Timber Flat Roof Parapet Detail

The parapet roof by far the most common type of flat roof isn t actually flat at all.

Timber flat roof parapet detail.

There have been numerous cases of rotting timber in new zealand parapet walls. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls. 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. Parapet detail joists perpendicular 3 13.

Roofs tend to be either pitched or flat and typically in residential construction timber is the most common material used. A parapet roof is simply put when a building s outermost walls extend upwards past the roof around the edges most often by a few feet. Roof panels 3 8 1 roof panel connections 3 9. Having a manual for warm flat roof construction with details and a summary of rules to follow helps.

For additional stability you can also use steel joists that are built into one or both of the walls. Intermediate floor joist parallel 4 3. Dormer in section 3 11. Flat roof joist and decking 3 10.

Andrew t boyne architect. Ventilated batten void warm roof gable 3 06 timber frame timber flat roof 3 07 timber frame timber flat roof with parapet 3 08 timber frame lintel at window head 3 09 timber frame windows and doors jambs and cills specification within an example should 3 10 timber frame ground. Bitumen waterproofing 2 ply rigid plastic foam board vapour barrier separating membrane edge fixed timber roof element parapet capping sheet metal clip bitumen waterproofing 2 ply rigid plastic. The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure.

While a roof parapet wall may seem like a small detail in the grand scheme of the entire building design it can actually change the dynamic of an entire roof both in terms of cosmetic detailing and safety. A parapet roof involves a typical sloped roof that is concealed behind a parapet wall so that it gives the impression of being flat. 3 05 timber frame pitched roof. The roof is a key element of the building structure providing protection from the elements and has a vital role in reducing heat loss from the building.

Introduction to flat roof details. Historically so many problems have occurred with parapets that we have a name for it. 1 their major function today aside from confusing architects is to protect the edge of roof assemblies from wind uplift forces. Parapetitus they have a long history which of course is not always clear that allows me to embellish without threat of peer review reversal.