Construction Warm Flat Roof Fascia Detail

Having a manual for warm flat roof construction with details and a summary of rules to follow helps.

Construction warm flat roof fascia detail.

A waterproof exterior layer is essential and there are a number of options including bitumen based felt or asphalt epdm rubber and pvc based systems as well as cold applied liquid systems bitumen coverings. If the specification of the insulation is not correct you could have problems. Other flat roof construction details often refer to the types of flat roof coverings. Flat roofs aren t architecturally logical as rain and snow will shed much more quickly off a sloped 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. Whatever new flat roof covering you choose epdm rubber kemper liquid rubber triflex mariseal etc. Underneath the basics flat roofs are usually constructed with a ceiling nailed to joists which support a deck usually wood in residential construction a vapor barrier insulation and a roof board. Inverted warm deck roof the insulation boards in an inverted warm deck are laid over the structural deck and the waterproof covering.

The sandwich warm deck roof is the most common type of flat roof. For additional stability you can also use steel joists that are built into one or both of the walls. So what is warm flat roof construction. A warm flat roof is formed by placing a layer of insulation over the top of the roof structure.

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. In this video our principal surveyor steven dickinson explains problems with insulating a roof using the warm and cold roof construction methods. From there the flat roof system you choose will determine the materials you apply. Steve from london flat roofing explains how warm flat roof construction works in this excellent short video.

The insulation is placed below the waterproof covering and is either mechanically fixed or bitumen bonded on to the top of the deck. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. Of course you don t need to live in a modern house to deal with a flat roof. Front fascia flat roof detail.

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.