How To Ventilate A Cold Flat Roof

This video shows the key features of a flat roof cold deck construction and how to draw the details to a scale of 1 10.

How to ventilate a cold flat roof.

I have a cold flat roof ventilated by soffit vents on one side and no ventilation on the other side. Connect the exhaust hose to the fan and then push it through the roof until the nozzle is entirely through. A cold roof really is colder than the rest of your home in the winter which means condensation is much less likely to develop. To ensure sufficient ventilation enough space must be provided to allow for the movement of air preventing the risk of condensation forming within the roof.

That means the rest of the roof is protected from heat. Their layer of insulation is beneath the roof decking and the roofing membranes. The glidevale technical team has co. How do i add ventilation on this side to create through air movement.

Building regulations state that a ventilation gap of at least 50mm must be in place between the insulation and the underside of the flat roof deck. On the unventilated side there is no overhang just a solid facia board flush with the wall. Ventilation for cold roofs. Here are the basics.

Why don t cold roofs need to be ventilated.