CERTIFICATION OF CONSTRUCTION (DRAINAGE, HEATING & PLUMBING) TECHNICAL GUIDE

Transcription

1 CERTIFICATION OF CONSTRUCTION (DRAINAGE, HEATING & PLUMBING) TECHNICAL GUIDE

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3 TECHNICAL GUIDE FOR CERTIFICATION OF CONSTRUCTION (DRAINAGE, HEATING & PLUMBING) SCHEME In accordance with the requirements of the Building (Scotland) Act 2003 Building (Procedure) (Scotland) Regulations 2004 This Guide describes the technical requirements of the scheme and is published by SNIPEF, which was approved on 1 December 2009, as Scheme Provider, on behalf of the Scottish Ministers, by the Building Standards Division (BSD) of the Scottish Government s Directorate for the Built Environment. Further information about SNIPEF and the scheme can be found at Persons and organisations that are approved to certify drainage, heating and plumbing installations under the Building (Scotland) Act 2003 appear on the Certification Register. The Register is held by the Building Standards Division on behalf of Scottish Ministers, at SNIPEF believes that the guidance and information contained in this guide is correct, but all parties must rely on their own skill and judgement when making use of it. SNIPEF assumes no liability for any loss or damage caused by error or omission, whether as the result of negligence or any other cause. Any such liability is disclaimed. This guide may be amended by SNIPEF and re-issued due to amendments to the Scottish Building Standards or in the light of experience of its use at any time. Scottish Building Services Certification (SBSC) is a single portal owned by SELECT, NICEIC and SNIPEF for the production of Certification under the scheme. For more information on the SBSC visit All rights reserved. No part of this publication may be reproduced without the prior permission of SNIPEF. Copyright SNIPEF 2010 (adapted with kind permission of SELECT).

4 CONTENTS ITEM DESCRIPTION PAGE A. INTRODUCTION 6 1. BUILDING LEGISLATION Regulation 8 - Durability, Workmanship and Fitness of Materials 1.2 Regulation 9 - Standards Applicable to Construction 1.3 Regulation 10 - Standards Applicable to Demolition 1.4 Regulation 11 - Standards Applicable to the Provision of Services, Fittings and Equipment 1.5 Regulation 12 - Standards Applicable to Conversions 1.5 Building Standards Applicable to drainage, heating and Plumbing installations 2. REQUIREMENTS FOR BUILDING WARRANTS Building Warrant Requirements for Drainage/Heating/Plumbing/Electrical Work in New Buildings 2.2 Building Warrant Requirements for Drainage/Heating/Plumbing/Electrical Work in Existing Domestic Buildings 2.3 Building Warrant Requirements for Drainage/Heating/Plumbing/Electrical Work in Existing Non-Domestic Buildings 2.4 Buildings and work not subject to Building Regulations 3. ESSENTIAL REQUIREMENTS AND GUIDANCE Structure Notches, holes and chases 3.2 Fire Openings and service penetrations (fire stopping) Escape routes (obstructions) 3.3 Environment Surface water drainage Wastewater drainage Openings and service penetrations (prevention of water penetration) Facilities in dwellings Sanitary facilities Heating of dwellings Ventilation Combustion appliances 3.4 Safety Access within buildings Electrical safety Danger from Accidents 3.5 Noise Resistance to the passage of sound 3.6 Energy Insulation of pipes, ducts and vessels Heating and hot water systems

5 CONTENTS ITEM DESCRIPTION PAGE 4. CERTIFICATION Certification Practice 4.2 Completion of the Certificate of Construction (Drainage, Heating and Plumbing Installations) 4.3 Completion of the Scheme Checklist 4.4 Completion of Appropriate British Standard Certification 4.5 Certification of Work Not Carried Out by the Approved Body 5. APPENDICES 46 APPENDIX A - Sample Certificate of Construction APPENDIX B - Sample Scheme Checklist APPENDIX A - Sources of Information APPENDIX B - Explanation of numbered terms based on BSD definitions APPENDIX C - List of specific British Standards appropriate to drainage, heating and plumbing equipment and installations in BSD Technical Handbooks.

6 A. INTRODUCTION The purpose of this guide is to assist plumbing installers who, in accordance with the Building (Scotland) Act 2003, are registered in a scheme for Certification of Construction (Drainage, Heating and Plumbing Installations). Installers, known as Approved Bodies have a statutory duty to carry out the construction of drainage, heating and plumbing installations in accordance with the Standards required by the Building (Scotland) Regulations Each Approved Body must employ at least one registered Approved Certifier of Construction (Drainage, Heating and Plumbing Installations), who will be required to ensure that work carried out meets the relevant parts of the above requirements before signing and submitting each Certificate of Construction. Guidance on how to achieve the Standards set in the Regulations is given in the two Building Standards Division (BSD) Technical Handbooks (Domestic and Non-domestic). Each handbook has six sections: Section 1 Structure Section 2 Fire Section 3 Environment Section 4 Safety Section 5 Noise Section 6 Energy Each of the six sections consists of an introduction and guidance on the individual Standards within each section. Where any building contains both domestic and non-domestic use, it is a general principle that the more stringent of the two sets of recommendations should be used. This Guide contains the relevant changes incorporated in the Technical Handbooks up to April The requirements for plumbing and heating safety are given in Standard 4.9 of Section 4, however, there are a number of other Standards within the above sections that are of particular relevance to plumbing, drainage and heating installations. This guide provides details of these along with appropriate methods of compliance. This Guide applies to any drainage, heating or plumbing installation within the scope of the Scottish Building Regulations, including work for which a warrant is not required (see Section 2 of this guide). It should be noted that the normal method of compliance with the building standards is to follow the recommendations in the Scottish Building Standards Technical Handbooks. The guidance in these handbooks is not however mandatory and compliance with the standards can be achieved by other methods. These handbooks are available to view and download from the Building Standards web site at Note The superscript numbered terms(x) in this guide are explained in Appendix B. 6 SBSC

