Cleaning Mold Off Asphalt Shingles

You could replace all the roofing with new shingles dark enough to disguise the staining or with shingles laced with copper granules which are lethal to algae.

Cleaning mold off asphalt shingles.

Here s how to clean the. If you have a consistent problem with mold growth on your roof consult a roofing professional. Never use a pressure washer to wash or rinse shingles. Let the mixture sit on the roof for 20 minutes before you rinse it off.

These stains will discolor your roof and damage the shingles over a period of time if left alone. 1 4 cup tsp trisodium phosphate or other heavy duty cleaner don t use a cleaner that contains ammonia or is not recommended for mixing with bleach as it can result in poisonous chlorine gas pour the ingredients into a pump type garden sprayer mix well and spray. Don t use a pressure washer to apply the cleaning agent. Make your shingles last longer.

In severe cases it may take more than one bleach treatment to kill all of the moss. But that would only make sense if the shingles were worn out. Instead gently pray the roof down with a mix of half bleach and half water. Doing so can damage your asphalt shingles.

Black streaks on the north and west facing and shaded. 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. A pressure washer can eradicate the moss from the deep crevices and prevent it from returning next season. Mold stains can form on roof shingles that are in permanent shade.

For large expanses of an asphalt shingled roof use a long handled scrub brush made for cleaning gutters and roofs. Power washing your roof will reduce its lifespan. The mild chemical reaction caused by rainwater coming in contact with the zinc inhibits the growth of mold and mildew. Moss will loosen over time and may be removed with a leaf blower.

Installing zinc strips under a row of shingles near the ridge of the roof will prevent mildew from forming. Not to worry though because you can clean the mold off with basic household bleach and save your roof long before you need an expensive replacement. Never use a pressure washer to clean an asphalt shingle roof as this w ill cause granule loss and very likely premature failure of the roof system. Generally you ll need to unscrew the tops of the spraying device and the cleaning agent fill the spraying device then.

Do shingles on your north west or other shaded roofs have streaky moldy stains. Step 3 applying asphalt roofing shingles containing a copper additive in their surface granules is an option. Extensive mold growth can also expose the interior of your attic or crawlspace to mold spores carrying the problem over to the inside.