How to install screws in corrugated roof panels

Written by kimberly johnson
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How to install screws in corrugated roof panels
Corrugated roofing has raised ridges. ( Images)

Corrugated roof panels consist of either metal or fibreglass and have raised ridges along the surface to let rainfall drain quickly off the roof. The corrugated roof panels come in large sheets. You must cut them to size and overlap them before securing them to the roof. Although you can use nails to attach both fibreglass and metal corrugated roof panels, screws provide a stronger and longer lasting bond with the underlying roof beams.

Skill level:

Things you need

  • Drill
  • Drill bit
  • Neoprene washer
  • #300 series stainless steel woodgrip screws
  • Electric screwdriver
  • Dust mask (optional)
  • Safety goggles (optional)

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  1. 1

    Place the first corrugated roof panel onto the roof letting it hang off the side and lower edges by at least 15 to 20 cm (6 to 8 inches).

  2. 2

    Locate the wooden roof beam under the roof panel near the edge of the house. Insert a drill bit into a drill that is 1.5 mm (1/16 inch) larger than the diameter of the screws you are using. Hold the drill against the roof panel approximately 6 inches from the top or bottom and create a 1.2 cm (1/2 inch) deep hole. Create additional holes at 15 to 20 cm (6 to 8 inch) intervals along the beam.

  3. 3

    Place a neoprene washer onto the end of a 1.2 cm (1/2 inch) long #300 series stainless steel woodgrip screw. Insert the tip of the screw into the first pre-drilled hole and secure it with an electric screwdriver. Tighten the screw only until you see the washer compress.

  4. 4

    Insert additional screws along the same roof beam in the location of each pre-drilled hole.

Tips and warnings

  • It is very important to use the neoprene washers when fastening the roof panels with screws, since they prevent water from leaking into the screw holes.
  • If the roof panels are fibreglass, wear safety goggles and a dust mask when drilling the holes.

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