A storefront head mullion intersects a concrete slab on metal deck and exterior wall assembly. Waterproofing and air barrier continuity are maintained using a sheet silicone transition strip tied into liquid flashing over the slab edge and wall backing. A four-inch extruded aluminum trim assembly is attached to wall girts from the assembly above, coordinated with a vented casing bead and cement plaster finish. The storefront head is set with sealant over a backer rod and tied to a matching head flashing profile with low-profile fasteners.
ASSEMBLY 1 HEAD MULLION CEMENT PLASTER ASSEMBLY SEALANT O/ BACKER ROD FFSASM HEAD FLASHING PROFILE VENTED CASING BEAD 4" EXTR. ALU. TRIM ASSEMBLY, ATTACHED TO GIRTS FROM WALL ASSEMBLY ABOVE LIQUID FLASHING ALIGN, TYP. 1/4" FLASHING, PAINT TO MATCH EXTR. ALU. TRIM COLOR 3" LIQUID FLASHING 4" SHEET SILICONE TRANSITION STRIP LEVEL 6 67'-0" SHEET SILICONE TRANSITION STRIP CONCRETE SLAB ON METAL DECK, S.S.D. LIQUID MEMBRANE FFSASM HEAD FLASHING, PAINT TO MATCH METAL PANEL LOW PROFILE FASTENER 3" = 1'-0" 4/A4.03 11 STOREFRONT SILL - BRICK W/ EXTR. ALU. TRIM, TYP.
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