Flat Roof Warm Roof Construction Detail

A flat roof usually consists of the following.

Flat roof warm roof construction detail. The insulation is immediately below the waterproofing layer. The vapour control layer is above the decking but below the insulation. Waterproof membrane to prevent water penetrating the structure and interior of the building. 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.

Warm roofs 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. A roof is considered to be flat when it is of a slope of 1 5 o to the horizontal. 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.

Although flat roofs are cheaper to build than pitched roofs they have a shorter life span. So what is warm flat roof construction. Steve from london flat roofing explains how warm flat roof construction works in this excellent short video. Hot tar and gravel.

A warm flat roof is formed by placing a layer of insulation over the top of the roof structure. 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. Warm roof build ups can be installed on most modern construction material types such as concrete timber and timber based sheets. 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.

From there the flat roof system you choose will determine the materials you apply. 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 steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board.

The insulation can be adhered mechanically fixed or loose laid.