An aluminum storefront system bears directly on a concrete slab on grade with a one-quarter-inch shim providing leveling space underneath. Sealant with a backer rod is applied to both sides of the threshold joint for weather and air sealing.
ALUMINUM STOREFRONT SYSTEM 1/4" SHIM SEALANT & BACKER ROD. BOTH SIDES CONCRETE SLAB ON GRADE, SEE STRUCTURAL DRAWINGS FOR THICKNESS & REINFORCING
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