Warm Deck Flat Roof

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Warm deck flat roof.

In a warm roof construction the principal insulation layer is placed above the structural decking resulting in the structural deck and support structure being at a temperature similar to that of the building interior. 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. Steve from london flat roofingexplains how warm flat roof construction works in this excellent short video. A warm deck roof is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation.

This results in the structural deck and its supports being at a temperature closer to that of the building s interior. The warm deck roof design is the modern method for flat roof construction and is preferred wherever this option is possible. A warm flat roof is formed by placing a layer of insulation over the top of the roof structure. The insulation is immediately below the waterproofing layer.

The vapour control layer is above the decking but below the insulation. Throughout the course of the year the roof deck and all below it is kept at a temperature close to that of the inside of. In a warm deck roof the insulation is positioned above the structural deck and no ventilation is required.