Warm Deck Flat Roof Design

Warm flat roof designs.

Warm deck flat roof design.

The warm deck roof design is the modern method for flat roof construction and is preferred wherever this option is possible. In this article we discuss the pros and cons of both roof designs. On flat roofs a warm roof is one in which the insulation layer is laid on top of roof structure. Flat roof design guide.

Traditionally flat roofs simply consisted of a structural timber deck with a waterproof covering directly applied to the top of the deck. 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 recognised flat roof build ups for best design practices are. In the case of a flat roof insulation is usually either a rigid board above the deck or a mineral glass wool quilt immediately above the underdrawn ceiling depending on the type of roof design and construction.

This results in the structural deck and its supports being at a temperature closer to that of the building s interior. Where a cold flat roof does incorporate insulation this is in the form of mineral wool. This is as opposed to a cold roof in which the insulation is below or within the roof. There are three recognised designs of flat roof construction.

It is most important to note the vapour barrier must be a continuous vapour barrier with no puncture points. This design dates back many years and flat roof insulation was somewhat of an afterthought with this type of roof. In the case of a flat roof insulation is usually in the form of either a rigid board above the deck or a fibrous quilt immediately above the ceiling depending on the type of roof construction.