Pitched Roof Target U Value

U value requirement windows whole window u value 1 4 w m k.

Pitched roof target u value.

External walls cavity 0 55w m k external walls other not cavity 0 35w m k. We don t count the pitched roof as part of the house as we will insulate the floor of the loft. The u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation products. Ground floor underfloor heating 0 15w m k.

That the floor is a suspended timber floor. 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. Ground floor no underfloor heating 0 45w m k. Cold roof ceiling level 0 16w m k.

External doors windows rooflights curtain walling. These are expressed as a u value which needs to be achieved. U value requirement semi glazed doors 1 2 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.

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. Required area weighted average u value. U value requirement roof 0 13 w m k.

There are a few good u value calculators online that if you are short on time are worth checking out. For replacement or refurbished roofs. 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. New elements extension conversion for replaced or refurbished roofs.

U value requirement opaque doors 1 0 w m k. Pitched roof sloping ceilings. New elements extension conversion existing walls refurb new walls extensions new floors refurb existing floors extension ceiling level. Passive performance built in cavity system.

U values and air leakage levels determine space heating demand. The tables below show the suggested u values in england wales and scotland. According to the uk building regulations pitched roofs should achieve the u value of 0 18 w m2 depending on the circumstances.