Warm Deck Flat Roof Construction

Introduction warm cold roofs this guidance offers guidance on the difference benefits between warm and cold roofs.

Warm deck flat roof construction.

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. This approach uses insulation with no air gap either immediately above or below the roof deck. Ventilation is required for these roofs. 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.

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. There are two main types of flat roof systems to choose from. 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.

In case of warm roofs they have an insulation above the roof deck in this way it keeps the deck warm. There are two forms of warm deck roof. 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. 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. Types of warm deck roof. Inverted warm deck roof. The warm deck roof design is the modern method for flat roof construction and is preferred wherever this option is possible.

The sandwich warm deck roof is the most common type of 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. 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. The insulation is placed below the waterproof covering and is either mechanically fixed or bitumen bonded on to the top of the deck.