Causes of Your Roof Shingle Discoloration

Shingle discoloration on a roof is usually caused by a few common factors:

Algae Growth: Algae, particularly Gloeocapsa magma, can grow on shingles, especially in humid or shaded areas. This growth often appears as dark streaks and is more common in warmer, humid climates.

Moss and Lichen: Moss and lichen can also take hold in damp areas. Moss can trap moisture against the shingles, which not only leads to discoloration but can also damage the shingles over time.

UV Rays: Prolonged exposure to the sun’s ultraviolet rays can cause shingles to fade, especially darker-colored ones. Over time, UV radiation degrades the outer layer of the shingles, leading to a lighter or more washed-out appearance.

Environmental Debris: Falling leaves, pollen, and dirt can collect on the roof, leading to discoloration. Debris may retain moisture, encouraging the growth of mold, mildew, or algae.

Rust or Metal Staining: If there are metal elements on the roof, like flashing, vents, or chimneys, rust can run onto the shingles when it rains. The metal’s oxidation and runoff can leave reddish or brown stains.

Quality of Shingles: Lower-quality shingles may be more susceptible to discoloration as they age, especially if they lack protective coatings designed to prevent algae or UV damage.

Water Damage and Leaks: Water damage from poor drainage or roof leaks can lead to staining or dark patches. Persistent moisture can weaken shingles and attract mildew.

To address shingle discoloration, regular roof maintenance, like cleaning debris, applying algaecide, or using zinc or copper strips to inhibit algae growth, can help.

Contact us today for a free roof inspection in Southeastern NC. We serve from Wilmington to Raleigh.

Choufani & Bailey Roofing & Restoration is your 5 star roofing company in Wilmington North Carolina. With locations in Garner and Wilmington we cover a wide area from Wilmington NC to Raleigh NC. We are a full service roofing company, and offer roof repairs, roof installations, and roof replacements. We specialize in Storm Damage Insurance Claim Roof Restoration and roof replacements. Have concerns about your roof after a recent storm? Need any roofing services? Give us a call at 910-828-2955 and schedule your roof inspection!