Architectural · A-WT57M

Roof Hatch Curb Flashing and Termination Detail

Materials

Metal (misc.)

Elements

Roofs Waterproofing / Flashing Site / Paving

Connections

Welded Connection

About this detail

An insulated roof hatch is mounted to an insulated metal curb extending upward from the roof assembly. The roof membrane extends up the curb face and is secured at the top by a continuous termination bar with fasteners spaced at six inches on center, supplemented by high-domed, capped, gasketed fasteners as required. A twenty-four gauge prefinished sheet metal counterflashing laps over the top termination, fastened at six inches on center. Below this, a twenty-four gauge galvanized sheet metal counterflashing with a three-inch minimum face is fastened approximately eight inches on center maximum. The roof membrane continues across the roof deck over the specified roofing assembly, incorporating hot-air welds and a heavy-duty walkway membrane where specified.

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