7 1. BUILDING LEGISLATION The following Building Regulations require to be observed during drainage, heating and plumbing installations carried out within the scope of these Regulations. Note The superscript numbered terms(x) in this guide are explained in Appendix B. 1.1 REGULATION 8 - DURABILITY WORKMANSHIP AND FITNESS OF MATERIALS Materials, fittings and components used in the construction of a building must be suitable for their purpose, correctly used or applied and sufficiently durable taking account of normal maintenance practices. 1.2 REGULATION 9 - STANDARDS APPLICABLE TO CONSTRUCTION Construction shall be undertaken so that the work complies with the requirements of Schedule 5 of the Building (Scotland) Regulations 2004, which in turn requires compliance with the essential requirements of the mandatory Building Standards. The Standards of particular relevance to drainage, heating and plumbing installations are listed in Table 1 below. Approved Certifiers must consider compliance of the installation with the Standards and any certificate issued must certify compliance with these Standards. Table 1: Building Standards covered by Certificates of Construction (Drainage, Heating and Plumbing installations) 20 Domestic Non-domestic Structure Fire Safety 2.2, 2.3, 2.4, , 2.2, 2.3, 2.4, 2.9 Environment 3.6, , 3.11, 3.12, 3.13, 3.6, 3.7, 3.10, 3.12, 3.17, 3.18, 3.19, 3.17, 3.18, 3.19, 3.20, 3.21, , 3.21, 3.22 Safety 4.5, 4.6, 4.8, , 4.7, 4.8, 4.9 Noise (if relevant) Energy 6.2, 6.3, 6.4, 6.7, , 6.3, 6.4, 6.7, 6.8 The relevant subjects covered by each of the above Building Standards are shown on page 9. The Approved Certifier of Construction for Drainage, Heating and Plumbing installations is required only to consider the Standards in Table 1 above. 1.3 REGULATION 10 - STANDARDS APPLICABLE TO DEMOLITION Demolition works all service connections must be properly sealed including removing or making safe the drainage, heating and plumbing services in the building under demolition, and its site. 1.4 REGULATION 11 - STANDARDS APPLICABLE TO PROVISION OF SERVICES Every service, fitting or item of equipment provided so as to serve a purpose of the regulations should be designed, installed and commissioned in such a way as to fulfil those purposes. Certificates must cover drainage, heating and plumbing installations as commissioned. 1.5 REGULATION 12 - STANDARDS APPLICABLE TO CONVERSIONS Certain changes of use or occupation are considered to be Conversions and as such are subject to Building Regulations. Conversions are explained in Regulation 4 and those to which the Regulations apply are listed in Schedule 2 to Regulation 4. The building warrant identifies whether the project is a Conversion. SBSC 7

8 1. BUILDING LEGISLATION For many Standards, Conversions must meet the full requirement of the appropriate Regulations, but for certain Standards it is only necessary that the building converted is improved as close to the full requirement as far as is reasonably practicable and no worse than before the Conversion. Of these, the Standards relevant to certification of drainage, heating and plumbing installations are identified in Table 2 below. Table 2: Building Standards relevant to Certification of Construction (Drainage, Heating and Plumbing) Drainage, Heating and Plumbing installations should be no worse than before and as close to full requirements as reasonably practicable Full level of requirements for the part to be Converted and to any other part of the original building affected by the work 20 Domestic Non-domestic Domestic Non-domestic Structure Fire Safety 2.2, , , , 2.3, 2.9 Environment 3.10, 3.15, , 3.15, , 3.7, 3.11, 3.12, 3.6, 3.7, 3.12, 3.13, 3.14, 3.17, 3.18, 3.14, 3.17, 3.18, 3.20, 3.21, , 3.21, 3.22 Safety 4.2, 4.3, , 4.3, , , 4.7 Noise (if relevant) Energy 6.2, 6.3, , 6.3, , , 6.8 For these Standards, the level of compliance and decision as to what is reasonably practicable is at the discretion of the Approved Certifier. The level of compliance may or may not be able to be determined from the building warrant. If an Approved Certifier is asked to certify work in cases of change of use or occupation that constitutes a Conversion but for which no warrant has been obtained, they should not certify the work. See Table 3 below for changes of use or occupation that constitute a Conversion. Table 3: Conversions: Changes of use or occupation that constitute a Conversion Changes in the occupation or use of: a building a building ancillary to a 14 dwelling a building a 20 domestic building a 16 residential building a residential building a building an exempt building (in terms of Schedule 1 to Regulation 3) a building a building To create a dwelling or dwellings or a part thereof To increase the area of human occupation Which alters the number of dwellings in the building To any other type of building To any other type of building Which alters the type or number of expected occupants of the building So that it becomes a residential building To a building which is not so exempt To allow public access where previously there was none To accommodate parts into an area of different occupation where previously it was no so occupied. 8 SBSC

