U-Profile & Screw Instructions: 3/8" Self-Drill Screws to secure lower roof U-Profile supplied free with order of U-Profile. Poly has thickness tolerance of plus or minus 5%. Sometimes the"U" fits snug, sometimes a little loose. On walls pressure of sheet against frame will hold "U" on the sheet, while allowing for movement of polycarbonate. Sufficient self drill screws provided should customer choose to use in all locations. Screws are color matched. At lower edge of slope (eave) set screws every 8" on-center. When using these screws at other locations set them 12" on-center.
 

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