildings are often supported by manufacturer s installation instructions. The manufacturer s installation instructions take precedence over this Guide. 10 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
11 C APPLICATION OF THE GUIDE The Guide is intended to inform parties as to what is an acceptable standard of workmanship in domestic building work. It should be noted that builders, subsequent owners and those purchasing from owner-builders or developers can also use this Guide to resolve possible disputes, irrespective of whether or not they were a party to the original building contract. This edition of the Guide is valid from 30 March 2015 and is applicable to domestic building contracts entered into from that date, or domestic building work that commences from that date (where there is no domestic building contract). D THE MEASUREMENT OF TIME Any time period mentioned in the Guide is to be taken to start at the date of completion of the building work as it is legislated in the state or territory where the building work is located. Generally, the date of completion is the day when the work carried out under the contract is completed in accordance with the terms of that contract, or the day the building owner is given the statutory permit (i.e. Occupancy Permit) or certificate (i.e. Certificate of Final Inspection) that authorises the occupation or use of the building. A more precise definition should be given in the contract associated with the building work. 11 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
12 E THE MEASUREMENT OF TOLERANCES The tolerances in this Guide apply up to and including the length over which each tolerance is stated to apply. It is not intended that tolerances will be interpolated or proportioned to the actual length of building element measured. For example, where the Guide specifies a 4 mm maximum deviation measured over a 2 m length of wall surface, the Guide means that the same 4 mm deviation is to be applied over a 1 m wall surface or a 500 mm wall surface. The tolerance cannot be interpolated to mean a 2 mm deviation over a 1 m wall surface or 1 mm deviation over a 500 mm wall surface. Similarly, deviations over longer wall surfaces would be defects if the deviation exceeded 4 mm within any 2 m length of that surface. Horizontal, vertical and diagonal surface tolerances are to be interpreted in the same way. Horizontal surfaces Deviations of a horizontal surface are to be measured from a datum nominated in the contract documents or inferred, if none is nominated. Where there is a nominated or inferred datum, the maximum deviation from that datum will not exceed the deviation stated in the Guide. Where no datum is nominated and a datum cannot be inferred, a datum level will be taken to be at the highest or lowest points in the building element, room or area being measured. Refer to diagram E(i). Horizontal flatness to be measured as shown in Diagrams E(ii) and (iii). Vertical surfaces Deviations of a vertical surface from a true vertical plane are to be measured from a plumb line through a plan position or reference point nominated in the contract documents or inferred, if none is nominated. The maximum deviation of a vertical surface from that plumb line will not exceed the deviation stated in the Guide. Refer to diagram E(iv). Vertical flatness to be measured as shown in Diagrams E(v) and (vi). Where diagrams are provided for the clarification of details, the diagram shows only detail relevant to the issue and is not intended to be used as a general detail for construction. 12 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
13 DIAGRAM E MEASUREMENT OF HORIZONTAL TOLERANCES i) Measurement of deviation from horizontal/level Spirit level HORIZONTAL LEVEL LINE Surface being tested Maximum deviation ii) Measurement of bow Straight edge Surface being tested Maximum deviation iii) Measurement of bow (horizontal flatness) Straight edge Equal height packing to both ends Surface being tested Maximum deviation DIAGRAM E MEASUREMENT OF VERTICAL AND INCLINED SURFACES Maximum deviation VERTICAL PLUMB LINE Spirit level Straight edge Maximum deviation Surface being tested Surface being tested Maximum deviation Equal HT spacers Straight edge to be centred over bow BASE OF WALL BASE OF WALL BASE OF WALL iv) Measurement of deviation from vertical/plumb v) Measurement of bow (surface flatness) vi) Measurement of bow (surface flatness) 13 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
14 F INSPECTING SURFACES FROM A NORMAL VIEWING POSITION Generally, variations in the surface colour, texture and finish of walls, ceilings, floors and roofs, and variations in glass and similar transparent materials are to be viewed where possible from a normal viewing position. A normal viewing position is looking at a distance of 1.5 m or greater (600 mm for appliances and fixtures) with the surface or material being illuminated by non-critical light 1. Non-critical light means the light that strikes the surface is diffused and is not glancing or parallel to that surface. DIAGRAM F NORMAL VIEWING POSITIONS Wall 1500 mm 1500 mm Floor Ceiling 1500 mm 600 mm Viewing fixtures and appliances Slight variations in the colour and finish of materials do not always constitute a defect. 1 Non-critical light is defined in appendix.b3 and D7 Australian Standard AS/NZS Refer also to CSIRO TR 90/1, Report No. L VBA GUIDE TO STANDARDS AND TOLERANCES 2015
