How To Remove Stains Off Roof

Algae can be killed and the stains removed using chemical cleaners though they usually return over time.

How to remove stains off roof.

Allow your roof ample time to dry off and then check on it. The second method is to spray on a coating of stain blocking solution defy stain blocker for roofs is one product but there are other brands as well a stain blocking product can buy you up to three years of protection from algae. Allow the mixture to sit on the shingles for 15 minutes then rinse the roof well with water from the garden hose. A mixture of trisodium phosphate tsp bleach and water will also remove stains.

If you decide to try it apply it shortly after you ve cleaned the roof. Unless you are on scaffolding or a walkway near the roof you should wash the solution off from the ground. Rinse from the top of the roof down to avoid re staining the shingles with the dirty water. Set the nozzle at the highest pressure setting and hold it 12 inches from the shingles.

Use a cleaner specially made for killing algae or by spraying a mixture of one part bleach to four parts water with tsp trisodium phosphate or other detergent added in a garden pump up sprayer. Step 7 let dry.