What is a Cold Flat Roof?
By placing insulation below the roof and its supportive decking, we form a cold roof. For a cold roof construction the insulation is under the roof, so the roof and the roof timbers are cold. The makeup of a warm roof is like sleeping under your quilt i.e., all the timbers and the structure are in the warm therefore a warm roof.
Disadvantages of a Cold Flat Roof
The disadvantages of using a cold flat roof system are that it’s more expensive to build because of the need for additional ventilation. It’s also not thermally as good because there is thermal bridging through the joists.
Advantages of a Cold Flat Roof
The advantages of a cold roof is that it’s not so high as a warm roof. On a warm roof the insulation goes on top of all this area and the roof covering goes on top of that, so the advantages of a cold roof are that it’s not so deep in height and this helps us when we’re doing retrofit flat roof construction.
How a Cold Flat Roof Works
I’ve been working with Steve Dickinson of London Flat Roofing for almost 10 years and to this day I have not come across anyone with more knowledge on London flat roofs. From leak detection to maintenance, Steve has a wealth of knowledge in all aspects of flat roofing.
Our flat roof was previously installed by cowboy builders. Steve did a fantastic job or un-doing their shoddy work and rectifying all of the issues they had caused. No more leaks and no mess either. The price was fair and they got the job done very quickly.
I came back off holiday to find that the flat roof above my kitchen had been leaking and flooded the house. I called and spoke to Steve who came out the same day and within hours he had identified the leak. The very next day he sent out 2 roofers who fixed the leak. Steve then helped me claim through my insurance policy. Very pleased and grateful for his help.
Steve from London Flat Roofing was very knowledgeable. We had several contractors trying to find the issue with our leaking flat roof prior to getting Steve to look at it. After surveying it with a thermal imaging camera Steve was able to pinpoint the exact location of the leak and fixed it there and then. Very pleased and would definitely recommend to others.