The dark streaks left behind by algae on your roof aren’t just a cosmetic problem. Left attended, algae can shorten your asphalt roof’s lifespan. That’s why we recommend GAF StainGuard Plus™ shingles to our clients.
What Makes Asphalt Shingles Vulnerable to Algae?
Blue-green algae love to feast on limestone, the same material that protects shingles from the elements and ultraviolet (UV) rays. Algae can weaken your roof in two ways: either they eat away the limestone on the shingles or absorb heat, which is then absorbed by asphalt shingles. Those dark streaks are made of a pigment that doubles as a sunscreen for plant cells. When exposed to the sun, these dark pigments absorb heat, which is then transferred to your roof by extension.
How to Get Rid of Algae
Of course, you can always wash off these black streaks. The only problem is you’ll need to scrub them off by hand – you can’t pressure washers because they can damage your roof. To save yourself time and effort, it’d be better to install algae-resistant shingles instead.
How Do Algae-Resistant Shingles Work?
Manufacturers take advantage of copper’s antibacterial bacteria to combat cyanobacteria or blue-green algae. They add layers of copper to their shingles to inhibit algal growth, but they quickly lose their effectiveness, leaving your roof vulnerable to algae damage.
That’s why we recommend GAF StainGuard Plus, which can last longer than a conventional algae-resistant shingle. Instead of layers of copper, copper-coated mineral granules are infused throughout the shingle’s surface. These granules slowly and continuously release just the right amount of copper to combat algae, giving your roof a wider period of protection. To make sure you get to enjoy all of the StainGuard Plus Shingles’ benefits, only hire qualified roofing contractors.
Looking for experienced contractors in your area?
Pritchett Bros is one of the most experienced family-owned contractors in the state, boasting over 50 years’ worth of experience. We offer professional roofing and remodeling services. To get a free roof inspection, call us at (812) 275-3185, or fill out our form here. We serve homeowners in Bloomington, IN, as well as other nearby areas.