Timber Flat Roof Parapet Detail

A parapet roof involves a typical sloped roof that is concealed behind a parapet wall so that it gives the impression of being flat.

Timber flat roof parapet detail.

Introduction to flat roof details. Andrew t boyne architect. 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. Intermediate floor joist parallel 4 3.

For additional stability you can also use steel joists that are built into one or both of the walls. Roof panels 3 8 1 roof panel connections 3 9. 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. Flat roof joist and decking 3 10.

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. 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. 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.

Having a manual for warm flat roof construction with details and a summary of rules to follow helps. The steels or rsj s rolled steel joists are often built into one or both walls to give added stability to the roof structure. Dormer in perspective view 3 12. Roofs tend to be either pitched or flat and typically in residential construction timber is the most common material used.

Parapet detail joists parallel details in section 4. Parapet detail joists perpendicular 3 13. Dormer in section 3 11. 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.

There have been numerous cases of rotting timber in new zealand parapet walls. The parapet roof by far the most common type of flat roof isn t actually flat at all. 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. The basic construction of a flat roof starts with roofing timber that is laid across two upright items usually two walls.