01 Nov How to Get Rid of Moss on Your Roof
Moss and algae thrive in damp and shady environments, making those shaded areas of your roof (which are often north) the perfect home for moss and algae growth. Moss is usually pretty easy to identify, but algae can be a little more tricky; you’ll want to look for black mold-like stains and streaks on your roof. Not only do moss and algae look unappealing on a roof, but they can also cause significant damage and degrading. Here is what you need to know about getting rid of moss and algae on your roof.
Use a long handled scrub brush for moss.
Your first weapon against moss growth on your roof is a long handled scrub brush for gentle cleaning. Pair it with a mixture of mild soap and water. Some roof cleaners will recommend using a solution of chlorine bleach and water, but bleach is highly toxic to any plants and vegetation surrounding your home. Be sure to work downward as you clean in order to prevent pulling up any shingles.
Use a specialized cleaner.
There are also specialized cleaners on the market available for ridding your roof of moss and algae. They are designed to alter the pH levels on your roof to a level at which moss and algae cannot thrive. Usually these cleaners are mixed with water and sprayed onto your roof. Many of them can be applied by homeowners, but if you are nervous about applying roof wash to your roof, then you’ll want to hire a professional to do it for you. It’s best to clean your roof on an overcast day, when the sun can’t cause the cleaner to evaporate before you are finished working with it.
Call a professional.
When in doubt, and if you have a particularly large amount of moss or algae accumulation, you’ll want to call a roofing care professional to clean your roof. While you might be tempted to use a pressure washer on your roof, doing so can damage your roof (not to mention void your warranty), causing shingles to loosen and potentially even causing leakage sites to crop up. A professional can clean moss and algae from your roof using a high-pressure washer without causing damage.
Replace shingles as needed.
If your shingles are worn or damaged already, then it might be worth your while to replace the shingles that have moss or algae on them. Shingles that are laced with copper granules are a particularly good idea because they discourage algae growth.