Conservation of fuel and power: Approved Document L, Volume 1 — Dwellings

O N L I N E V E R S I O N Regulation 43: Pressure testing 51 Intention 51 Section 7: Air permeability and pressure testing 52 Showing compliance and reporting pressure test results 52 Air pressure testing procedure 52 Regulations 44 and 44ZA and requirements L1(b)(iii) and L2(b): Commissioning 53 Intention 54 Section 8: Commissioning 55 Notice of completion 55 System specific guidance for commissioning 56 Regulations 40 and 40A: Providing information 57 Intention 57 Section 9: Providing information 58 Operating and maintenance instructions 58 Additional information for new dwellings 58 Additional information for work in existing buildings 59 Regulation 23(2) and requirement L1(a): Replacement of thermal elements and limiting heat gains and losses 60 Intention 60 Section 10: New elements in existing dwellings, including extensions 61 General 61 New and replacement fabric elements 61 Extension of a dwelling 62 Conservatories and porches 63 Regulation 23(1) and requirement L1(a): Renovating elements in existing dwellings and limiting heat gains and losses 64 Intention 64 Regulations 6 and 22: Material change of use and change to energy status 65 Intention 66 Section 11: Work to elements in existing dwellings 67 General 67 Renovating thermal elements 67 Material change of use and change to energy status 69 Building Regulations 2010 Approved Document L Volume 1, 2021 edition vii O N L I N E V E R S I O N