9 1. BUILDING LEGISLATION Examples of changes of use or occupation of a dwelling which would constitute a Conversion would include the use of an attic space as a room or the use of an attached garage as a room. 1.6 BUILDING STANDARDS APPLICABLE TO DRAINAGE/HEATING/PLUMBING INSTALLATIONS Listed below are the parts of the Building Standards applicable to the construction of Drainage, Heating and Plumbing Installations given in Tables 1 and 2 of this chapter. Note The superscript numbered terms(x) in this guide are explained in Appendix B Structure Prevention of collapse (Notches, holes and chases) Fire 1 Compartmentation (Fire stopping) 2 Separation (Fire stopping) Structural protection (Protecting pad bearing structures) Cavities (Fire stopping) Means of escape (Obstruction of escape routes) Environment 15 Surface water drainage 21 Wastewater drainage Precipitation (Sealing of openings and service penetrations) Facilities in 14 dwellings (access and activity spaces) 8 Sanitary facilities (accessible bathrooms and shower rooms) Heating (Provision) Ventilation (Provision) Condensation Combustion Appliances safe operation (Not affected by mechanical ventilation) Combustion Appliances protection from combustion products Combustion Appliances relationship to combustible materials Combustion Appliances removal of products of combustion Combustion Appliances air for combustion Combustion appliances air for cooling Safety Access within Buildings (Obstructions) Stairs and ramps (Obstructions) Electrical safety (Compliance with appropriate standards) Electrical fixtures (Provision of socket-outlets) Aids to communication (Provision) Danger from accidents (Positioning of appliances/equipment) Danger from heat Noise Transmission of noise (Maintaining integrity of noise prevention measures) Energy Building insulation envelope (Maintaining energy conservation measures) Heating system (Provision of energy efficient control measures) Insulation of pipes, ducts, vessels (Maintaining energy conversation measures) Commissioning building services (To ensure optimum efficiency) Written information (Provided to occupier of building) SBSC 9

10 2. REQUIREMENTS FOR BUILDING WARRANTS INTRODUCTION a) Certain types of drainage/heating/plumbing work are subject to Building Regulations and require a Warrant such work can be certified under the Scheme for Certification of Construction. b) Certain types of work are subject to Building Regulations but exempt from the need for a Warrant. Such work should not be certified under the Scheme. c) Certain buildings are not subject to Building Regulations or Warrant requirements these buildings should not be certified under the scheme. The information below, which is based on Schedule 3 to Regulation 5, shows the Warrant requirements for drainage/heating/plumbing installation work in new and existing buildings covered by these Regulations. Also shown are examples of the buildings not subject to Building Regulations or Warrant requirements (see 2.4 on page 21). 2.1 NEW BUILDINGS (BUILDING WARRANT REQUIREMENTS FOR DRAINAGE, HEATING AND PLUMBING WORK IN NEW BUILDINGS) Type of work New 20 domestic buildings New non- 20 domestic buildings ( 24 house, 11 flat (subject to certain or 12 maisonette) exceptions see 2.4) The following drainage, plumbing Required for All Required for All heating and plumbing installations: Plumbing Work: - Sanitary pipework, appliances and fittings - Cold water supply / distribution pipework, fittings and valves - Hot water supply / distribution pipework, fittings and valves Drainage Work - 21 Wastewater drainage systems outside buildings Heating Work: - 6 Chimneys, 7 flues and hearths - Hot water storage systems - Fuel Storage e.g. LPG, woody biomass, oil etc - Renewable Technology e.g. Solar, Heat Pumps, CHP, Biomass etc - Heating Control Systems - Commissioning References to new buildings also include, for example, extensions to existing buildings and most conservatories. Schedule 3 to Regulation 5 indicates that work which increases the floor area of a building requires a building warrant to be issued. In such circumstances the full level of requirements of the relevant Building Standards are applicable for the extension or conservatory and any other part of the building affected by the work, e.g. interconnected smoke alarms may require to be installed in parts of the existing building which form part of the escape route. 10 SBSC

11 2. REQUIREMENTS FOR BUILDING WARRANTS 2.2 EXISTING DOMESTIC BUILDINGS Building (Scotland) Regulations 2004 Regulation 5, Schedule 3 Guidance on Plumbing Installation (1) (2) work not requiring a warrant DOMESTIC BUILDINGS WORK TO EXISTING BUILDINGS (3) House House Work Activity Type (4) Flat (up to 2 (3 storeys storeys) and above) REPAIRS AND REPLACEMENT Work associated with the replacement of a bath, shower, wash hand basin, WC or 1, 24 Not Required Not Required Not Required sink of the same general type (5) (5) (5) Work associated with the relocation (including replacement) of a bath, shower, 1, 12 Not Required Not Required Not Required wash hand basin, WC or sink within the same room Work associated with the replacement of a branch soil or waste pipe, where the 1, 12, Not Required Not Required Not Required sanitary facility is re-located within the 24 same room Work associated with the relocation of a bathroom, shower room, utility room or 1 Required Not Required Required kitchen to another part of the dwelling (7) NEW WORK Any work associated with the installation of a single sanitary facility (excluding a water closet, waterless closet or urinal) 1, 11 Not Required Not Required Not Required including any relevant branch soil or (6) (6) waste pipe Any work associated with the installation of a water closet, waterless closet or urinal 1, 11 Required Not Required Required including any relevant branch soil or waste pipe Plumbing work adversely affecting a 1 Required Required Required separating wall, e.g. recessed pipework Work associated with the formation of a new bathroom, shower room, kitchen or 1 Required Not Required Required utility room (7) SBSC 11

