How To Insulate A Flat Roof

Flat roof insulation is most often carried out when some part of the roof needs to be replaced for other reasons for example when the weatherproof layer has started to leak.

How to insulate a flat roof.

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. Is a flat roof the problem. 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. This may help with condensation but causes such a loss of heat that it has been banned in scotland.

Lots of traditional flat roofs are of the cold roof construction type. This means there is a vapour control layer in the ceiling and cross ventilation at the eaves or the top of the walls. There are several different methods for insulating roofs and walls alike but with a flat roof you have to worry about water getting in. Why its important to insulate your flat roof.

The chances of water seepage with a slanted roof are less simply because water is designed to run off and does not. To produce a hot roof rigid insulation is fitted outside above the weatherproofing. Although this photo doesn t depict the house in question it illustrates some of the challenges faced by flat roofed buildings. For today s purposes we will stick with the insulation issue.

Hi i have a flat roof extension built in the 1970s. Flat roofs have been a daunting task for contractors and homeowners alike since they were invented. An atlanta architect is looking for the best way to insulate the flat roofs he often includes in his designs for contemporary houses. Warm flat roof insulation.

Flat roof insulation cross section. Cold roof systems are highly inadvisable as insulation from the inside will inevitably lead to the formation of condensation. This is then covered with a further weatherproofing layer. They are hard to waterproof hard to maintain and hard to insulate.

A great example of this is powerdeck f insulation board which is both rot resistant and highly durable. Insulating a flat roof presents a challenge even for experienced roofers and home builders. 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. 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.