Cold Flat Roof Ventilation

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.

Cold flat roof ventilation.

This is a long slender aluminum vent that has a larger cover that is a domed shape. Cold flat roof ventilation corrected this is a followup video on how to fix problems with cold flat roof ventilation. Ventilation for cold roofs. Why don t cold roofs need to be ventilated.

That means the rest of the roof is protected from heat. It has the shape of a mushroom once it is completely installed. However they help to not only stabilize the temperature within the roofing system and attic but also allow moisture to escape. The ventilation system required for a cold flat roof must be installed during the construction of the roof itself.

We have had long discussions with mbc about cold vs warm 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. We also have a parapet on a flat roof and the ventilation solution is not through the cladding but the design flows air over the parapet. The solution seems reasonable but we are definitely going to end up with a cold roof though not in the traditional sense.

Cold deck flat roof the thickness of insulation required will vary depending on the material you decide to use and the manufacturer s specification. Correcting ventilation in cold flat roofs isn t that easy if the flat roof and. In many cases cold roofs are used in storage spaces where there is no habitation occurring underneath. A ventilation gap usually 50mm should be.

A cold roof really is colder than the rest of your home in the winter which means condensation is much less likely to develop.