Cold Flat Roof Vs Warm Flat Roof

There is no air.

Cold flat roof vs warm flat roof.

A warm roof and a cold roof. Namely the insulation layers. 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. The roof itself is therefore kept warm.

Installing a warm roof can be extremely straight forward and simple to do. What is a warm roof or a cold roof. 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.

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. 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. By majority the rule of thumb is that in a domestic house not flats approximately a third of. Your two main options for effective insulation of your property are a cold flat roof or warm flat roof design.

Firstly there are two types of flat roof. A cold flat roof insulation requires more work taking off old boards and replacing them and the roof surface. Basically there are two options to choose from when insulating a flat roof. A warm roof has many benefits over a cold roof installation.

Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof. On a flat roof this could be air in at. A warm roof is defined as being when the all or the majority of the insulation is above the joists or deck. A flat roof installation due to the warm air being held below the solid surface of the roof does not need to be ventilated.

You create a warm roof or a cold roof simply by applying the layers of the roof in a different order. Guidance advice on warm cold roofs www cncbuildingcontrol gov uk continuous 5mm gap at ridge.