Architectural · A-GB47K

Curtain Wall Sill at Concrete Foundation Wall

Materials

Concrete Reinforced Concrete Timber / Wood Masonry / CMU Metal (misc.)

Elements

Walls Windows Curtain Walls Facades / Cladding Foundations / Footings Waterproofing / Flashing Insulation Anchors / Embeds Reinforcing

About this detail

The assembly features a curtain wall system mounted above a notched concrete foundation wall and a fully grouted, reinforced concrete masonry unit wall with honed blocks matching the veneer. A twenty-two gauge pre-finished metal flashing and drip edge is set on treated two-by canted blocking with three-eighths-inch wedge anchors spaced at thirty-two inches on center typical. A one-inch aluminum back dam is sealed at the jambs with color-matching finish, backed by continuous backer rod and sealant beneath the sill. Dampproofing is applied to the exterior of the concrete foundation wall and covered with two inches of adhered expanded polystyrene rigid insulation, requiring verification of dampproofing compatibility. Final grade slopes away at a minimum ratio of one to twelve, transitioning to honed concrete masonry units extending a minimum of one course below the final grade level.

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