Timber Flat Roof Fascia Detail

I explain problems with insulating a roof using the warm and cold roof construction methods.

Timber flat roof fascia detail.

Gravel stops and fascias are used where flat roofs end to provide a weathertight transition between roof and wall. The construction of the flat roof is similar to that of the timber upper floor. A timber decking is then constructed and its weight supported by the joists. Trada and approved document part a give guidance on sizes of joists for flat roofs relating to spans and loading.

Flat roof joists spanning the shorter length of the roof form the load bearing members of the structure. For additional stability you can also use steel joists that are built into one or both of the walls. Whatever new flat roof covering you choose epdm rubber kemper. Having a manual for warm flat roof construction with details and a summary of rules to follow helps.

The roofs have a timber frame as the supporting structure. Joists are placed on edge spaced at 400 600mm centres supported by external and internal load bearing walls. The details shown concentrate on combined gravel stops and fascias. The joists are attached to load bearing walls by two common methods.