Nylon screw fixing polycarbonate washer WHITE

• Prevents uplift by wind
• Simple fixing for Polycarbonate to roof framework
• Allows natural expansion and contraction
• Increases support to polycarbonate sheet
• Sleeve prevents excessive tightening and local squashing around the screw
• Plastic cap to cover the screw head for a smooth finish and prevent screw rust.
• Protects against water ingress at fixing
• Complete collar with screw, screw cap cover and gasket
• White

The following general pointers are offered to help you best fit the Polycarbonate Sheet Washers / Buttons:

• Use a sharp steel drill bit instead of a wood one
• Drill at least 40mm away from the edge
• Drill between the ribs
• Do not over-tighten the screw fixing and squash the sheets - as a guide the button should not touch the sheet
• If using a large sheet the use of a perlin can be used.
• Use to fix into perlins, noggins or rafters.