Flat Roof Parapet Coping Details

Like any roof with batt insulation the venting is an important part of the system.

Flat roof parapet coping details.

This cover in turn laps over base flashing which is cleated to the roof deck or a nailing strip. The detail shows the method of flashing the head of a standing seam shed roof. The standing seams are laid flat 8 from the vertical wall folded 3 4 and secured with copper cleats spaced 12 o c. The top of the wall is covered by a copper coping cover similar to detail 9 3a.

The assembly is straight forward but what complicates matters is that the roof needs to be vented. Brick parapets were required. Autocad 2000 dwg format our cad drawings are purged to keep the files clean of any unwanted layers. Download this free cad block of a parapet wall detail in section view.

High parapet copper roof. A number of manufacturers produce suitable systems including preformed metal and g r p. Copper locking strips of the same weight as the flashing are soldered to the pans between seams at least 6 from the wall and engage the base. Use frost resistant copings to bs 4729 or other copings to bs 5642.

In all instances copings must include an adequate overhang and include a drip. Cappings and copings should be capable of being mechanically fixed to the parapet wall. The parapet itself is standard wood framing with an applied siding in this case t g 1 4 cedar. Normally you would find the venting at the soffit the underside.

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. Expansion allowances gutter specific expansion tables based on girth profile metal predicted annual δt expansion of building materials table with various expansion coefficients must be used for fascia and copings with consideration of both metal and substrate flat seam roof expansion guidance over 30 feet use batten seam design to allow for expansion. A combination of elements are used in this detail. Parapet wall design brief history biblical times deuteronomy 22 8 when thou buildest a new house then thou shalt make a battlement for thy roof that thou bring not blood upon thine house if any man fall from thence.

London building act of 1707 banned projected eaves.