12 2. REQUIREMENTS FOR BUILDING WARRANTS House House Work Activity Type (4) Flat (up to 2 (3 storeys storeys) and above) REPAIRS AND REPLACEMENT Any work associated with replacement pipework, radiators, convector heaters or 1, 8 Not Required Not Required Not Required thermostatic controls to an existing system Any work associated with new pipework, radiators, convector heaters or thermostatic controls associated with either an existing 1, 8 Not Required Not Required Not Required system or a new combustion appliance installation not requiring a warrant (8) Replace existing unventilated hot water cylinder of same general type and standard 1, 24 Not Required Not Required Not Required no worse (more than 15 litres capacity) Install new unventilated hot water cylinder 1 Required Not Required Required (more than 15 litres capacity) Note 1 Works not requiring a building warrant under the terms of schedule 3 require, in all respects, to meet the requirements of the relevant regulations, except where falling within types 24 to 26, where works constituting replacements must be to a standard no worse that at present. Note 2 This guidance is intended to cover the indicated work activities only, a building warrant may be required for ancillary works. If the work activity is carried out at the same time as work requiring a warrant, the building warrant application should include all works. Note 3 Where indicated as not requiring warrant approval, this is on the proviso that no structural works to, or affecting, the roof, external walls or elements of structure, or works adversely affecting a separating wall/floor are to be carried out to facilitate the installation. Note 4 Building work type as referenced in schedule 3. Note 5 On condition that the work is to a standard no worse than at present. Note 6 Excluding work involving a wet-floor shower room. Note 7 Excluding works that are forming part of a conversion covered by schedule 2 to regulation 4 Note 8 See separate guidance for installation of combustion appliances. NOTE: Work that involves a change in the method of discharge of the wastewater drainage requires building warrant approval, for example, forming a connection to a public sewer in a system previously served by a septic tank. 12 SBSC

13 2. REQUIREMENTS FOR BUILDING WARRANTS Building (Scotland) Regulations 2004 Regulation 5, Schedule 3 Guidance on Combustion appliances and associated work not requiring a warrant (1) DOMESTIC BUILDINGS WORK TO EXISTING BUILDINGS (2) House House Work Activity Type (3) Flat (up to 2 (3 storeys storeys) and above) NEW AND REPLACEMENT BOILERS New gas combustion appliance, not more 1, 6 Not Required Not Required Not Required than 70kW net input (4) New gas combustion appliance, more 1, 6 Required Not Required Required than 70kW net input (4) New oil combustion appliance, not more 1, 6 Not Required Not Required Not Required than 45kW net input (4) New oil combustion appliance, more 1, 6 Required Not Required Required than 45kW net input (4) New solid fuel combustion appliance, not 1, 6 Not Required Not Required Not Required more than 50kW net input (4) New solid fuel combustion appliance, 1, 6 Required Not Required Required more than 50kW net input (4) Replacement gas appliance, not more than 1, 6 Not Required Not Required Not Required 70kW net input (5) (5) (5) Replacement oil appliance, not more than 1, 6 Not Required Not Required Not Required 45kW net input (5) (5) (5) Replacement solid fuel appliance 1, 24 Not Required Not Required Not Required (4) more than 50kW net input (6) (6) (6) Electrical work associated with boiler installation or replacement See separate electrical matrix CHIMNEYS / FLUE-PIPES Installation of new/replacement balanced 1, 7 Not Required Not Required Not Required flue serving a room sealed appliance Installation of new chimney or flue-pipe 1 Required Not Required Required Installation of a flue liner 1, 9 Not Required Not Required Not Required Alterations to existing chimney/flue-pipe 1 Required Not Required Required separating wall, e.g. recessed pipework Repairs to, or replacement of, existing 1, 24 Not Required Not Required Not Required chimney, flue-pipe outlet or terminal (6) (6) (6) HEARTHS New or replacement superimposed 1, 6, 24 Not Required Not Required Not Required hearth (i.e. non-constructional) (6, 7) (6) (6, 7) New constructional hearth not 1, 6 Required Not Required Required affecting the floor or wall structure SBSC 13

14 2. REQUIREMENTS FOR BUILDING WARRANTS House House Work Activity Type (3) Flat (up to 2 (3 storeys storeys) and above) FUEL STORAGE (when connected to a combustion appliance for space/water heating or cooking) (8) Installation of an LPG storage tank, including pipework connecting the tank to a 1, 6 Not Required Not Required Not Required combustion appliance with a net input rating of 70kW or less Work associated with refillable LPG cylinders serving space/water heating combustion 1, 10 Not Required Not Required Not Required appliance(s) or cooking facilities via fixed pipework Installation of a fixed oil storage tank with a capacity or more than 90 litres, including 1, 6 Required Not Required Required pipework connecting the tank to the combustion appliance Repairs to, or replacement of an LPG or oil 1, 24 Not Required Not Required Not Required storage tank, including associated pipework (6) (6) (6) Installation of an oil storage tank with a capacity of not more than 90 litres The building regulations do not cover work of this nature CENTRAL HEATING AND HOT WATER STORAGE ANCILLARIES Any work associated with a combustion appliance installation, e.g. pipework, 1, 8 Not Required Not Required Not Required radiators, convector heaters and thermostatic controls Note 1 Works not requiring a building warrant under the terms of schedule 3 require, in all respects, to meet the requirements of the relevant regulations, except where falling within types 24 to 26, where works constituting replacements must be to a standard no worse that at present. Note 2 Where indicated as not requiring warrant approval, this is on the proviso that no structural works to, or affecting, the roof, external walls or elements of structure, or works adversely affecting a separating wall/floor, are to be carried out to facilitate the installation. This guidance is intended to cover the indicated work activities only, a building warrant may be required for ancillary works. If the work activity is carried out at the same time as works requiring a warrant, the building warrant application should include all works. Note 3 Building work type as referenced in schedule 3. Note 4 Excluding works to a flue-pipe, chimney and/or constructional hearth. Note 5 On condition that the boiler complies with the current technical standards Note 6 If a replacement, on condition that the installation is to a standard no worse than at present. Note 7 Not applicable to solid fuel appliances having an output rating more than 50kW, oil-firing appliances with an output rating more than 45kW or gas-fired appliances having a net input rating of more than 70kW. Note 8 The installation of biomass storage should be discussed with the local authority verifier. 14 SBSC

