Expert Tips for Combating Black Streaks on Your Roof

Expert Tips for Combating Black Streaks on Your Roof

Mold usually gets the blame for cringe-worthy black streaks on roofs, but the real culprit is actually blue-green algae. The colonies of these bacteria appear that way because of their dark covering against harmful ultraviolet radiation.


Expert Tips for Combating Black Streaks on Your Roof

The general consensus is that algae growth isn’t a structural threat, but observers condemn it for being an eyesore. To rid your roofing system of algae and keep it from coming back, Gut-R-Dun Exteriors recommends these expert tips:

Eliminate Shade

Blue-green algae thrives in moist environments and stays nourished with airborne dust. It proliferates in areas that remain damp for extended periods by not getting a lot of sun regularly. The logical solution to this is to trim the overhanging branches that cover constantly shaded roof sections. In addition to algae-growth prevention, cutting overly long limbs helps reduce the chances of debris accumulation, wildlife invasion and abrasion.

Be Smart With Flashings

Experienced roofing and siding experts, including Gut-R-Dun Exteriors, agree that some metals are naturally toxic to algae. Flashings made from copper, zinc and galvanized steel (which is zinc-coated) inhibits any dark discoloration in the asphalt shingles around and beneath them. The rain washes traces of these metals across the roof, killing algae in the process.

Get Better Shingles

When buying a new asphalt-shingle roof, invest in a product with enhanced resistance to black stains. For instance, Owens Corning® integrates copper-lined granules into its shingles. Its StreakGuard™ Algae Protection offers a 10-year limited warranty.

Upgrade to Metal

Before you consider seeking asphalt-shingle roofing services, think about switching to metal instead. As said, certain metals inherently combat algae. In addition to this, metal roofs (especially smooth-surface ones) shed water and debris more easily to prevent moisture accumulation effectively. Also, they make cleaning a breeze to remove dead foliage without risking severe damage.

Win the battle against blue-green algae with Gut-R-Dun Exteriors. Call us at (937) 422-7709 now to schedule your free consultation to discuss your roofing needs in Kettering, Huber Heights or Springboro, OH.

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