Short version: Roof paint peels for five reasons: poor surface prep, no primer on porous tiles, UV breaking down an unstable film, trapped moisture, and using the wrong coating for the roof. Fix it by stripping loose paint, priming with Roof Tile Primer where needed, and recoating with a UV-stable, flexible product like Premium Roof & Wall or Fiber Coat.
The 5 reasons roof paint peels
Peeling is almost always an adhesion or breakdown failure, not a paint defect. In order of how often we see it: (1) painting over a dirty, chalky or algae-covered roof; (2) no primer on porous concrete tiles; (3) UV degrading a cheap or non-UV-stable film; (4) moisture pushing from underneath (leaks, ponding); (5) a coating too rigid for a roof that expands and contracts.
How to fix a peeling roof
Scrape and wire-brush all loose paint back to a sound edge, wash off dirt and algae, let the roof dry, prime porous or frail tiles with Roof Tile Primer, then apply two coats of a flexible, UV-stable roof coating.
How to stop it coming back
Use the right product for the roof, never skip the primer on tiles, apply two coats at the correct spread rate, and treat moss and lichen before they lift the film. On flat roofs that pond water, step up to Fiber Coat.
Where to buy
Shop roof coatings. Trade pricing: +27 84 985 6141.
