How to Recoat Fiberglass Roofing

Known for its flexibility and durability, fiberglass roofing is a synthetically manufactured roofing material resistant to mildew, corrosion, rot and extreme weather conditions. Fiberglass material is applied to many types of roofing, including recreational vehicle roofs. Homeowners may apply 100 percent acrylic roof coating to fiberglass roofing for sun reflectivity and weather resistance. Although acrylic roof coating is flexible, it eventually deteriorates, leaving fiberglass roofs exposed to ultraviolet sun rays and other damaging elements. Recoating fiberglass roofs every two to three years ensures consistent protection against weather conditions.

Putty knife
Push broom
Fiberglass cleaner
Pump sprayer
Stiff-bristle brush
Garden hose
Work gloves
Dust mask
Fine-grit sandpaper
Fiberglass RV roof coating
Stirring utensil
Paint tray
3/4-inch nap roller

Instructions

- 1
  Scrape any existing roof coating that is flaking or peeling off the fiberglass roof using a putty knife.
- 2
  Sweep loose debris off the fiberglass roof using a push broom. Remove all twigs, dirt, leaves and detached fragments of roof coating.
- 3
  Pour fiberglass cleaner into a pump sprayer. Spray the cleaner onto a 4-by-4-foot area of the fiberglass roof, then scrub the saturated area with a stiff-bristle brush to loosen stuck-on grime.
- 4
  Rinse the soapy section of fiberglass with a garden hose, then clean the remaining 4-by-4-foot sections of fiberglass roofing using the previous techniques. Let the entire roof air-dry overnight once it is completely clean.
- 5
  Put on work gloves and a dust mask. Rub fine-grit sandpaper over the entire fiberglass roof to abrade the surface, which allows the finish coating to bond better.
- 6
  Rewash the entire roof surface using the previous cleaning procedure. Let the roof air-dry overnight.
- 7
  Make sure the weather is warm and sunny with temperature levels above 50 degrees F. Thoroughly mix fiberglass RV roof coating with a stirring utensil before pouring the liquid into a paint tray.
- 8
  Apply a single pass of fiberglass coating along the edges of the fiberglass roof using a 3/4-inch nap roller.
- 9
  Coat the remaining expanse of fiberglass roofing using the nap roller. Apply each pass of fiberglass coating back and forth across the roof, using 1 gallon of coating for every 350 square feet of roof.
- 10
  Let the first application of fiberglass coating cure for at least four hours.
- 11
  Apply another coat of fiberglass roof coating to the entire fiberglass roof using the prior procedure except applying these passes perpendicular to the previous passes for even coverage.
- 12
  Let the second coating cure for 24 hours.

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