Conservation of fuel and power: Approved Document L, Volume 2 — Buildings other than dwellings

O N L I N E V E R S I O N Regulation 43: Pressure testing 56 Intention 56 Section 7: Air permeability and pressure testing 57 Showing compliance and reporting pressure test results 58 Air pressure testing procedure 58 Regulations 44 and 44ZA and requirements L1(b)(iii) and L2(b): Commissioning 59 Intention 60 Section 8: Commissioning 61 Notice of completion 62 Air leakage testing of ductwork 62 Regulations 40 and 40A: Providing information 64 Intention 64 Section 9: Providing information 65 Operating and maintenance instructions 65 Additional information for new buildings 65 Additional information for work in existing buildings 66 Regulation 23(2) and requirement L1(a): Replacement of thermal elements and limiting heat gains and losses 68 Intention 69 Section 10: New elements in existing buildings, including extensions 70 General 70 New and replacement thermal elements 70 New and replacement windows, roof windows, rooflights and doors (controlled fittings) 70 Extension of buildings other than dwellings 71 Conservatories and porches 73 Regulation 23(1) and requirement L1(a): Renovating elements and limiting heat gains and losses 74 Intention 74 Regulations 6 and 22: Material change of use and change to energy status 75 Intention 76 Section 11: Work to fabric elements in existing buildings 77 General 77 Renovating thermal elements 77 Material change of use and change to energy status 79 vii Building Regulations 2010 Approved Document L Volume 2, 2021 edition O N L I N E V E R S I O N