Architectural · A-A7HEA

Ob - Clerestory

Materials

Aluminum Cold-formed Steel Glass / Glazing Gypsum / Drywall Membrane / Roofing Metal (misc.)Steel Timber / Wood

Elements

Beams Ceilings Connections / Plates Curtain Walls Decks Insulation Roof / Floor Openings Roofs Site / Paving Walls Waterproofing / Flashing Windows

About this detail

The clerestory window sill meets the roof curb, integrating an aluminum curtain wall assembly with a cross-laminated timber roof deck and supporting steel beam. The assembly is framed with 92-millimeter steel studs and 16-millimeter glass-fiber faced exterior gypsum sheathing, with continuous sealant joints and backer rods at the exterior and interior interfaces. A prefinished metal sill flashing with a drip edge and a minimum two percent slope ties into the self-adhered air and moisture barrier, which laps over the roof underlayment. The roof vapor barrier membrane extends up and over the curb with a minimum 200-millimeter upstand, turning up to meet the curtain wall. A double layer of 16-millimeter pressure-treated plywood forms the window sill plate, stepped to allow for an anti-cavitation gap, while a 16-millimeter gypsum sill return with a 'J' trim finishes the interior against the curtain wall sill and steel beam.

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