Flat Roof Parapet Capping Details

Timber frame flat roof detail.

Flat roof parapet capping details.

Flat roof detail masonry cavity wall flat roof insulation above and between joists. Do not lap tpo over top of parapet unless required by. If cavity is. Parapet detail masonry cavity wall flat roof with parapet insulation above joists.

When wind blows against a building it produces vortices at the roof edges that create huge pressure differences at roof perimeters that can suck roofs off buildings. Since the rainscreen system uses a waterproof membrane behind the siding the cap flashing at the parapet wall doesn t need to cover the rainscreen panels at the face. This style offers the designer the greatest number of dimensional options and the greatest number of corner units both internal and external. Parapet wall caps are custom fabricated to any measurements and it usually measure 10 in length but can also be bent in 12 lengths.

Parapets dramatically reduce these pressure differences at roof edges figure 3. Venting in wood framed parapets. Height of roofing at wall. Minimum of 12 to top of parapet.

A parapet is a part of a roof that eliminates the danger of a flat roof while opening up a wealth of opportunities to use roof space safely and effectively. Parapets where roofs meet walls can create problems and solutions in building technology learn from lstiburek how to properly approach them when building. We also manufacture radius parapet wall caps and can match any profile. This cover in turn laps over base flashing which is cleated to the roof deck or a nailing strip.

Timber frame flat roof detail. This is a nice detail because it keeps a crisp clean edge profile at the top of the parapet wall. The lower edge of the parapet cover is joined to the upper edge of the copper roof with a transverse seam. Top of parapet below cap to be sealed with fluid applied flashing.

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. Provide venting to each wall cavity. On the roof side the cover is locked into a standing seam parapet cover. Applications include parapet walls where water needs to be directed towards a balcony or flat roof for drainage purposes.