Pitched Roof Target U Value

For replacement or refurbished roofs.

Pitched roof target u value.

U values and air leakage levels determine space heating demand. New elements extension conversion existing walls refurb new walls extensions new floors refurb existing floors extension ceiling level. U value requirement roof 0 13 w m k. Passive performance built in cavity system.

Pitched roof sloping ceilings. External doors windows rooflights curtain walling. Ground floor no underfloor heating 0 45w m k. External walls cavity 0 55w m k external walls other not cavity 0 35w m k.

Pitched roof with insulation between ceiling joists or between rafters determine the thickness of the insulation layer required to achieve a u value of 0 21 w m2k if insulation is between the joists and 0 26 w m2k if insulation is between the rafters. An advanced warm roof system of xtroliner sarking insulation that delivers the passive u value target of 0 15 w m k in a single layer avoiding thermal bridging and allowing for more effective membrane detailing. Cold roof ceiling level 0 16w m k. The u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation products.

The tables below show the suggested u values in england wales and scotland. Ground floor underfloor heating 0 15w m k. According to the uk building regulations pitched roofs should achieve the u value of 0 18 w m2 depending on the circumstances. There are a few good u value calculators online that if you are short on time are worth checking out.

New elements extension conversion for replaced or refurbished roofs. U value requirement semi glazed doors 1 2 w m k. Call us today visit our online store or contact us for assistance by email. Required area weighted average u value.

The required u value will depend on the location of the project england scotland or wales type of building domestic or non domestic and the application floor wall or roof. Improve your home insulation with our high quality insulation products. The quick free and easy way to find out the insulation thickness and the u value you need for your building project. We don t count the pitched roof as part of the house as we will insulate the floor of the loft.

That the floor is a suspended timber floor. U value requirement windows whole window u value 1 4 w m k. We assume that the occupants try to keep all the rooms at 20 c for 15 hours per day whilst the outside temperature is at zero 0 c.