Insulating A Flat Roof From Inside

While insulation for a flat roof is expensive and can account for as much as 25 of the total installation cost there are a number of important benefits to having it in place.

Insulating a flat roof from inside.

Achieving a u value of 0 20w m meaning your roof will be better insulated than your walls will need 120mm thickness of rigid foam or 200mm of mineral wool or natural insulation. The type that is right for your flat roof insulation job depends upon the state of the roof expert opinion on the best type and your budget. Reduce extreme temperature fluctuations inside your home. Cold flat roof insulation.

To produce a hot roof rigid insulation is fitted outside above the weatherproofing. I ve built a timber frame to support a new plasterboard ceiling below the existing one. This is then covered with a further weatherproofing layer. Different types of roofing insulation exist including blanket insulation blown insulation and rigid insulation.

Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation. I want to insulate below a flat roof without removing the existing ceiling. This may help with condensation but causes such a loss of heat that it has been banned in scotland. At least 100mm of rigid board insulation must be positioned on top of the vapour control layer the vapour control layer stops any moisture within the building.

Cold roof a very bad idea. Flat roof insulation energy saving trust flat roof insulation fasteners flat roof insulation fiberglass flat roof insulation fixings flat roof insulation. With a flat roof however this becomes a major concern. When you have an un insulated roof you have to live with.

Lots of traditional flat roofs are of the cold roof construction type. One of the main benefits you will receive from installing a warm flat roof is condensation will not become an issue because of the positioning of the insulation. With a flat roof this issue does not arise but the u value constraint and the amount of insulation needed is just the same. Because most flat roofs don t have an attic crawl space or venting the insulation must go underneath the roof s covering on the exterior of the home or be placed on the inside of the home.

The existing ceiling is sound but provides no insulation. There is only a small gap between this ceiling and a concrete roof cold roof felt covered.