It is this very oil tar and asphalt which protect your shingles from the elements.
Remove moss on roof with bleach.
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.
You will notice the moss turning a yellow color.
The bleach will kill the algae or moss but rinsing won t necessarily leave the roof sparkling clean.
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.
Algae will disappear and wash away with subsequent rains the association advises.
Remove moss in just 3 steps and keep it off for good.
Use the watering can to drench the moss with the bleach water solution.
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.
Your shingles are made of a fiberglass mat that is covered with protective oils tar and asphalt.
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.
The reason you shouldn t use bleach to remove moss from your roof has to do with the composition of your shingles.