Warm Deck Flat Roof Construction

Ventilation is required for these roofs.

Warm deck flat roof construction.

Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs. When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off. It is usually the most acceptable type of construction for domestic possessions and belongings as it avoids the need for aeration of the roof construction. In a warm flat roof construction the insulation is positioned above the structural deck and no ventilation is required.

Others would treat even steeper pitches as flat roofs. The insulation is placed below the waterproof covering and is either mechanically fixed or bitumen bonded on to the top of the deck. 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. Inverted warm 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. The warm deck roof design is the modern method for flat roof construction and is preferred wherever this option is possible. 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. There are two forms of warm deck roof.

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. The membrane is then attached to the insulation. 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.

Types of warm deck roof. There are two main types of flat roof systems to choose from. This approach uses insulation with no air gap either immediately above or below the roof 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.