15 2. REQUIREMENTS FOR BUILDING WARRANTS Building (Scotland) Regulations 2004 Regulation 5, Schedule 3 Guidance on Electrical work not requiring a warrant DOMESTIC BUILDINGS WORK TO EXISTING BUILDINGS (2) House House Work Activity Type (1) Flat (up to 2 (3 storeys storeys) and above) REPAIRS AND REPLACEMENT Re-wiring (2) 24 Required Not Required Required Electrical fixtures, e.g. luminaries 24 Not Required Not Required Not Required NEW WORK Electrical work affected by demolition or alteration of the roof, external walls or 1 Required Required Required elements of structure Electrical work adversely affecting a 1 Required Required Required separating walls, e.g. recessed sockets New power socket outlets 1 Required Not Required Required Mains operated fire alarm system 1 Required Not Required Required Electrical work to automatic opening 1 Required Not Required Required ventilators (including auto-detection) Electrically opened locks 1 Required Not Required Required Wiring to artificial lighting 1 Required Not Required Required Wiring to emergency lighting 1 Required Not Required Required Electrical work associated with sprinkler 1 Required Not Required Required system Electrical work associated with new 1 Required Not Required Required boiler (large) Electrical work associated with new 6 Not Required Not Required Not Required boiler (small) Electrical work associated with new 11, 12 Not Required Not Required Not Required shower Electrical work associated with new 13 Not Required Not Required Not Required extract fan Electrical work associated with new 6 Not Required Not Required Not Required extract fan Extra low voltage 22 Not Required Not Required Not Required Note 1 Building work type as referenced in schedule 3. Note 2 A building warrant is not required for rewiring where it is a repair or replacement works to a level equal to the installation (or part thereof ) being repaired or replaced. SBSC 15

16 2. REQUIREMENTS FOR BUILDING WARRANTS 2.3 EXISTING NON-DOMESTIC BUILDINGS Building (Scotland) Regulations 2004 Regulation 5, Schedule 3 Guidance on Plumbing Installation (1) (2) work not requiring a warrant NON-DOMESTIC BUILDINGS WORK TO EXISTING BUILDINGS (3) Work Activity Non-residential buildings with a storey or creating a storey, not more than 7.5m high Other non-domestic Type (5) No public Public buildings access (4) access (4) REPAIRS AND REPLACEMENT Work associated with the replacement of a sink, wash hand basin, shower, bath, 2, 24 Not Required Not Required Not Required WC, waterless closet or urinal of the same general type (6) (6) (6) Work associated with the relocation (including replacement) of a sink, bath, 2, 12 Not Required Not Required Not Required shower, wash hand basin, WC, waterless (7) (7) closet or urinal within the same room Work associated with the replacement of a branch soil or waste pipe, including 2, 12, Not Required Not Required Not Required where the sanitary facility is re-located 24 within the same room Work associated with the relocation of bathroom, shower room, utility room or 2 Not Required Required Required kitchen to another part of the building (7) NEW WORK Any work associated with the installation of a single sanitary facility (excluding a water closet, waterless closet or urinal) 2, 11 Not Required Not Required Not Required including any relevant branch soil or (7) (7) waste pipe Any work associated with the installation of a water closet, waterless closet or urinal 2, 11 Not Required Not Required Required including any relevant branch soil or waste pipe Plumbing work adversely affecting a 2 Required Required Required separating wall, e.g. recessed pipework Work associated with the formation of a new bathroom, shower room, kitchen, 2 Not Required Required Required utility room, staff toilets or staff washroom facilities 16 SBSC

17 2. REQUIREMENTS FOR BUILDING WARRANTS Work Activity Non-residential buildings with a storey or creating a storey, not more than 7.5m high Other non-domestic Type (5) No public Public buildings access (4) access (4) CENTRAL HEATING AND HOT WATER STORAGE ANCILLARIES (8) Any work associated with replacement pipework, radiators, convector heaters or 2, 8 Not Required Not Required Not Required thermostatic controls to an existing system Any work associated with new pipework, radiators, convector heaters or thermostatic controls associated with 2, 8 Not Required Not Required Not Required either an existing system or a new combustion appliance installation not requiring a warrant (8) Replace existing unventilated hot water cylinder of same general type and standard 2, 24 Not Required Not Required Not Required no worse (more than 15 litres capacity) Install new unventilated hot water 2 Not Required Required Required cylinder (more than 15 litres capacity) Note 1 Works not requiring a building warrant under the terms of schedule 3 require, in all respects, to meet the requirements of the relevant regulations, except where falling within types 24 to 26, where works constituting replacements must be to a standard no worse that at present. Note 2 This guidance is intended to cover the indicated work activities only, a building warrant may be required for ancillary works. If the work activity is carried out at the same time as work requiring a warrant, the building warrant application should include all works. Note 3 Where indicated as not requiring warrant approval, this is on the proviso that no structural works to, or affecting, the roof, external walls or elements of structure, or works adversely affecting a separating wall/floor, are to be carried out to facilitate the installation. Note 4 Non-residential buildings to which the public does not have access may include: offices, storage buildings, industrial buildings, e.g. factories and workshops, assembly and entertainment buildings not open to the public, e.g. some educational buildings and private members clubs. Non-residential buildings to which the public has access may include: assembly and entertainment buildings open to the public, e.g. community schools, pubs and clubs. Note 5 Building work type as referenced in schedule 3. Note 6 On condition that the work is to a standard no worse than at present. Note 7 Excluding work involving a wet-floor shower room. Note 8 See separate guidance for installation of combustion appliances. NOTE: Work that involves a change in the method of discharge of the wastewater drainage requires building warrant approval, for example, forming a connection to a public sewer in a system previously served by a septic tank. SBSC 17

