How To Clean Mold Off Your Roof

Never use a pressure washer to wash or rinse shingles.

How to clean mold off your roof.

Step 1 choose a cool and overcast day. The concentrated jet will scrape off the small pebbles on top of the shingles and reduce their water repellency which will only make your mold situation worse. Wait about 20 minutes then rinse. Step 3 let the solution sit for 15 minutes then rinse it off with a hose.

That ll prevent the cleaner from drying out too quickly. Then use a long handled soft bristle scrub brush to remove the moss from the roof scrubbing from the top down to avoid lifting. In addition choose a day with little wind so that when you spray the solution it stays on your roof 1 x research sourcestep 2 perform maintenance on your roof. If the surface is too porous to remove mold completely such as in ceiling tiles you may have to replace it.

Before applying the cleaner spray the roof with water to cool it down. For more porous surfaces like drywall just use a rag so you don t damage the surface with more abrasive cleaners. Then use a long handled brush to scour the surface of the shingles and loosen stuck on mold while it s dry and brittle. Adding some tri sodium phosphate tsp will help clean the roof at the same time.

Splash the plants and parts of your lawn that are close to the sides of your house with water to protect them from the bleach solution. Hose off the area with plain water spraying at a downward angle. Scrub mold off hard surfaces such as window sills and tile with detergent and water and dry completely with a rag. The day you perform deep cleaning on the shingles should be cool and overcast.

Before you begin it s important to repair loose shingles and flashings to minimize roof damage. If you have a consistent problem with mold growth on your roof consult a roofing professional. Mix 1 part bleach to 3 parts water and apply to the mildew covered area with a hand pump sprayer. 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.

Sunlight and warm weather will ensure the cleaning solution dries too fast to be of any use. Step 1 protect your plants and lawn.