Warm Deck Roof Cold Deck Roof

A cold deck roof is where the insulation is placed between the joists rafters or in between the ceiling joists in the case of a pitch roof.

Warm deck roof cold deck roof.

However this also allows cold air to enter. Warm deck flat roof. This video will demonstrate how to install a cure it grp waterproofing system in a warm roof build up. This allows air to circulate.

This system is called warm deck insulation and eradicates the condensation and venting issues associated with the cold deck system. Ventilation is required for these roofs. A cold roof design usually leaves a 50mm gap between the top of the insulation and the roof deck above. Guidance advice on warm cold.

Fortunately these days there is a better form of insulation available for your flat roof. Provided the existing roof is in a good state of repair and has a suitable structure a warm deck overlay can be applied. It is universally recommended that cold deck flat roof construction should be avoided. Warm roof designs will make the entire structure of the building warm in order to avoid cold bridging an element of the building that allows heat or energy loss.

By moving the insulation to the outside of the structure the roof deck is effectively brought inside which results in a warm deck hence the name this removes the the possibility of condensation forming on the underside of the deck and eliminates damp. The layer of insulation is essentially placed outside of the roof. The solution warm deck insulation. Contrasted with the cold deck roof this construction has a much lower risk of condensation as the void will be of a comparable temperature to the roof.

The insulation in a warm deck roof is installed immediately below the roof membrane on top of the roof deck usually with a vapour control layer underneath the insulation. Warm roof insulation ensures the entire roof structure is insulated meaning a warm deck roof is more energy efficient than a cold roof. The breakdown warm roof vs cold roof. Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs.

Converting a cold flat roof into a modern warm deck roof can be surprisingly economical. The simplicity of a warm flat roof makes it one of the most popular designs providing an effective and easy way of insulating a building. This cold deck construction is considered problematic in the humid temperate climate of the uk where the effective ventilation of restricted roof voids may be impractical particularly in sheltered built up areas.