If you have algae that s leaving dark stains on your roof clean it easily with wet forget hose end.
How to clean algae from a roof.
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.
There are different ways to clean moss and algae off of a roof.
You can physically remove the invasive plants with a long handled scrub brush as long as you are careful with the shingles.
Never use a.
Apply with a sprayer and allow the solution to dwell on the roof surface for 15 to 20 minutes and then rinse thoroughly with low pressure water.
Roof cleaning with wet forget is easy as you can apply it with your feet firmly planted on the ground.
That way whenever it rains some of the metal molecules will wash down the roof and kill any algae trying to regain a foothold on your shingles.
Step 4 take precautions.
To keep the algae from coming back insert 6 inch wide strips of zinc or copper under the row of shingling closest to the roof peak leaving an inch or two of the lower edge exposed to the weather.
Step 3 check for cleanliness and rinse.
Put on rubber gloves and a breathing mask before proceeding you so you can.
Cleaning algae stains 4 gallons of water 1 gallon of bleach 1 cup of tsp tri sodium phosphate or a phosphate free substitution.
You can also use a pressure washer but that may break sensitive shingles.
Cleaning step 2 make and apply the bleach solution.
The jet tip nozzle will reach surfaces up to 30 so you don t need to use a ladder to get onto your roof.