Keeping a roof clean during its service life takes patience, vigilance and some good old elbow grease. Knowing what makes roofs dirty can help, and perhaps even prevent surprise roof repairs. Read on as Cantrell Roofing, LLC takes a look at the common causes of dirty roofs.
Debris from Trees
Trees in the yard provide shade that helps reduce the heat absorbed through the roof, they protect your home from high winds, and their roots help prevent soil erosion. However, trees also shed leaves, twigs and needles, which can get onto the roof and into the gutters. Low-hanging branches can give small animals access to your roof, which may contribute droppings and more debris to the mix.
Fortunately, loose debris can be cleaned off using a leaf blower or a long-handled brush. If you elect to clean the roof yourself, avoid using a pressure washer, as it can damage the roofing surface. Professional cleaning services can make short work of debris on the roof and in the gutters. Also, hire a local arborist to trim tree branches without harming the trees themselves.
Blue-green algae causes black streaks on the roofing surface. While it doesn’t have affect roofing performance, the black streaks certainly look ugly. Blue-green algae has a dark outer “skin” (the same substance that causes the black streaks) that protect it from UV rays. It’s not a good idea to just leave them on the roof, hoping direct sunlight will kill them.
Fortunately, there are several ways to get rid of blue-green algae. You can wash the roof with a 1:1 bleach-and-water solution (you will have to protect the surrounding landscaping before you do). You can also have zinc strips installed along the roof ridges. Algae-fighting zinc particles will be spread on the roof as it rains. If your roof is up for replacement, consider algae-resistant shingles such as GAF StainGuard Plus™.
For some people, moss growing on the roof is an aesthetic improvement. But the truth is, it can cause serious damage to the roofing surface. Moss thrives in moist and shaded areas, so having surrounding trees trimmed can help reduce moss growth. If you have to clean the roof, do not use a pressure washer or a scrub brush. Instead, spray the roof with the previously-described bleach solution, or any off-the-shelf moss remover.
Cantrell Roofing, LLC is your leading provider of residential roofing, as well as torch down roofing and other commercial roofing systems. Give us a call at (903) 848-9494 or fill out our contact form to schedule an appointment.