Part B Materials and workmanship

1. Part BMaterials and workmanship Part CSite preparation and resistance to contaminants and moisture Claire Brown Castlereagh Building Control

2. Recognises the aims and objectives • of the EEA • Regulations re-numbered 22 – 24 • ● Introduction • ●Part B Regulations • ●Guidance – Performance and introduction to provisions • ●Section 1 General • ●Section 2 Fitness of materials and workmanship • ●Section 3 Urea formaldehyde foam • ●Appendix Publications referred to

3. Limitations • ● 23b limits the standards of materials and workmanship to be no more than necessary to secure the health, safety, welfare and convenience of persons in and about the building and further the conservation of fuel and power • Definition of material • Means any materials whether occurring naturally, recycled or manufactured, and includes products, components and fittings. • Ways of establishing the fitness of materials: • CE marking, British Standards, Technical Approvals, Other national & international technical specifications, Independent certification scheme, Tests & calculations, Past experience, Sampling. • Ways of establishing the adequacy of workmanship: • Standards, Technical approvals, Management systems, • Past experience, Tests.

4. CE Marking • The CE Marking Directive came into force on January 1995, and was implemented in the UK by the Construction Products (Amendment) Regulations 1994 • The relevant requirements are defined in relation to the Construction Products Directive of 1989 • mechanical resistance and stability, safety in case of fire, hygiene, health and environment, safety in use, protection against noise, energy economy, heat retention • Construction Products Regulation (CPR) • One of the key new additions to the Construction Products Regulation is a requirement on the • sustainable use of natural resources www.constructionproducts.org.uk

5. Sampling: • 2.10 A district council has the power to take • samples of materials used or to be used in • building work to establish if that material • complies with the provisions of the • Building Regulations (Regulation 16 Part A) • Tests: • 2.20 A district council has the power to require tests in accordance with regulation 15 in Part A of the Building Regulations, to be carried out in relation to drains and private sewers as necessary, to establish compliance with Part N of the Building Regulations .. .. • and .. may decide to carry out or arrange to have carried out such tests itself.

6. Summary: ● Part B – Applies across all parts of the Building Regulations ● Suitability & Standards of Materials and workmanship: ‘to be no more than necessary to secure the health, safety, welfare and convenience of persons in and about the building and further the conservation of fuel and power’ ● Building Control can where necessary request or take samples to ensure compliance ● New arrangement regarding construction products and CE Marking under Regulation EU no. 305/2011 will come fully into effect on 1st July 2013 – Part B will be again reviewed

7. Part C: Building Regulations 2012 Site preparation and resistance to ‘contaminants and’ moisture

8. Regulations 25-29 ● Application and interpretation ● Site preparation and resistance to contaminants ● Subsoil drainage ● Resistance to moisture and Weather ● Condensation N.B. Relevant definitions Reg 2 Part A of Building Regulations “Drain” “Dwelling” “Site” ● Introduction ●Part C Regulations ●Guidance – Performance and introduction to provisions ●Section 1 General ●Section 2 Site Preparation ●Section 3 Resistance to contaminants ●Section 4 Subsoil drainage ●Section 5 Floors ●Section 6 Walls ●Section 7 Roofs ●Section 8 Condensation ●Appendix Publications

9. Flood Risk Planning (NI) Order 1991 Regulate development in areas of flood risk PPS 15 – Planning & Flood Risk

10. www.dardni.gov.uk

11. Section 2 – Site preparation ● An appropriate site investigation should be carried out to determine the extent of site preparation work required ● BS 5930: 1999 – Code of practice for site investigations ● BRE Digests - to guide on site investigation ● Potential of contaminants may require a more comprehensive survey, i.e. combined geo-technical and geo-environmental investigation ● Copy of Site Investigation should be given to Building Control ● Unsuitable material: fill, turf, tree roots, existing foundations, services

12. Section 3 – Resistance to contaminants ● Contaminated site should be identified at planning stage ● Application of regulation 26(1) is based on the presumption that the area of land will be free from contaminants ● In exceptional circumstances Application of Regulation 26(1)(b) empowers the District Council to require the site to be remediated to a state suitable for the proposed development. Examples of contaminants and potential locationsare given in Tables 3.2 and 3.3 ● Radon also a contaminant but is enforced by Building Control

13. Section 3 – Resistance to contaminants Radon Affected Areas ●Maps are available as a free download: NIEA - Health Protection Agency Radon in Dwellings in N I : 2009 Review and Atlas www.ni-environment.gov.uk

14. Section 3 – Resistance to contaminants Limit the ingress of radon into – ● New dwellings ● All alterations and extensions to dwellings (including conservatories and porches) irrespective of size ● Any dwelling created as a result of a material change of use ● and to apply the requirement to avoid any harmful effect from contaminants to all material change of use cases

15. Section 3 – Resistance to contaminants • Guidance on protective measures are given in BR413 • Note: the following matters in BR 413 no longer apply • Radon Survey – now in paragraph 3.7 • Radon Maps – now in paragraph 3.7 • Colour of the maps – now shades of yellow to brown • New maps show NI divided into 1km grid squares

16. Section 4 – Subsoil drainage ● Provisions assume the site and surrounding ground are not subject to flooding ●Where water table can rise to within 250mm of lowest DPM of building or adversely affect the building there is a necessity to ‘Safeguard’ the building ●Where an existing active subsoil drain would pass under the building - re-laid under the building - re-routed around the building - redirected to another outfall ●Low lying buildings or basements

17. Section 5 – Floors Resistance to the passage of moisture from the ground ● Ground Supported Floors ● Suspended Timber Floors ● Suspended Concrete Ground Floors Section 6 – Walls ● Resistance to the passage of moisture from the ground in relation to internal walls and external walls – Dpc positioning and cavity trays ● Resistance to the passage of moisture from the weather

18. Section 7 – Roofs ● Resistance to the passage of moisture from the weather to inside the building ●Not be damaged by weather and not carry precipitation to any part of the building which could be damaged by it Section 8 - Interstitial condensation ●only dwellings ●Guidance BS 5250 – COP for control of condensation in buildings ●BRE Report BR 262 ●Thermal insulation : avoiding risks

19. Summary: • Applies to – • ● All new dwellings • ● All alterations and extensions to dwellings • (including conservatories and porches) • irrespective of size • ● Any dwelling created as a result of a • material change of use and apply the • requirement to avoid any harmful effect • from contaminants to all material change of • use cases • ● Site Reports • Contaminated Ground • Radon Maps • Flood Plains • ● Construction Detailing and Specification

20. Claire Brown Building Control Surveyor Castlereagh Borough Council