How To Insulate A Flat Roof

Cold flat roof insulation.

How to insulate a flat roof.

To produce a hot roof rigid insulation is fitted outside above the weatherproofing. There are several different methods for insulating roofs and walls alike but with a flat roof you have to worry about water getting in. This is then covered with a further weatherproofing layer. Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation.

Lots of traditional flat roofs are of the cold roof construction type. Depending on the weather and usage of the roof during its lifespan the insulation board may still be in a good enough condition to re use when the time arrives to replace the roof itself. This may help with condensation but causes such a loss of heat that it has been banned in scotland. A great example of this is powerdeck f insulation board which is both rot resistant and highly durable.

The chances of water seepage with a slanted roof are less simply because water is designed to run off and does not. Due to a rewire i ve had to remove parts of the plasterboard ceiling and have found that there is no insulation in the roof i can see the roof deck and joists there is no vapour layer and the plasterboard is not foil backed. Warm flat roof insulation. Reduce extreme temperature fluctuations inside your home.

Although this photo doesn t depict the house in question it illustrates some of the challenges faced by flat roofed buildings. Insulating a flat roof presents a challenge even for experienced roofers and home builders. Hi i have a flat roof extension built in the 1970s. Why its important to insulate your flat roof.

However it is possible to insulate a flat roof at any time in which case it may be possible to replace the weatherproof layer at the same time to avoid problems in. They are hard to waterproof hard to maintain and hard to insulate. For today s purposes we will stick with the insulation issue. Cold roof a very bad idea.

Flat roof insulation cross section. Flat roofs have been a daunting task for contractors and homeowners alike since they were invented. Is a flat roof the problem. This means there is a vapour control layer in the ceiling and cross ventilation at the eaves or the top of the walls.