How To Clean Algea Off Of A Flat Roof

A mixture of trisodium phosphate tsp bleach and water will also remove stains.

How to clean algea off of a flat roof.

That places the three water jets at the correct angle to blast off the dead algae colonies. Use a sprayer attached to garden hose that s filled with equal parts chlorine bleach and water. Drag the rinsing tool in a forward and back motion as if you re vacuuming. Invest in a roof cleaner to remove stains and growth from your flat roof.

Since algae prefer to grow in moist shaded areas keep trees around the house trimmed back. At northwest roof maintenance we clean most types of roofs including composition roofs tile roofs and cedar shake roofs. Of laundry strength liquid chlorine bleach and water. Before you begin it s important to repair loose shingles and flashings to minimize roof damage.

The more the roof is exposed to sunlight the less chance algae have to spread. Put water over the roof and moss and then put bleach onto the moss this will turn the moss brown in minutes. There are several products on the market specifically designed to remove algae stains from roofs such as wet forget outdoor. This is the best way to clean a roof if you have asphalt shingles.

After a few minutes hose the area down with water and check. Repeat until all the moss is gone. For a more enduring solution a strip of copper or zinc sheet metal can be installed on the side of the roof. Cleaners specifically designed for this purpose unlike chlorine based bleaches better penetrate the shingles to stunt growth without causing dangerous chemical runoff.

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. 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. Step 2 use chlorine bleach to spot clean especially troubled areas.

The day you perform deep cleaning on the shingles should be cool and overcast. Different types of roofs require different types of care. 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. Mix the product with water for a 1 7 dilution ratio a gallon covers about 700 to 900 sq.

Copper and zinc inhibit the growth of algae.