Warm Deck Flat Roof Detail

Others would treat even steeper pitches as flat roofs.

Warm deck flat roof detail.

A warm flat roof is formed by placing a layer of insulation over the top of the roof structure. That will help you remember certain factors and details to build the best possible flat roof. Flat roof details and information relating to insulating a flat roof. The definition of a flat roof according to bs 6229 is having a pitch less than 10 o to the horizontal however some in the industry would consider up to 15 o as their definition of a flat roof.

Having a manual for warm flat roof construction with details and a summary of rules to follow helps. So called because the insulating layer is located above the roof rafters and between the structural supports a warm deck roof results in a temperature for the roof and loft area that is consistent with the rest of the. The warm deck roof design is the modern method for flat roof construction and is preferred wherever this option is possible. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.

Flat roof u value 0 18 w m2k 2 warm deck flat roof the type of insulation for this is usually of a rigid type and the thickness will vary depending on the manufacturer s specifications. Due to the insulation being over the top of the roof the timber structure beneath is warm which is why the term warm roof is formed. Types of warm deck roof. Steve from london flat roofing explains how warm flat roof.

Warm roof deck sandwich roof warm roof systems benefit from the insulation sitting above the deck. So what is warm flat roof construction. Depending on the type of roof you are considering here s some technical details you may find useful. There are two forms of warm deck roof.

It can be difficult to provide a very high level of thermal performance in these roof types whether you re looking to insulate at joist level for a cold roof where joist depth can be an issue or above the roof deck where overall roof height may need to be considered if a warm roof construction is desired. This is placed over the. This enables the temperature of the structure and the deck to be kept close to the temperature of the inside of. The insulation is placed below the waterproof covering and is either mechanically fixed or bitumen bonded on to the top of the deck.

When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off.