Cold Flat Roof Vs Warm Flat Roof

Namely the insulation layers.

Cold flat roof vs warm flat roof.

Firstly there are two types of flat roof. Guidance advice on warm cold roofs www cncbuildingcontrol gov uk continuous 5mm gap at ridge. 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. Installing a warm roof can be extremely straight forward and simple to do.

A flat roof installation due to the warm air being held below the solid surface of the roof does not need to be ventilated. Your two main options for effective insulation of your property are a cold flat roof or warm flat roof design. 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. Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof.

It is more thermally efficient and despite its higher cost of construction lessens overall heating costs thus saving money over the long run. Cncd 053 v1 5 7 2019 0 cold deck flat roof the thickness of insulation required will vary depending on the material you decide to use and the manufacturer s specification. A warm roof is defined as being when the all or the majority of the insulation is above the joists or deck. A warm roof and a cold roof.

A warm roof has many benefits over a cold roof installation. What is a warm roof or a cold roof. On a flat roof this could be air in at. The breakdown warm roof vs cold roof.

There is no air. A ventilation gap usually. When we talk about a warm roof vs a cold roof what we re really talking about is the insulation of the flat roof. 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.

By majority the rule of thumb is that in a domestic house not flats approximately a third of. You create a warm roof or a cold roof simply by applying the layers of the roof in a different order.