18 2. REQUIREMENTS FOR BUILDING WARRANTS Building (Scotland) Regulations 2004 Regulation 5, Schedule 3 Guidance on Combustion appliances and associated work not requiring a warrant (1) NON-DOMESTIC BUILDINGS WORK TO EXISTING BUILDINGS (3) Work Activity Non-residential buildings with a storey or creating a storey, not more than 7.5m high Other non-domestic Type (5) No public Public buildings access (4) access (4) NEW AND REPLACEMENT BOILERS New gas combustion appliance, not more 2, 6 Not Required Not Required Not Required than 70kW net input (4) New gas combustion appliance, more 2, 6 Not Required Required Required than 70kW net input (4) New oil combustion appliance, not more 2, 6 Not Required Not Required Not Required than 45kW net input (4) New oil combustion appliance, more 2, 6 Not Required Required Required than 45kW net input (4) New solid fuel combustion appliance, not 2, 6 Not Required Not Required Not Required more than 50kW net input (4) New solid fuel combustion appliance, 1, 6 Not Required Required Required more than 50kW net input (4) Replacement gas appliance, not more than 2, 6 Not Required Not Required Not Required 70kW net input (5) (5) (5) Replacement oil appliance, not more than 2, 6 Not Required Not Required Not Required 45kW net input (5) (5) (5) Replacement solid fuel appliance 2, 24 Not Required Not Required Not Required (4) more than 50kW net input (6) (6) (6) Electrical work associated with boiler installation or replacement CHIMNEYS / FLUE-PIPES See separate electrical matrix Installation of new/replacement balanced 2, 7 Not Required Not Required Not Required flue serving a room sealed appliance Installation of new chimney or flue-pipe 2 Not Required Required Required Installation of a flue liner 2, 9 Not Required Not Required Not Required Alterations to existing chimney/flue-pipe 2 Not Required Required Required separating wall, e.g. recessed pipework Repairs to, or replacement of, existing 2, 24 Not Required Not Required Not Required chimney, flue-pipe outlet or terminal (6) (6) (6) HEARTHS New or replacement superimposed 2, 6, 24 Not Required Not Required Not Required hearth (i.e. non-constructional) (6) (6, 7) (6, 7) New constructional hearth not 2, 6 Not Required Required Required affecting the floor or wall structure 18 SBSC

19 2. REQUIREMENTS FOR BUILDING WARRANTS Work Activity Non-residential buildings with a storey or creating a storey, not more than 7.5m high Other non-domestic Type (5) No public Public buildings access (4) access (4) FUEL STORAGE (when connected to a combustion appliance for space/water heating or cooking) (8) Installation of an LPG storage tank, including pipework connecting the tank to a 2, 6 Not Required Not Required Not Required combustion appliance with a net input rating of 70kW or less Work associated with refillable LPG cylinders serving space/water heating combustion 2, 10 Not Required Not Required Not Required appliance(s) or cooking facilities via fixed pipework Installation of a fixed oil storage tank with a capacity or more than 90 litres, including 2, 6 Not Required Required Required pipework connecting the tank to the combustion appliance Repairs to, or replacement of an LPG or oil 2, 24 Not Required Not Required Not Required storage tank, including associated pipework (6) (6) (6) Installation of an oil storage tank with a capacity of not more than 90 litres The building regulations do not cover work of this nature CENTRAL HEATING AND HOT WATER STORAGE ANCILLARIES Any work associated with a combustion appliance installation, e.g. pipework, 2, 8 Not Required Not Required Not Required radiators, convector heaters and thermostatic controls Note 1 Works not requiring a building warrant under the terms of schedule 3 require, in all respects, to meet the requirements of the relevant regulations, except where falling within types 24 to 26, where works constituting replacements must be to a standard no worse that at present. Note 2 Where indicated as not requiring warrant approval, this is on the proviso that no structural works to, or affecting, the roof, external walls or elements of structure, or works adversely affecting a separating wall/floor, are to be carried out to facilitate the installation. This guidance is intended to cover the indicated work activities only, a building warrant may be required for ancillary works. If the work activity is carried out at the same time as work requiring a warrant, the building warrant application should include all works. Note 3 Building work type as referenced in schedule 3. Note 4 Excluding works to a flue-pipe, chimney and/or constructional hearth. Note 5 On condition that the boiler complies with the current technical standards Note 6 If a replacement, on condition that the installation is to a standard no worse than at present. Note 7 Not applicable to solid fuel appliances having an output rating more than 50kW, oil-firing appliances with an output rating of more than 45kW or gas-fired appliances having a net input rating of more than 70kW. Note 8 The installation of biomass storage should be discussed with the local authority verifier. Note 9 Non-residential buildings to which the public does not have access may include: offices, storage buildings, industrial buildings, e.g. factories and workshops, assembly and entertainment buildings not open to the public, e.g. some educational buildings and private members clubs. Non-residential buildings to which the public has access may include: assembly and entertainment buildings open to the public, e.g. community schools, pubs and clubs. SBSC 19

