Venting A Cold Flat Roof

Link to sweating and mouldy new cold flat roof video https youtu be ll2 8rxsykc cold flat roof ventilation corrected this is a followup video on how to fix.

Venting a cold flat roof.

That means the rest of the roof is protected from heat. A cold roof really is colder than the rest of your home in the winter which means condensation is much less likely to develop. Air flow between vents will also be affected by the resistance to lateral flow. How do i add ventilation on this side to create through air movement.

On most flat roofs however stack effect will be ruled out since all vent openings will be at approximately the same level and there will generally be only small pressure differences from wind. Why don t cold roofs need to be ventilated. For cold flat roofs the vapour layer needs to be positioned underneath the insulation layer on top of the room below. Their layer of insulation is beneath the roof decking and the roofing membranes.