The reason you shouldn t use bleach to remove moss from your roof has to do with the composition of your shingles.
Remove moss on roof with bleach.
The bleach will kill the algae or moss but rinsing won t necessarily leave the roof sparkling clean.
Using bleach is recommended by most shingle roof manufactures and the arma asphalt roofing manufactures association.
Wind sunlight water etc.
1 to 3 cups chlorine bleach 2 gallons of water.
Remove moss in just 3 steps and keep it off for good.
Moss may look quaint atop your house but it can greatly shorten a roof s lifespan.
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.
Use the watering can to drench the moss with the bleach water solution.
It is this very oil tar and asphalt which protect your shingles from the elements.
Start at the top and work your way down.
You will notice the moss turning a yellow color.
Your shingles are made of a fiberglass mat that is covered with protective oils tar and asphalt.
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.