The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.
Warm flat roof parapet detail.
Warm roof adhered upstand to parapet wall with peel stop perimeter fixing and metal capping.
Parapet detail masonry cavity wall flat roof with parapet insulation above.
That will help you remember certain factors and details to build the best possible flat roof.
The sandwich warm deck roof is the most common type of flat roof.
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.
Having a manual for warm flat roof construction with details and a summary of rules to follow helps.
The insulation is immediately below the waterproofing layer.
Constructing a warm roof on a new extension with parapet walls i will have surplus amounts of insulation left over and am considering adding this insulation to the underside between the joists to double up the insulation would this install have any negatives.
To discuss your project in more detail please contact your local area manager.
Flat roof details and information relating to insulating a flat roof.
Details both in 2d and 3d to give a clear understanding.
Historically so many problems have occurred with parapets that we have a name for it.
To an untrained eye one flat roof looks very much like another especially from the ground level but in fact there are several different flat roof systems to choose from.
Warm roof adhered upstand to parapet wall with peel stop.
A warm flat roof is formed by placing a layer of insulation over the top of the roof structure.
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.
With the warm roof deck there is less likelihood of condensation forming in the warm roof space so ventilation is not required.
Inverted warm deck roof the insulation boards in an inverted warm deck are laid over the structural deck and the waterproof covering.
Learn more about warm roof cold roof construction.
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Warm flat roofs inverted flat roofs green flat roofs.
The vapour control layer is above the decking but below the insulation.
1 their major function today aside from confusing architects is to protect the edge of roof assemblies from wind uplift forces.
At the most basic level a flat roof consists of three basic components.
Steve from london flat roofingexplains how warm flat roof construction works in this excellent short video.