5 Best Of How To Install A Warm Flat Roof Best Resolution Image. A 50mm air gap must be left above the insulation and allowance for venting must be made at roof. Installing a composite deck from DeckPlus on your flat roof not only offers a fantastic flooring option that is suited to all weather conditions but a flooring option that is easy to install and will last the test of time with warranties up to 30 years.
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. A vapour control layer must be used below the insulation. 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.
Frame the roof One important and perhaps not so obvious fact is that a flat roof is not actually flat.
Flat roof u-value 018 Wm2k2 Warm Deck Flat Roof The type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturers specifications. Due to the insulation being over the top of the roof the timber structure beneath is warm which is why the term Warm Roof is formed. Cure It GRP Roofing System. This means that the insulation should be highly resistant to water absorption for example an extruded polystyrene based product which will not be affected by.