How to install fibreglass roofing

Updated February 21, 2017

There is an alternative to traditional roofing materials. Fibreglass roofing panels (also referred to as corrugated fibreglass roofing) install on a framed roof in a similar fashion as metal roof sheets. This material, since it is light and durable, is ideal for outdoor patios, sheds and smaller structures. A little bit of patience and some carpentry skill will prove vital in this installation. As long as you have some background in maintenance, the project should be fairly straightforward.

Install rounded installation mouldings onto the roof, using galvanised screws and a drill. Mount the mouldings every 40 cm (16 inches) on the roof joists, or directly to the roofing boards spaced every 40 or 80 cm (16 or 32 inches) apart.

Lay the first corrugated panels onto the rooftop in the installation area. Place the panels flush to the edge of the roof and its intersection with walls (if any). Make sure the panel's curves rest flush over the mouldings.

Drill holes through the corrugated material, mouldings and into the roofing boards. Insert a galvanised screw into the hole and drill the screw into the roofing board to secure the panel. If installing directly onto a roof joist, pre-drill the holes by measuring every 40 cm (16 inches) along the panel and marking a chalk line to denote the location of the joists. Drill holes along the chalk line.

Place corrugated panels on the roof one next to the other. Overlap the panels lengthwise so one corrugation curve rests on top of the last curve on the preceding panel. Install rows with 15 cm (1/2 foot) of overlap along the width (short side) of the panels. Higher rows must be placed over the rows beneath them.

Things You'll Need

  • Moulding strips
  • Drill
  • 3 mm (1/8 inch) bit
  • Galvanised screws
  • Chalk
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About the Author

Steve Smith has published articles on a wide range of topics including cars, travel, lifestyle, business, golf, weddings and careers. His articles, features and news stories have appeared in newspapers, consumer magazines and on various websites. Smith holds a Bachelor of Arts in English and journalism from University of New Hampshire Durham.