20 2. REQUIREMENTS FOR BUILDING WARRANTS Building (Scotland) Regulations 2004 Regulation 5, Schedule 3 Guidance on Electrical work not requiring a warrant NON-DOMESTIC BUILDINGS WORK TO EXISTING BUILDINGS (3) Work Activity Non-residential buildings with a storey or creating a storey, not more than 7.5m high Other non-domestic Type (5) No public Public buildings access (4) access (4) REPAIRS AND REPLACEMENT Re-wiring (2) 24 Not Required Required Required NEW WORK Electrical work affected by demolition or alteration of the roof, external walls or 2 Required Required Required elements of structure Electrical work adversely affecting a 2 Required Required Required separating walls, e.g. recessed sockets Electrical work adversely affecting a 2 Required Required Required loadbearing wall New power socket outlets 2 Not Required Required Required Automatic fire detection system 2 Not Required Required Required Electrical work to automatic opening 2 Not Required Required Required ventilators Electrical work to automatic fire dampers 2 Not Required Required Required Electrically opened locks 2 Not Required Required Required Wiring to artificial lighting 2 Not Required Required Required Wiring to emergency lighting 2 Not Required Required Required Outdoor luminous tube signs (4) 2 Not Required Not Required Not Required Electrical work associated with new 2 Not Required Required Required boiler (large) Electrical work associated with new 6 Not Required Not Required Not Required boiler (small) Electrical work associated with new 11, 12 Not Required Not Required Not Required shower Electrical work associated with new 13 Not Required Not Required Not Required extract fan Extra low voltage installations 22 Not Required Not Required Not Required 20 SBSC

21 2. REQUIREMENTS FOR BUILDING WARRANTS Note 1 Building work type as referenced in schedule 3. Note 2 Non-residential buildings to which the public does not have access may include: Existing offices Existing storage buildings Existing industrial buildings e.g. factories and workshops Existing assembly and entertainment buildings not open to the public e.g. some educational buildings and private members clubs Non-residential buildings to which the public has access may include: Existing assembly and entertainment buildings not open to the public e.g. community schools, pubs and clubs Note 3 A building warrant is not required for renewing where it is a repair or replacement works to a level equal to the installation (or part thereof ) being repaired or replaced. Note 4 Subject to the Town and Country Planning (Control of Advertisement) (Scotland) Regulations BUILDINGS AND WORK NOT SUBJECT TO BUILDING REGULATIONS Schedule 1 to Regulation 3 gives a description of Buildings and Services that are not subject to the Building Regulations. These are described under Types 1 to 21. It should be noted however that drainage, heating or plumbing work carried out in such buildings may be subject to other legislation such as Water Byelaws, Gas Safety Regulations etc. These building types in Schedule 1 are summarised as follows: Types 1 to 3 Buildings or work controlled by other legislation e.g. Manufacture and Storage of Explosives Regulations, Nuclear Installations Act, Historic Buildings. Type 4 Protective works e.g. building site works etc where the public are in close proximity but are protected. Types 5 to 6 Buildings not frequented by people e.g. detached buildings housing fixed plant only requiring intermittent visits. Types 7 to 8 Agricultural and related buildings e.g. commercial greenhouses, small single storey detached buildings used solely for this purpose. Types 9 to 12 Buildings or work which is so specialised that the Building Regulations are not appropriate e.g. civil engineering work, mobile homes etc. Types 13 to 15 and 17 to 20 Buildings or work sufficiently minor to have little or no impact on the public interest e.g. contractors huts, greenhouses, car ports, and very small buildings. Type 16 Temporary buildings e.g. due to certain restriction of time in use. Type 21 Paved areas up to 50 m 2 in area. SBSC 21

22 3. ESSENTIAL REQUIREMENTS AND GUIDANCE INTRODUCTION Plumbing and heating installers should observe the following requirements and guidance when undertaking a drainage/heating/plumbing installation which is within the scope of the Scottish Building Standards. Where any doubt exists regarding any of the following requirements the Approved Certifier should seek advice from the appropriate designer (structural engineer, architect, M & E consultant etc) employed on the project. Note The superscript numbered terms(x) in this guide are explained in Appendix B STRUCTURE Notches, Holes and Chases (Standard 1.1) Drilling holes through timber or masonry, cutting chases (raggles) in masonry or penetrating any part of a structure for the installation of cables, containment systems and equipment should be carried out in a manner that does not impair structural integrity. Points to note: Where there is any doubt about the structural integrity of any element of structure through which services are to pass or be accommodated, the advice of a structural engineer should always be sought. This applies particularly to timber beams. Existing holes and notches should only be used where appropriate. DETAILED GUIDANCE Timber frame walls Holes should be within the limits set out below: Holes should be drilled at the neutral axis; Holes should be at least 300mm apart. There should not be any notching of wall studs, *cripple studs or lintels. *cripple studs are the studs either side of an opening such as a door or window, to provide support for a lintel. Floor and flat roof joists Notches and holes in simply supported floor and flat roof joists of depth D should be within the following limits: a) holes should only be drilled at the neutral axis; and b) notches and holes should be at least 100mm apart horizontally; and c) notches may be at the top or bottom of a joist but not coinciding. 22 SBSC

23 3. ESSENTIAL REQUIREMENTS AND GUIDANCE Raised tie and collared roof members Notches and holes should not be cut in rafters, ties, collars or hangers. Trussed rafter members Members of trussed rafters should not be cut, trimmed, notched or otherwise altered. Wall Chases Chases (Raggles) should be within the following limits: Vertical chases should not be deeper than 1/3 of the wall thickness, or in cavity walls, 1/3 of the thickness of the leaf. Horizontal chases should not be deeper than 1/6 of the thickness of the wall or leaf. Chases should not impair the stability of a wall. Where hollow blocks are used, at least 15mm thickness of block should be retained. Care should be taken that chases on solid partition walls are not back to back FIRE Openings and Service Penetrations (Standards 2.1 to 2.4) Pipes, cables, containment systems or other items of equipment may penetrate 1 compartment walls or floors (normally provided in non-domestic buildings to prevent fire spread) or 2 separating floors and walls (normally provided between 14 dwellings or between a dwelling and another building or common 9 escape route). 3 Cavity barriers (provided to prevent fire spread in cavities) may also be affected. These openings and penetrations require to be protected from the effects of fire as described below. Points to note: Any of the above openings should be 4 fire-stopped to inhibit the spread of smoke or fire and maintain the effectiveness of the elements of structure. Pipes, wires or other services should not be installed in timber framed 2 separating walls. The walls and floors between an integral or adjoining garage and a dwelling are also considered to be 2 separating. The number of openings should be limited to as few and as small as possible. Guidance on fire-stopping is given below. Note The superscript numbered terms(x) in this guide are explained in Appendix B. DETAILED GUIDANCE 4 Fire-stopping As stated above, openings in fire resistant walls, floors and ceilings should be fire-stopped to prevent the passage of heat, smoke and toxic gas. Where minimal 22 differential movement is anticipated, either in normal use or during fire exposure, proprietary fire-stopping materials such as 5 intumescent mastics may be used. SBSC 23

