To use epdm for a warm deck flat roof construction solid closed cell roof insulation such as kingspan or celotex should be placed on top of the roof deck rather than in between the rafters.
Warm deck roof built up.
A warm flat roof or a built up roof bur is one where all the insulation is above the joists deck making them part of the warm fabric of the building.
The insulation is immediately below the waterproofing layer.
Inclined along the line of rafters warm roof or positioned within the roof structure to form an insulated void room in roof which can result in warm and cold roof areas.
In principle this keeps the structural deck usually trapezoidal steel or timber at more or less the same temperature as the inside of the building.
They can be built up from profiled metal decks as the insulation selected would provide enough rigidity to span the open sections of such decks.
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The insulation can be adhered mechanically fixed or loose laid.
Warm deck flat roofs can be constructed on most modern construction material types such as concrete timber and timber based sheets.
The vapour control layer is above the decking but below the insulation.
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