Remove Moss On Roof With Bleach

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Remove moss on roof with bleach.

Moss may look quaint atop your house but it can greatly shorten a roof s lifespan. The most effective method of cleaning algae and moss from a roof is with a 50 50 mix of laundry strength liquid chlorine bleach and water. Chlorine bleach will kill roof moss but when you rinse if off the roof it may kill the plants growing alongside your house too. 1 to 3 cups chlorine bleach 2 gallons of water.

Start at the top and work your way down. Using bleach is recommended by most shingle roof manufactures and the arma asphalt roofing manufactures association. The bleach will kill the algae or moss but rinsing won t necessarily leave the roof sparkling clean. The reason you shouldn t use bleach to remove moss from your roof has to do with the composition of your shingles.

If your moss problem is extensive and you plan to use a large quantity of chlorine bleach bear in mind that it will accelerate the corrosion of your metal gutters and downspouts. Once the moss is soaked it should begin working in as little as four hours. Your shingles are made of a fiberglass mat that is covered with protective oils tar and asphalt. It is this very oil tar and asphalt which protect your shingles from the elements.

Algae will disappear and wash away with subsequent rains the association advises.