Use closures under ridge flashing ( see below ). At lower edge of roof sheets and at top & bottom of wall sheets. closures are placed between poly & purlin or girt. Sundance Supply does not provide flashing.
At ridge closures are placed between ridge flashing and polycarbonate.
Sq. Ft. Price Page
Closures 3 ft. long. To determine needs take linear footage of top and bottom of sheets and divide by 3.