How To Ventilate A Cold Flat Roof

If you are talking about a flat roof my answer to you is the same as the answer i gave h.

How to ventilate a cold flat roof.

Your two best options are spray foam insulation on the underside of the roof sheathing an installation which will require the ceiling to be removed at least partially or the installation of rigid foam on top of the existing sheathing. 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 the unventilated side there is no overhang just a solid facia board flush with the wall.

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. Ventilation for cold roofs. In a concrete deck for example this gap could be created by fixing 50x50mm timber battens at 600mm centres and attaching the insulation to underside of these battens. 2011 code of practice for control of condensation in buildings stipulates that there should be a ventilation gap between the insulation and the bottom of the flat roof deck of at least 50mm.

How do i add ventilation on this side to create through air movement. The glidevale technical team has co. I have a cold flat roof ventilated by soffit vents on one side and no ventilation on the other side. Why don t cold roofs need to be ventilated.

Their layer of insulation is beneath the roof decking and the roofing membranes.