Link to
Flat roof mould video
   • Flat roof mould and bad ventilation i...  

Its only week two of 2020 and this is the second customer to email me over photos of a new cold flat roof sweating.
Luckily for this house owner, he had spotted the problem and stopped work. Like usual, the problems with the cold flat roof installation was not understanding just how a cold flat roof works and how important the ventilation and the vapour control layer is to form a cold flat roof.
The light fittings had been cut through the insulation and were venting into the vented space above. Not only this but large areas of the cold roof vented space was dead meaning that there is no through ventilation. Though ventilation is one of the most critical parts of the construction of a cold roof.
Using the foil on solid roof insulation is not a good thing even though the roofing insulation manufacturers sys you can when asked.
My video to Flat roof mould above shows how this was tried and how it failed.
Generally speaking, we are now seeing bad workmanship in construction in all sectors. The roofing world is starting to wake up to its responsibility for training however they are focusing on roofing only and are not training new roofers in how to install the insinuation to the roof. Insulating a roof is not just the builder's job but also the roofer's job especially if the work is retrofit as there probably won't be a builder onsite and the main contractor will be the roofer.


#londonflatroofing
#roofsurveyor
#coldflatroof
Steven Dickinson 

London flat roofing 

07802300099
@donflatroofing.co.uk