Pitched Roof Target U Value

According to the uk building regulations pitched roofs should achieve the u value of 0 18 w m2 depending on the circumstances.

Pitched roof target u value.

For replacement or refurbished roofs. We don t count the pitched roof as part of the house as we will insulate the floor of the loft. External doors windows rooflights curtain walling. U value requirement windows whole window u value 1 4 w m k.

The u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation products. Ground floor no underfloor heating 0 45w 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. That the floor is a suspended timber floor.

U values and air leakage levels determine space heating demand. These are expressed as a u value which needs to be achieved. Ground floor underfloor heating 0 15w m k. Where not exempt a conservatory heated or unheated should be built to the same maximum u values as any other new work as listed in columns b and c of the table in clause 6 2 9 with the exception that glazing and framing elements forming the walls or roof of a conservatory are unlimited in area and should have a maximum area weighted average u value of 2 0w m 2 k and a maximum individual element u value of 3 3w m 2 k.

Passive performance built in cavity system. Improve your home insulation with our high quality insulation products. New elements extension conversion existing walls refurb new walls extensions new floors refurb existing floors extension ceiling level. Call us today visit our online store or contact us for assistance by email.

New elements extension conversion for replaced or refurbished roofs. Required area weighted average u value. External walls cavity 0 55w m k external walls other not cavity 0 35w m k. Cold roof ceiling level 0 16w m k.

There are a few good u value calculators online that if you are short on time are worth checking out. 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. The tables below show the suggested u values in england wales and scotland. U value requirement roof 0 13 w m k.

The quick free and easy way to find out the insulation thickness and the u value you need for your building project. 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. Pitched roof sloping ceilings.