Tile and Shingle Roofs should Never be pressure washed. Pressure washing damages your roof by blasting away the granules, and this crude and abusive method of cleaning doesn’t really get rid of all of the algae growths. Most roofs that have been pressure washed, will need to be cleaned again in as little as one year, depending on the amount of rainfall. Besides ruining your shingle roof, all pressure washing does is scatter the still living algae from your roof all over the place.
The Asphalt Roofing Manufacturers Association recommends a low-pressure washing method using certain cleaners to restore roof shingles suffering from roof algae, followed by a low-pressure rinse. Here at Pressure Pros, we use the cleaners and methods recommended by these companies. This is the best process for safe and damage-free roof washing. If your shingles are still in good condition, but have roof algae on them, having your roof cleaned will allow you to get the full life out of your shingles, saving you tons of money.
Call us at 210-913-9457 for non-pressure washing of Stone Coated Steel, Decra Tile Roofs, GranuTile, Gerard, and Non Pressure Chemical washing for Metro Roofing Products. We also clean GAF Shingle Roofing, TruSlate, PolyGlass, Monier Life Tile, US Tile, Boral, Metro Roof Products, as well as Gerard Roofing Stone Coated Steel.