How To Clean Algea Off Of A Flat Roof

First knock away any large lumps of moss with a brush or broom.

How to clean algea off of a flat roof. 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. There are several products on the market specifically designed to remove algae stains from roofs such as wet forget outdoor. A mixture of trisodium phosphate tsp bleach and water will also remove stains. The day you perform deep cleaning on the shingles should be cool and overcast.

Different types of roofs require different types of care. 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. That places the three water jets at the correct angle to blast off the dead algae colonies. Put water over the roof and moss and then put bleach onto the moss this will turn the moss brown in minutes.

Copper and zinc inhibit the growth of algae. Before you begin it s important to repair loose shingles and flashings to minimize roof damage. For example to prevent future moss growth we use a zinc based treatment for composition and tile roofs and a copper based treatment for cedar shakes. Invest in a roof cleaner to remove stains and growth from your flat roof.

Drag the rinsing tool in a forward and back motion as if you re vacuuming. 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 1 choose a cool and overcast day. After a few minutes hose the area down with water and check.

The more the roof is exposed to sunlight the less chance algae have to spread. Sunlight and warm weather will ensure the cleaning solution dries too fast to be of any use. Mix the product with water for a 1 7 dilution ratio a gallon covers about 700 to 900 sq. Use a sprayer attached to garden hose that s filled with equal parts chlorine bleach and water.

Step 2 use chlorine bleach to spot clean especially troubled areas. This is the best way to clean a roof if you have asphalt shingles. For a more enduring solution a strip of copper or zinc sheet metal can be installed on the side of the roof. Repeat until all the moss is gone.

Since algae prefer to grow in moist shaded areas keep trees around the house trimmed back.