On the unventilated side there is no overhang just a solid facia board flush with the wall.
Venting a cold flat roof.
For cold flat roofs the vapour layer needs to be positioned underneath the insulation layer on top of the room below.
I have a cold flat roof ventilated by soffit vents on one side and no ventilation on the other side.
That means the rest of the roof is protected from heat.
How do i add ventilation on this side to create through air movement.
Why don t cold roofs need to be ventilated.
Their layer of insulation is beneath the roof decking and the roofing membranes.
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.