Pitched Roof U Value

U value requirement opaque doors 1 0 w m k.

Pitched roof u value.

A u value is a measure of heat loss in a building element such as a wall floor or roof. U value requirement semi glazed doors 1 2 w m k. Insulating above or above and between the roof timbers ensures that the structure is kept at or near the internal environmental conditions reducing thermal stress and condensation risk. If your home was built pre 1967 and has an old attic room or loft conversion a great way of achieving this level of insulation is through our specially designed eco roof.

This means that the higher the u value the worse the thermal performance of the building envelope. An uninsulated roof has a u value of approximately 2 5 w m2k however adding insulation can achieve a value of 0 18 w m2k. U value requirement roof 0 13 w m k. U value calculations to en iso 6946 xt pr insulation for pitched roofs.

These are expressed as a u value which needs to be achieved. There are a few good u value calculators online that if you are short on time are worth checking out. It can also be referred to as an overall heat transfer co efficient and measures how well parts of a building transfer heat. 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. Warm roof construction is a particularly effective way of insulating complex roofs.