Can you clarify the requirement in AD L1B table A1 for 250mm mineral/cellulose fibre quilt to provide a thermal value of 0.16 W/m2K for pitched roof construction?
A. The entry in Table A1 refers to “quilt laid between and across”, which means that there are at least two layers of insulation and that there should be 150 mm insulation on top of the joists to minimise the thermal bridging effect. If the thermal conductivity of the mineral wool is 0.04 W/(mK), the overall U-value of the roof should meet the target value of 0.16. If the thermal conductivity is higher (0.044 W/(mK), it is necessary to increase the thickness of the second layer to 170 mm. Manufacturers may be erring on the side of caution in some cases.
Related Questions
- Is there a requirement that a surface be installed, such as a table or holder, for the placement of alcoholic beverages in washrooms that are included as limited licensed areas of establishments?
- Can you clarify the requirement in AD L1B table A1 for 250mm mineral/cellulose fibre quilt to provide a thermal value of 0.16 W/m2K for pitched roof construction?
- Is there a minimum betting requirement to be rated for Table Games?
