TGD F 2009 – 1.2.2.6 – Purge Ventilation Windows (habitable rooms)
1.2.2.6 For a hinged or pivot window that opens 30º or more, or for sliding sash windows, the height multiplied by the width of the opening part should be at least 1/20th of the floor area of the room. For a hinged or pivot window that opens between 15º and 30º, the height multiplied by […]
TGD L 2011 – 2.1.1.2 – BUILDING FABRIC General
2.1.1.2 This Part of the Building Regulations applies to the replacement of external doors, windows, or rooflights in an existing building. The average U-value of replacement units should not exceed the value of 1.6 W/m2K set out in Table 5. In this context, the repair or renewal of parts of individual elements, e.g. window glass, […]
TGD L 2008 – 1.2.3.3 – ELEMEnTAL hEAT LOSS METhOD
1.2.3.3 In applying Table 3 to an extension to an existing building, the relevant wall and roof areas may be taken to be: (a) the combined areas for the existing building and extension; in this case the combined area of external door and window openings refers to the area of such openings in the extended […]
TGD L 2008 – 1.2.3.3 – ELEMEnTAL hEAT LOSS METhOD
1.2.3.3 In applying Table 3 to an extension to an existing building, the relevant wall and roof areas may be taken to be: (a) the combined areas for the existing building and extension; in this case the combined area of external door and window openings refers to the area of such openings in the extended […]
TGD L 2008 – 1.2.1.4 – hEAT LOSS – GEnERAL
1.2.1.4 This Part of the Building Regulations applies to the replacement of external doors, windows, or rooflights in an existing building. The average Uvalue of replacement units should not exceed the value of 2.2 W/m2K. The limitations on opening areas set out in Table 3 do not apply. In this context, the repair or renewal […]
TGD L 2008 – 1.2.1.4 – hEAT LOSS – GEnERAL
1.2.1.4 This Part of the Building Regulations applies to the replacement of external doors, windows, or rooflights in an existing building. The average Uvalue of replacement units should not exceed the value of 2.2 W/m2K. The limitations on opening areas set out in Table 3 do not apply. In this context, the repair or renewal […]
TGD L 2008 – 1.2.3.2 – ELEMEnTAL hEAT LOSS METhOD
1.2.3.2 The combined area of window, door and rooflight openings should not exceed the values given in Table 3 when the average U-value is 2.2 W/m2K. However, this area may be varied provided the total heat loss through these elements is not increased. The area of openings provided should take account of the level of […]
TGD L 2008 – 1.2.3.2 – ELEMEnTAL hEAT LOSS METhOD
1.2.3.2 The combined area of window, door and rooflight openings should not exceed the values given in Table 3 when the average U-value is 2.2 W/m2K. However, this area may be varied provided the total heat loss through these elements is not increased. The area of openings provided should take account of the level of […]
TGD L 2011 – 2.1.2.4 – BUILDING FABRIC Fabric insulation
2.1.2.4 For extensions, the maximum areaweighted average U-value for doors, windows and rooflights of 1.60 W/m2K given in Table 1 applies when the combined area of external door, window and rooflight openings equals 25% of floor area. However, both the permitted combined area of external door, window and rooflight openings and the maximum area-weighted average […]
TGD L 2011 – 1.3.2.4 – Fabric insulation
1.3.2.4 The maximum area-weighted average U-value for doors, windows and rooflights of 1.6 W/m2K given in Table 1 applies when the combined area of external door, window and rooflight openings equals 25% of floor area. However, both the permitted combined area of external door, window and rooflight openings and the maximum area-weighted average U-value of […]