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July 29, 2011 by Roofer911 - 1 Comments
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How to clean moss off roof shingles, especially brittle cedar ones, is a consideration for all homeowners in neighborhoods with lots of shade trees and abundant rainfall and humidity. There are simple steps you can take yourself, or, because roofs are slippery and dangerous, you can call in an expert who has the equipment and experience to do the job thoroughly and safely.
For removing moss and lichens, careful power washing can be time, energy and cost effective, as well as friendly to the environment. Those are the pros. However, if you are not used to walking on a roof or to handling a power washer, this method could be detrimental to both your roof and your health. Power washing can strip away any unwanted substance, but may also take a strip off your roof shingle. Cedar can get really brittle and break under the pressure so it is important to get the correct setting on the washer that will remove the moss and leave the shingles intact.
Once your roof has dried, you can also use a mild bleach solution to make sure that all the plant life is dead and gone as well as to help prevent new growth. Brush it on with a broom and make sure that you grid the roof so that you are always stepping on the dry area. The wind carries seeds and the birds drop them so that a cedar shingle roof becomes a natural catch-all and planting ground. The bleach will help keep plant life from growing, but you will want to schedule an annual maintenance, important for how to clean moss off roof shingles.
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