3/8″ Self-Drill Screws to secure lower 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. Sufficient self drill screws provided, never pre-drill.
At lower edge of slope (eave) set screws every 8″ on-center. When using these screws at other locations set them 12″ on-center. Next See & Print Install Details