Flat Roof 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 roof warm roof construction detail.

This is placed over the. A flat roof must be strong durable and stable throughout its lifetime. 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.

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 case of warm roofs they have an insulation above the roof deck in this way it keeps the deck warm. Steve from london flat roofing explains how warm flat 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.

When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off. The major difference between the warm flat roof and the cold flat roof has to do with the air flow between the roofing timbers known as joists that help to hold up the roof. Details both in 2d and 3d to give a clear understanding. A warm flat roof is formed by placing a layer of insulation over the top of the roof structure.

A roof is defined in bs 6229 as a flat roof if it has a pitch of 10 degrees or less. Others would treat even steeper pitches as flat roofs. This enables the temperature of the structure and the deck to be kept close to the temperature of the inside of the building hence warm. If insulation is installed below the flat roof deck this is called a cold roof.

In the warm flat roof construction there is insulation packed into every possible space where air can flow. 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. Flat roof types. A note to consider before construction.

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. The membrane is then attached to the insulation. The insulation is tapered to provide a fall to the roof to enable water to. Types of flat roof construction warm and cold flat roofs.

Depending on the type of roof you are considering here s some technical details you may find useful.