Venting A Cold Flat Roof

How do i add ventilation on this side to create through air movement.

Venting a cold flat roof. On the unventilated side there is no overhang just a solid facia board flush with the wall. Why don t cold roofs need to be ventilated. 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. Their layer of insulation is beneath the roof decking and the roofing membranes.

Air flow between vents will also be affected by the resistance to lateral flow. 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. 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.