15 G REMEDIAL WORK It is envisaged that work to rectify defects will be carried out to match as closely as practical the surrounding materials, finishes, levels and other characteristics of the area to be rectified. In some circumstances, exact matching may not be possible. Structural rectification work may need to be designed by a structural engineer and inspected or certified by a building surveyor or certifier. Some remedial work may need to be agreed by way of a contract variation and variation to a building permit or construction certificate before it is carried out. H RESPONSIBILITY TO RECTIFY A builder may not be liable to rectify building design and defects that do not arise from the builder s or the builder s subcontractor s work and design. Builders do not have to rectify damage caused by the owner s actions or those of other people engaged by the owner. Builders may be liable to repair damage caused to property in the course of completing their building work. The following are examples of liability between the owner and the builder: a) A builder is unlikely to have to repaint a poorly painted wall that was painted by the building owner. b) A builder is unlikely to have to repair a distorted gutter when the damage was caused by an owner placing a ladder against the gutter. c) A builder is unlikely to have to repair a stormwater drain that was properly constructed and later blocked by tree roots. d) A builder is likely to have to replace untreated pine in an external deck that was installed by the builder instead of the durable timber required for this structure. e) A builder is likely to have to repair an existing window in a house that the builder accidentally damaged when constructing another part of the house. Where there is subsequent damage to the building due to defective building work as a result of the: a) owner failing to keep the completed work reasonably maintained, or b) unreasonable delay by the owner in notifying the builder of the defect, the builder may not be liable to rectify or compensate the owner. Where reference is made in the Guide to the builder s workmanship, work of the builder or the like, this includes work by contractors or sub-contractors engaged by the builder. In Victoria, the Domestic Building Contracts Act 1995 defines the term builder as being: A person who, or a partnership which: a) carries out domestic building work; or b) manages or arranges the carrying out of domestic building work; or c) intends to carry out, or to manage or arrange the carrying out of, domestic building work. 15 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
16 I RENOVATIONS, ALTERATIONS AND EXTENSIONS The standards and tolerances in this Guide only apply to the work covered in the relevant domestic building contract. It is recommended that before starting new work, the builder informs the owner of any potential circumstances and conditions of the existing building that may have a detrimental effect on the standard of the new building work. The builder and owner should agree as part of their domestic building contract, or as a written variation to that contract, on the extent of any necessary rectification works that may be required to be carried out to the existing building before commencing that work. J RECYCLED MATERIALS The standards and tolerances in this Guide may not apply to construction with secondhand or recycled materials and products. Where there is a contract, the use of secondhand or recycled material must be stated in that contract. Second-hand or recycled materials and products must be fit for purpose and suitable for its proposed use. 16 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
17 K BUILDING MAINTENANCE CARE OF THE BUILDING AND SITE AFTER COMPLETION Building maintenance is an ongoing responsibility for all building owners to ensure their building continues to perform as intended. Therefore it is recommended owners consider the information in Explanatory Note 2A at the start of Section 2 of this Guide. These documents and other similar documents discuss soil movement and its effects on buildings, including the effects of tree planting and site drainage. Owners can reduce the risk of cracking and damage to building structures by adopting the landscape care suggestions in these documents. Refer to the following within this Guide: a) Explanatory Note at the start of Section 2 b) Clause 2.01 Foundation and site drainage maintenance after occupation c) Clause Maintenance. L AUSTRALIAN STANDARDS AND OTHER REFERENCED MATERIAL Where this Guide refers to Australian Standards or other reference material, the edition referred to is the one that was current at the time the contract was signed. In many cases this will be a document referred to in the Building Code of Australia that was current at that time. Where a contract specifies an alternative reference to the ones listed over the page, that reference may be applicable to the work. However, this does not override any statutory obligations to comply with the building legislation. 17 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
