This assembly consists of structural I sheathing supporting a mechanically fastened fiberglass base sheet, two plies of fiberglass ply sheets, and a mineral-surfaced fiberglass cap sheet with an optional cool roof cap. The staple and tape attachment system utilizes staples spaced nine inches on center, configured in four rows in the field, seven to eight rows at the perimeter, and crosshatch rows at the corners. Continuous asphalt moppings are integrated between the waterproof membrane plies.
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