Warm Roof Vs Cold Roof Flat

A warm roof has many benefits over a cold roof installation.

Warm roof vs cold roof flat.

Ventilated cold roof or warm roof with insulation boards atop sheathing which serves to raise the dew point above the structural members of the roof. The breakdown warm roof vs cold roof a cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface. Instead the attic has insulation on the floor that separates air between the conditioned and attic spaces. Whilst cold flat roofs were the most commonly used method of insulation changes in the way we live increased time spent inside an increase in internal washing and cooking areas meant that the additional water vapour needed to be addressed.

Our original design actually called for a hybrid with a vapor membrane beneath the rafters then 5 5 of roxul batts in the rafters below the sheathing and then roxul insulation boards atop. Namely the insulation layers. Basically the term cold roof refers to a traditional roof or vented roof while hot roof refers to a roof that is not ventilated and which has foam insulation attached directly to the roof sheathing. In a cold roof the insulation is applied between the rafters but in a warm roof the insulation is applied on top of the existing roof surface.

However it must be pointed out that a cold roof requires more work and isn t as thermally efficient as a warm one. A warm roof is much more straightforward to install and provides a superior thermal performance and is therefore more costly. It is more thermally efficient and despite its higher cost of construction lessens overall heating costs thus saving money over the long run. The thermal efficiency isn t as good as with warm roof insulation.

Your two main options for effective insulation of your property are a cold flat roof or warm flat roof design. There is no air space between the roof and the warm air thus there is no condensation. A cold roof implies that the attic is not within the conditioned space of the home. The breakdown warm roof vs cold roof there are pros and cons to both a warm roof and a cold roof.

A warm deck roof is much easier to install offers great thermal performance but adds height to the flat roof. For this type of roof you ll need to have proper soffit vents a ridge or gable vent and ventilation baffles. A warm roof is much easier to install offers great thermal performance and can also add height to the flat roof. A cold roof is best when you re initially creating a flat roof and is cheaper than a warm roof but does provide an inferior thermal performance.

Cold roof construction requires that a suitable ventilated air space exists above the insulation layer within which the air is constantly mobile being replenished by fresh incoming air whilst the air resident within the void space is being expelled via a natural vent action at another point.