24 3. ESSENTIAL REQUIREMENTS AND GUIDANCE The following materials are also considered appropriate: Cement mortar. Gypsum based plaster. Cement or gypsum based vermiculite/perlite mixes. Mineral fibre. Crushed rock and blast furnace slag. Ceramic based products (with or without resin binders). Where 22 differential movement is anticipated, proprietary sealants or sealing systems including 5 intumescent products tested for the appropriate fire resistance can be used. Materials used for fire stopping should be reinforced or supported with non-combustible materials where the unsupported span is more than 100 mm and non-rigid materials are used, unless field tests show that the materials used are satisfactory. To avoid problems however, the size of holes and ways should be kept to a minimum. Note: Gas supply system pipework passing through walls and floors must be sleeved, with the annular space between pipe and sleeve sealed at one end with a flexible fire resistant compound in accordance with the requirements of BS Note: For wiring systems passing through walls and floors which require 4 fire-stopping, Regulation from BS 7671: 2008 requires internal sealing of conduits, trunkings etc where the internal cross-sectional areas is greater than 710 mm 2 (e.g. 50mm x 50mm trunking). Intumescent pillows are normally used for this purpose Escape Routes (Standard 2.9) Every building must be constructed in such a way that in the event of a fire the occupants can escape before being affected by fire or smoke. The designed 9 escape routes should be identified on the plan of the building as this information is required for the building warrant. The BSD Procedural Handbook Section applies. It is essential that the Approved Certifier identifies these routes. Points to note: Drainage, heating or plumbing appliances/fitments should not obstruct or adversely affect the height or width of escape routes. Any drainage, heating or plumbing pipework within an escape stair or protected lobby should be sleeved and sealed in an appropriate fire resistant construction. DETAILED GUIDANCE For all buildings, minimum headroom of at least 2m (1.9m in doorways) must be maintained. The minimum width of corridors should also be considered with regard to access within buildings and is detailed in in this guide. For non-domestic buildings, escape route widths are given in Standard as follows: The unobstructed width of each individual escape route from a room or storey should be at least 1200mm. However: Where the room or storey is inaccessible to wheelchair users the width may be reduced to not less than 1100mm; and Where the occupancy capacity of the room or storey is not more than 100 and it is inaccessible to wheelchair users the width may be reduced to not less than 1000mm. 24 SBSC

25 3. ESSENTIAL REQUIREMENTS AND GUIDANCE ENVIRONMENT 15 Surface Water Drainage (Standard 3.6) Every building should be provided with a drainage system to remove rainwater from the roof, or other areas where rainwater might accumulate, without causing damage to the structure or endangering the health and safety of people in and around the building. Points to note: Where gutters and rainwater pipes are used, they should be constructed and installed in accordance with the requirements of BS EN : Gutters and rainwater pipes may be omitted from a roof of any height provided it has an area of not more than 8m 2 and no other area drains onto it. 15 Surface water run-off from domestic properties (including paved areas) should be via a properly constructed Sustainable Urban Drainage System (SUDS); an appropriately sized and constructed soakaway (located at least 5m from building and property boundary); a public sewer provided under the Sewerage (Scotland) Act 1968; and outfall to a watercourse (river, stream, loch or coastal waters) that complies with appropriate (Scottish Environmental Protection Agency (SEPA) requirements; a storage container with an overflow which discharges to any of the four previous options. Rainwater harvesting systems allow 15 surface water run-off from dwellings or hard-standing areas to be collected, processed, stored and distributed thereby reducing the demand for potable water and the load on drainage systems. Water collected from rainwater harvesting is likely to become contaminated during harvesting, so it is recommended that the water is only used for purposes such as flushing water closets, car washing or to supply garden taps. As dwellings generally have small rainwater catchment areas and it may not be environmentally or financially viable to install a rainwater harvesting system. Rainwater harvesting systems and 26 greywater systems both require the approval of Scottish Water before installation. Where traditional piped drainage systems are required as opposed to SUDS, these should be designed and constructed in accordance with the guidance in National Annex NE of BS EN 752-4:1998. DETAILED GUIDANCE Sustainable Urban Drainage Systems (SUDS) SUDS are made up of one or more structures built to manage the 15surface water run-off. They are used in conjunction with good management of the land to prevent pollution. There are four general methods of control: Filter strips and swales Filter drains and permeable surfaces Infiltration devices Basins and ponds Testing A 15 surface water drainage system should be tested to ensure the system has been properly laid and is functionally correct. Testing should be carried out in accordance with the guidance in BS EN 1610: Wastewater Drainage (Standard 3.7) 21 Wastewater systems operate essentially under gravity to remove waste water from dwellings to public sewers, sewage treatment works, septic tanks or private 21 wastewater treatment plants. SBSC 25