Mechanical · M-D538B

Duct Connection to Louver

Materials

Elements

Walls Doors Waterproofing / Flashing Drainage Connections / Plates

About this detail

Mechanical duct connection to an exterior louver assembly at a building wall penetration. The duct connects to the louver frame using attachment angles at the top and sides, sealed continuously with air and water-tight sealant along both angle edges. Stainless steel self-tapping screws are spaced twelve inches maximum on center, with the first and last screws positioned three inches from the end. The bottom of the duct overlaps a two-inch turn-up on the sill flashing, secured with pre-drilled fasteners to ensure a tight connection. A sill flashing with end dams, drip, and non-continuous one-quarter-inch thick plastic shims or spacers is installed below the louver to allow moisture weeping.

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