Flat Warm Roof Construction Detail

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.

Flat warm roof construction detail.

Warm roof systems. Others would treat even steeper pitches as flat roofs. Details both in 2d and 3d to give a clear understanding. The 3 most common materials used for flat roof construction.

Flat roof details and information relating to insulating a flat roof. It must provide adequate protection against the elements keeping the buildings structure and interior dry. Flat roof types. 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 construction can come in the form of a warm roof or cold roof depending on the requirement of the owner and architect as they relate to the building regulations regarding heat loss and insulation. Depending on the type of roof you are considering here s some technical details you may find useful. There are several methods and materials for the design of the exterior surface of a warm or cold flat roof. The construction of the flat roof is similar to that of the timber upper floor.

This is placed over the. Warm roof build ups can be installed on most modern construction material types such as concrete timber and timber based sheets. In a warm flat roof construction the insulation is positioned above the structural deck and no ventilation is required. 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.

Types of flat roof construction warm and cold flat roofs. A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. 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. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls.

A flat roof must be strong durable and stable throughout its lifetime. For that reason cold flat roof construction needs to keep in mind the need for unblocked airflow. In case of warm roofs they have an insulation above the roof deck in this way it keeps the deck warm. Hot tar and gravel.