Flat Roof Parapet Capping Details

Parapet detail masonry cavity wall flat roof with parapet insulation above joists.

Flat roof parapet capping details.

Applications include parapet walls where water needs to be directed towards a balcony or flat roof for drainage purposes. We also manufacture radius parapet wall caps and can match any profile. 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. Parapets where roofs meet walls can create problems and solutions in building technology learn from lstiburek how to properly approach them when building.

Timber frame flat roof detail. 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. Flat roof detail masonry cavity wall flat roof insulation above and between joists. Timber frame flat roof detail.

This cover in turn laps over base flashing which is cleated to the roof deck or a nailing strip. 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. The lower edge of the parapet cover is joined to the upper edge of the copper roof with a transverse seam. Provide venting to each wall cavity.

Parapet wall caps are custom fabricated to any measurements and it usually measure 10 in length but can also be bent in 12 lengths. Parapet detail masonry cavity wall flat roof with parapet insulation above joists. On the roof side the cover is locked into a standing seam parapet cover. This style offers the designer the greatest number of dimensional options and the greatest number of corner units both internal and external.

Table of contents 1. If cavity is. Minimum of 12 to top of parapet. This is a nice detail because it keeps a crisp clean edge profile at the top of the parapet wall.

At the edge of these roofs parapet walls are commonly found and are vulnerable to leaks if not flashed correctly. Parapets dramatically reduce these pressure differences at roof edges figure 3. Top of parapet below cap to be sealed with fluid applied flashing. 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.