Flat Roof Warm Roof Construction Detail

Also known as the built up roof bur this type of flat roof features three or more layers of waterproof material mixed in an alternating fashion with hot tar and a layer of smooth stone like gravel.

Flat roof warm roof construction detail.

So what is warm flat roof construction. Warm roof build ups can be installed on most modern construction material types such as concrete timber and timber based sheets. A warm flat roof or a built up roof bur is one where all the insulation is above the joists deck making them part of the warm fabric of the building. A flat roof usually consists of the following.

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. Hot tar and gravel. The membrane is then attached to the insulation. Warm roofs in case of warm roofs they have an insulation above the roof deck in this way it keeps the deck warm.

On a basic level flat roof construction comes in the form of roofing timbers or joists as they are more commonly known or steels that are laid across two uprights walls in most cases. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. 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. Flat roof construction for residential.

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. The insulation is immediately below the waterproofing layer. A warm flat roof is formed by placing a layer of insulation over the top of the roof structure. The insulation can be adhered mechanically fixed or loose laid.

From there the flat roof system you choose will determine the materials you apply. Steve from london flat roofing explains how warm flat roof construction works in this excellent short video. They can be built up from profiled metal decks as the insulation selected would provide enough rigidity to span the open sections of such decks. 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.

The vapour control layer is above the decking but below the insulation.