Elastomeric roof coatings are applied thicker than paint. These elastomeric roof coatings are used for roof leaks repair. An elastomeric roof coating seal roof leaks, saves and extends the life of old roofs. Elastomeric roof coatings are an excellent choice for roof leaks repair.
How to Clean Algae and Moss from a Roof. Apply the bleach solution with a garden sprayer. Let it stand on the surface for about 20 minutes, then rinse it off with spray from a garden hose. Don't let the bleach solution stand on the roof for more than 30 minutes or so without rinsing.
1 Don't use a pressure washer to clean or rinse your roof. 2  It will remove surface granules from asphalt shingles, shortening their useful life (and may even void your shingle warranty). 3  Be careful. 4  Working on or near a roof is dangerous, particularity when it's wet and slippery.ix 1 part bleach to 3 parts water and apply to the mildew-covered area with a hand pump sprayer. Adding some tri-sodium phosphate (TSP) will help clean the roof at the same time. Let the solution sit for 15 minutes, then rinse it off with a hose. Check to see if any mildew remains on the roof.