Architectural · A-CWJMS

Penthouse Curb and Roof Transition Detail

Materials

Concrete Steel Timber / Wood Metal (misc.)Gypsum / Drywall

Elements

Roofs Floors / Slabs Waterproofing / Flashing Insulation Site / Paving Roof / Floor Openings

About this detail

A roof transition detail features a concrete curb sitting on a steel deck supported by structural framing at the roof level 185'-0", rising to the penthouse level 186'-11". The assembly includes three inches of minimum insulation with an R-15 rating, five inches of minimum rigid roof insulation, a roofing membrane, and a vapor retarder over galvanized decking and three-inch roof decking. The exterior wall framing consists of six-inch steel studs with cavity batt insulation providing R-19 minimum thermal performance, five-eighths-inch glass mat exterior sheathing, an air barrier, and five-eighths-inch painted gypsum board on the interior side. An eight-inch concrete curb is positioned at the base of the penthouse wall, with locations sized per the roof slab plan.

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