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Part A Img
  • Diagram A5 Room in roof

  • Diagram A4 Concrete slab on ground floor

  • Diagram A1 Masonry cavity wall

  • Diagram A2 Timber frame wall

  • Diagram A3 Domestic pitched roof

  • Diagram B1 Part L Insulation between and over joists

  • Diagram B2 Insulation between and below joists

  • Diagram B3 Insulation between and below rafters

  • Diagram B4 Insulation above and between rafters

  • Diagram B5 Timber flat roof,insulation between joists and below joists

  • Diagram B6 Sandwich warm deck flat roof above a concrete structure

  • Diagram B7 Inverted warm deck roof with concrete structure

  • Diagram B8 Cavity wall partial-fill insulation

  • Diagram B9 Cavity wall with full fill insulation

  • Diagram B10 Timber frame wall,insulation between framing timbers

  • Diagram B11 Hollow-block wall, internal insulation lining

  • Diagram B12 Concrete slab on ground floor,insulation under slab

  • Diagram B13 Concrete slab on ground floor, insulation under screed

  • Diagram B14 Suspended timber floor with quilt insulation

  • Diagram B15 Suspended timber floor with rigid or semi rigid board insulation

  • Diagram B16 Suspended reinforced concrete floor,internally insulated walls

  • Diagram B17 Suspended beam and block floor

  • Diagram B18 Exposed timber floor,Insulation between joists

  • Diagram B19 Exposed concrete floor external insulation

  • Diagram 1 Average Area Weighted Elemental U-values (Par. 1.3.2.2)

  • Diagram 2 Lintel, jamb and sill designs (Par. 2.1.3.3)

  • Diagram 3 Air infiltration measures (Par. 2.1.4.1)

  • Table A3 Typical resistance (Ru) for unheated space

  • Table A4 Typical resistance (Ru) for unheated space (b) unheated stairwells and access corridors in flats

  • Table A5 Typical resistance Ru) for unheated space (c) Conservatory-type sunroom

  • Table A1 Thermal conductivity of some common building materials

  • Table A2 Timber fractions for bridged Layers

  • Table B1 Indicative U-values for windows,doors and rooflight

  • Table C1 Reference Values

  • Table C1 Reference Values Ctd

  • Table D1 Cavity Wall insulation target u-values

  • Table D1 Cavity Wall insulation target u-values (contd)

  • Table D1 Cavity Wall insulation target u-values

  • Table D1 Cavity Wall insulation target u-values

  • Table D4 Timber Frame Construction targeted u values

  • Table D5 Steel Frame Construction targeted U Values

  • Table D6 Section 6 - Hollow Block Construction Target U Values

  • Table E1 Example Dwellings

  • Table E2 Example Dwelling - Results

  • Table 1 Maximum elemental U-value (W/m²K)¹,²

  • Table 2 Permitted variation in combined areas (Aope) and average -values (Uope) of external doors, windows and rooflights

  • Table 3 Minimum performance levels for mechanical ventilation systems

  • Table 4 Number of pressure tests per dwelling type

  • Table 5 Maximum elemental U value (W/m²K)¹,² for Material Alterations or Material Change of Use

  • Table 6 Permitted variation in combined areas (Aope) and average U-values (Uope ) of external doors, windows and rooflights

  • Table A3 Typical resistance (Ru) for unheated space

  • Table A4 Typical resistance (Ru) for unheated space (b) unheated stairwells and access corridors in flats

  • Table A5 Typical resistance Ru) for unheated space (c) Conservatory-type sunroom

  • Table A1 Thermal conductivity of some common building materials

  • Table A2 Timber fractions for bridged Layers

  • Table B1 Indicative U-values for windows,doors and rooflight

  • Table C1 Reference Values

  • Table C1 Reference Values Ctd

  • Table D1 Cavity Wall insulation target u-values

  • Table D1 Cavity Wall insulation target u-values (contd)

  • Table D1 Cavity Wall insulation target u-values

  • Table D1 Cavity Wall insulation target u-values

  • Table D4 Timber Frame Construction targeted u values

  • Table D5 Steel Frame Construction targeted U Values

  • Table D6 Section 6 - Hollow Block Construction Target U Values

  • Table E1 Example Dwellings

  • Table E2 Example Dwelling - Results

  • Table 1 Maximum elemental U-value (W/m²K)¹,²

  • Table 2 Permitted variation in combined areas (Aope) and average -values (Uope) of external doors, windows and rooflights

  • Table 3 Minimum performance levels for mechanical ventilation systems

  • Table 4 Number of pressure tests per dwelling type

  • Table 5 Maximum elemental U value (W/m²K)¹,² for Material Alterations or Material Change of Use

  • Table 6 Permitted variation in combined areas (Aope) and average U-values (Uope ) of external doors, windows and rooflights