How To Remove Green Mold From Roof Shingles

Then add one tablespoon of trisodium phosphate tsp and mix well.

How to remove green mold from roof shingles.

Fill a handheld pump sprayer with the solution and apply it to the moldy shingles only. This will prevent the solution from draining in your direction. The mild chemical reaction caused by rainwater coming in contact with the zinc inhibits the growth of mold and mildew. Step 3 applying asphalt roofing shingles containing a copper additive in their surface granules is an option.

Instead gently pray the roof down with a mix of half bleach and half water. Installing zinc strips under a row of shingles near the ridge of the roof will prevent mildew from forming. In a two gallon bucket create a cleanser composed of 1 4 chlorine bleach and 3 4 water. Power washing your roof will reduce its lifespan.

Spray the entire roof thoroughly. The less expensive solution is to spray wash the roof with a 50 percent mix of water and bleach to get rid of the algae. Start from the top shingle and rinse downward to prevent water seepage. Start on lowest row of shingles and work your way backwards to the upper part of the roof.

Continue spraying until you see runoff then let the chemicals sit for 15 20 minutes to soak in and begin attacking the mold. They re likely to damage the shingles just be sure to wet your foundation plantings first and rinse everything in clean water when you re done. Run your gloved hand over the shingles to check for any slimy mold remaining after you re finished rinsing. Let the mixture sit on the roof for 20 minutes before you rinse it off.