How To Construct A Warm Deck Flat Roof

When building a flat roof it is vital that a degree of falls is built into the construction to ensure rainwater run off.

How to construct a warm deck flat roof.

So called because the insulating layer is located above the roof rafters and between the structural supports a warm deck roof results in a temperature for the roof and loft area that is consistent with the rest of the. In case of warm roofs they have an insulation above the roof deck in this way it keeps the deck warm. 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. To build a flat roof you ll want to have a thorough understanding of how the process of constructing the flat roof works and the different methods available.

In a warm flat roof construction the insulation is positioned above the structural deck and no ventilation is required. Others would treat even steeper pitches as flat roofs. A vapour control layer must be used below the insulation. This approach uses insulation with no air gap either immediately above or below the roof deck.

The concrete deck can offer greater speed of roof construction which is an important consideration on many larger commercial projects. A 50mm air gap must be left. 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. 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.

This is where the insulation is typically packed between the rafters. That will help you remember certain factors and details to build the best possible flat roof. The warm deck roof design is the modern method for flat roof construction and is preferred wherever this option is possible. This option avoids the requirement to ventilate the roof.

To insulate a flat roof with a concrete deck we recommend a warm deck construction method where the vapour control layer is sandwiched between the concrete deck and a layer of rigid pir insulation boards. Types of flat roof construction warm and cold flat roofs.