Venting A Cold Flat Roof

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.

Venting a cold flat roof.

That means the rest of the roof is protected from heat. Air flow between vents will also be affected by the resistance to lateral flow. Their layer of insulation is beneath the roof decking and the roofing membranes. I have a cold flat roof ventilated by soffit vents on one side and no ventilation on the other side.

Ventilating a flat roof on a warm flat roof the layer is installed underneath the insulation to stop moisture interacting with it through. How do i add ventilation on this side to create through air movement. A cold roof really is colder than the rest of your home in the winter which means condensation is much less likely to develop. For cold flat roofs the vapour layer needs to be positioned underneath the insulation layer on top of the room below.