Warm Flat Roof Construction Uk

Different materials are used in the construction of a roof but usually the finishing is done by using roof tiles.

Warm flat roof construction uk.

The pitch of the roof is decided based on the weather conditions. This option avoids the requirement to ventilate the roof. A roof is primarily designed to keep out rain and snow including wind driven spray from a building. To use epdm for a warm deck flat roof construction solid closed cell roof insulation such as kingspan or celotex should be placed on top of the roof deck rather than in between the rafters.

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. Steve from london flat roofing explains how warm flat roof construction works in this excellent short video. 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. A vapour control layer must be used below the insulation.

Warm deck flat roofs can be constructed on most modern construction material types such as concrete timber and timber based sheets. Guidance advice on warm cold roofs www cncbuildingcontrol gov uk. Covers flat roof materials and flat roof construction of warm and cold roofs. The insulation is placed below the waterproof covering and is either mechanically fixed or bitumen bonded on to the top of the deck.

The sandwich warm deck roof is the most common type of flat roof. An architect makes the usual decision of the pitch. Types of flat roof construction warm and cold flat roofs. 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.

So what is warm flat roof construction. This is placed over the. Constructing a flat roof using epdm. What is a roof.

A warm flat roof is defined by where the roof insulation is installed which is always above the roof deck. A 50mm air gap must be left above the insulation and allowance for venting must be made at roof perimeters. A typical roof pitch in the uk for a traditional house will be 40 50 but at most it can go up to 70. The insulation is immediately below the waterproofing layer.

This is where the insulation is typically packed between the rafters. A warm flat roof is formed by placing a layer of insulation over the top of the roof structure. This approach uses insulation with no air gap either immediately above or below the roof deck. 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.

Part 4 flat roof construction. As compared with a traditional flat roof installation this approach maintains a temperature within the roof area similar to that of the rest of the building interior.