Pitched Roof Target 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.

Pitched roof target u value.

The u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation products. External walls cavity 0 55w m k external walls other not cavity 0 35w m k. Ground floor underfloor heating 0 15w m k. 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.

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. Pitched roof sloping ceilings. Required area weighted average u value. Passive performance built in cavity system.

U value requirement semi glazed doors 1 2 w m k. U values and air leakage levels determine space heating demand. U value requirement windows whole window u value 1 4 w m k. Ground floor no underfloor heating 0 45w m k.

According to the uk building regulations pitched roofs should achieve the u value of 0 18 w m2 depending on the circumstances. U value requirement opaque doors 1 0 w m k. That the floor is a suspended timber floor. 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.

Call us today visit our online store or contact us for assistance by email. We don t count the pitched roof as part of the house as we will insulate the floor of the loft. 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.

For replacement or refurbished roofs. New elements extension conversion existing walls refurb new walls extensions new floors refurb existing floors extension ceiling level. The tables below show the suggested u values in england wales and scotland. U value requirement roof 0 13 w m k.

These are expressed as a u value which needs to be achieved. 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. External doors windows rooflights curtain walling.