18 M SCHEDULE OF REFERENCES USED IN THIS GUIDE BCA 2014 AS AS AS AS AS AS AS AS AS AS AS AS AS AS AS/NZS AS/NZS AS/NZS AS/NZS AS/NZS CSIRO document BTF CSIRO document BTF CSIRO document BTF CSIRO document BTF CSIRO TR 90/1, Report No. L National Construction Code Series, Volumes 1 and 2, Building Code of Australia (BCA) Residential timber-framed construction Particleboard flooring Installation Windows in buildings Selection and installation Use of reinforced concrete for small swimming pools Timber Hardwood Sawn and milled products Residential slabs and footings Ceramic tiles Part 1: Guide to the installation of ceramic tiles Ceramic tiles Part 2: Guide to the selection of a ceramic tiling system Termite management Part 2: In and around existing buildings and structures Guidelines Masonry structures Guide to residential paving Waterproofing of domestic wet areas Waterproofing membranes for external above-ground use Masonry in small buildings Construction Swimming pools Premoulded fibre-reinforced plastics Installation Guide to the painting of buildings Gypsum linings Application and finishing Plumbing and drainage Part 3: Stormwater drainage Domestic kitchen assemblies Kitchen units Building Technology File 17 Plant roots in drains Prevention and cure Building Technology File Foundation maintenance and footing performance: A homeowner s guide Building Technology File 19 A builder s guide to preventing damage to dwellings: Part 1 Site investigation and preparation Building Technology File 22 A builder s guide to preventing damage to dwellings: Part 2 Sound construction method CSIRO Division of Building Research Report No TR 90/1 : Illumination and decoration of flat surfaces 5 th Edition (Revised) ABCB Handbook Condensation in Buildings (2014) /abcb-handbooks.aspx 18 VBA GUIDE TO STANDARDS AND TOLERANCES
19 1 1 SITEWORKS (PAVING AND LANDSCAPING) 1.01 Cracking in concrete paving Cracking in concrete is common and is not always attributable to unsatisfactory workmanship. Common causes of cracking include shrinkage stress, stress due to trees, commercial or heavy vehicle traffic, soil movement due to changes in the moisture content as a result of garden watering or drainage problems. Cracking not attributable to the workmanship of the builder (e.g. trees planted too close to paving, commercial or heavy duty vehicle traffic, use of sprinkler system, etc.) is not a defect. Cracking in concrete verandahs, garages, carports, paving, patios, driveways, etc. where the builder did not make allowances for shrinkage or general movement of the concrete (e.g. slip joints where required around penetrations such as verandah posts, pipes etc.) shall be assessed in accordance with Table 1.01 and is defective where the limits in that table are exceeded. TABLE 1.01 CRACKS IN CONCRETE PAVING Condition Measure Limit Cracking Crack width 1.5mm Subsidence Stepping Heave or slump under 3 m long straight edge (See Note 1 below) Relative surface level of adjacent paving elements within the expanse of the main pavement 15mm 5mm SITEWORKS (PAVING AND LANDSCAPING) Taken from: AS 3727 Guide to residential pavements, Table: 1 Performance criteria. Reproduced with permission from SAI Global Ltd under Licence 1407-c122. Notes to Table The straight edge is centred over the defect and supported at its ends by equal height spacers. The heave or slump is then measured relative to this straight edge. 2. The stepping criteria apply only to steps within the surface of the main pavement. It shall not be applied where the main pavement abuts other structures such as edging, drainage pits, service pits, minor pavements (such as a pathway adjacent to a driveway) and pavements constructed with materials of a different type. 3. The performance criteria in Table 1.01 apply within the first 12 months after construction of the pavement. 4. The builder may be responsible for works after 12 months if not constructed in accordance with the standard (AS3727). 5. The 12-month period has been adopted as being long enough for a pavement to be subjected to in-service conditions and prior to undue influence of changing environmental conditions such as the effect of tree roots. 19 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
20 Finish to external concrete paving Concrete paving finish is defective if it is not consistent in colour, texture and general appearance. Minor variations in finish may occur and may not be considered to be defective Surface drainage The paving/landscaping should direct surface water away from the building. Surface water drainage is defective if it is not in accordance with the requirements of the Building Code of Australia. SITEWORKS (PAVING AND LANDSCAPING) 20 VBA GUIDE TO STANDARDS AND TOLERANCES 2015
A guide to retrofit your home for better protection from a bushfire Building and renovation ideas to better prepare your home in a bushfire situation. Prepare. Act. Survive. Use these building ideas as
External moisture An introduction to weathertightness design principles
External moisture An introduction to weathertightness design principles To be read in conjunction with Acceptable Solution E2/AS1 This document is intended as guidance only and is issued under section
Manual. Design Criteria for Bridges and Other Structures
Manual Design Criteria for Bridges and Other Structures August 2014 Copyright http://creativecommons.org/licenses/by/3.0/au/ State of Queensland (Department of Transport and Main Roads) 2014 Feedback:
L Conservation of Fuel and Energy - Buildings other than Dwellings Building Regulations 2008 Te c h n i c a l G u i d a n c e D o c u m e n t Building Regulations 2008 Te c h n i c a l G u i d a n c e