Warm Deck Flat Roof Construction

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.

Warm deck flat roof construction.

Others would treat even steeper pitches as flat roofs. There are two forms of warm deck roof. In a warm flat roof construction the insulation is positioned above the structural deck and no ventilation is required. The membrane is then attached to the insulation.

Construction studies drawing detail showing how to draw a flat roof warm deck construction detail to a scale of 1 10 with a short introduction highlighting t. The insulation is placed below the waterproof covering and is either mechanically fixed or bitumen bonded on to the top of the deck. This approach uses insulation with no air gap either immediately above or below the roof deck. The sandwich warm deck roof is the most common type of flat roof.

Guidance advice on warm cold. 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. 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.

Ventilation is required for these roofs. An inverted roof construction sees the principal thermal insulation layer located above the roof structure and also above the waterproofing this method results in the waterproofing the structural deck and the support structure all being at a temperature similar to that of the interior of the building. In case of warm roofs they have an insulation above the roof deck in this way it keeps the deck warm. Types of warm deck roof.

The reasons for selecting either one will depend on the requirements of the build considering the level of insulation required heat loss and building regulations. When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off. Throughout the course of the year the roof deck and all below it is kept at a temperature close to that of the inside of the building therefore the roof structure is protected from extremes of hot and cold lessening the. Inverted warm deck roof.