Timber Flat Roof Fascia Detail

The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.

Timber flat roof fascia detail.

Whatever new flat roof covering you choose epdm rubber kemper. Flat roof joists spanning the shorter length of the roof form the load bearing members of the structure. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading. For additional stability you can also use steel joists that are built into one or both of the walls.

A timber decking is then constructed and its weight supported by the joists. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. The joists are attached to load bearing walls by two common methods. Gravel stops and fascias are used where flat roofs end to provide a weathertight transition between roof and wall.

I explain problems with insulating a roof using the warm and cold roof construction methods. The construction of the flat roof is similar to that of the timber upper floor. The details shown concentrate on combined gravel stops and fascias. 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.