Flat Timber Roof Detail

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Flat timber roof detail.

The construction of the flat roof is similar to that of the timber upper floor. A roof which is approximately flat is called as a flat roof. Normally a slope of inch per foot is used. Flat roofs aren t actually flat but must slope to drain water.

See more ideas about roof detail roof architecture details. Where a new flat roof abuts an existing external wall the joists can be hung on metal joist hangers which are fixed to a horizontal timber plate wall bolted to the wall. The insulation is below the deck but above the plasterboard. For additional stability you can also use steel joists that are built into one or both of the walls.

Flat roofs can be used to create box shapes cantilevered into daring overhangs or can be planted to create usable vegetated gardens. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. Usually a flat roof is built with a slight slope to provide some drainage.

Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. A cold flat roof is one where the insulation is between or between and below the roof joists. Refurbishing an existing timber joisted flat roof which has no insulation. Inner gutter warm roof.

Having a manual for warm flat roof construction with details and a summary of rules to follow helps. On a basic level flat roof construction comes in the form of roofing timbers or joists as they are more commonly known or steels that are laid across two uprights walls in most cases. Mounting parts snow guard. This is used for refurbishment e g.

Cold roof vent for ventilation of a roof spacing. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. Search flat roof details. A cavity closer should be provided to the top of the walls to prevent fire spread and to stop damp air entering the roof space.

Cold roof vent timber. Inner gutter in a warm roof.