Moss and algae growth on roofs are an unwelcome sight. While algae can be harmless, moss growth can potentially bring moderate damage to your roof. With this in mind, it’s always best to make sure that your roof is free of any algae or moss.
Aside from completely replacing your roof shingles, there are some DIY solutions that homeowners can do to clear their roofs of moss or algae.
How They Grow
Moss thrives in cold, damp conditions, which is why it’s usually found on the north side of roofs, or in areas that are shaded by trees. These areas receive the least amount of sunlight. Especially during winter, moss can spread on roofs that are not periodically cleaned.
Far from harmless, moss growth can ruin the structural integrity of a roof over time. Moss retains moisture on your roof shingles, and when the water freezes and thaws, the shingles crack and are pulled apart. This allows moisture to seep into the roof structure itself, leading to rot.
Moss grows on the edge and in between shingles. When the moss expands, it can loosen up the shingles, which can be hazardous when they unexpectedly fall off your roof.
Algae, on the other hand, is not as destructive but is still very much unsightly. Commonly mistaken for mold, the blue-green algae that grows on roofs is a strain called Gloeocapsa Magma. This type of algae thrives in warm and humid conditions. Blue-green algae is more detectable on light-colored shingles.
Combined, moss and algae growth can drive down the value of a home by compromising structural integrity, and by making it unappealing to the eye.
How to Get Rid of Moss and Algae
Although there are expensive chemical cleaners available in the market, sometimes the best solution is the application of some good old-fashioned elbow grease.
Using a long brush, moss can be brushed off shingles and roofs with a bit of effort. Pressure washers are also effective in getting rid of moss, although it can also potentially damage your shingles, which defeats the purpose. A flexible rake would also be helpful in clearing out moss.
Chemical cleaners are also effective in cleaning out moss and algae, but they can be toxic to everything else, including you. Spraying your roof with a combination of bleach and water is a safer alternative that is just as effective as chemical variants.
Just make sure that the plants underneath your roof are protected from the run-off, as the diluted bleach might kill them too. Spray the foundation plants with water, as this works surprisingly well as a shield against your homemade cleaning solution.
Leave It to the Professionals
If the moss and algae growth has gotten out of hand, however, the best solution is to completely replace your roof shingles. In that case, it’s best to hire a professional contractor. Scope Roofing Company specializes in roofing concerns and has provided residential and commercial owners in the Dallas-Fort Worth area professional and quality service for over 25 years. Contact us today to get a free quality professional inspection of your roof.