How to Repair Damaged Fiberglass Roofing Panels

Fiberglass roofing panels are one of the most attractive and durable forms of roofing available. The roofing is made from high strength glass fibers, combined with resins. Fiberglass panels are thin and lightweight, which contributes to ease of installation. Although fiberglass is regarded as a durable roofing material, damage may still occur with time. This could be caused by flying debris, adverse weather conditions or normal wear and tear. If you know how to repair damaged roofing panels, it can help you extend the longevity of your fiberglass roof.

Materials Needed

  • Fiberglass repair kit
  • Sandpaper
  • Masking tape
  • Fiberglass cloth
  • Scissors
  • Plastic spreader
  • Paintbrush
  • Primer
  • Paint
  • Laminate roller
  • Ladder

Step 1 – Preparations

Select a day when no rains are expected. Check the local weather forecast to help you determine a good day. It is important that you undertake repairs during dry weather. This will allow the roof to dry well, which contributes to the success of your work. Obtain required materials from a hardware or home improvement store.

Step 2 – Sanding

Use a 200-grit sandpaper to sand around the damaged area. This helps to smooth the surface of the panel, and facilitates a good seal once repair material is attached. Be sure to sand 3 inches in all directions around the damaged area.

Step 3 – Tape the Area

Apply some masking tape over the damaged area on the outside of the roof. This will prevent the spread of resin to other areas on the panel, when you apply it from inside the roof. Climb down from the roof and proceed with repairs from the inside.

Step 4 – Cut Out Fiberglass Cloth

Use a pair of scissors to cut out a round patch of glass cloth. Cut the cloth so that it exceeds the damaged area by 3 inches all round. This will ensure that the damaged area is adequately covered.

Step 5 – Prepare Resin

You’ll find a resin and a catalyst inside your fiberglass repair kit. Mix the 2 materials according to the instructions contained in the kit.

Step 6 – Apply Glass Cloth

Use your paintbrush to apply a thin coat of resin onto the glass cloth. Spread it evenly over the entire surface, to facilitate a secure attachment. Apply the glass cloth onto the damaged area. Press it firmly onto the panel so that all areas of the cloth attach onto the panel. Use a laminate roller to get rid off bubbles underneath the glass cloth. Allow about 2 hours for the area to dry completely.

Step 7 – Apply Filler

Proceed to the outside and mount your roof again. Remove the masking tape from the panel. Your kit also contains epoxy filler. Use a plastic spreader to apply some filler on the outside surface of the damaged area. It is best to apply in thin layers, until the entire area is well covered. Spread the filler in one direction only, so that bubbles don’t develop once it dries.

Step 8 – Apply Resin

Use your paintbrush to apply some resin over the filler.

Step 9 – Paint

Apply a suitable primer and paint to the panel. This will help protect it and give the roof a uniform appearance.