Algae: A Common Culprit Behind Roof Stains

Algae growth, particularly on the northern slopes of roofs, is a prevalent cause of black streaks and discoloration. This issue often arises due to algae feeding on the limestone filler in asphalt shingles. While algae stains are not preventable, they can be effectively removed by a professional roofing company in Port St Lucie, employing low-pressure power washing with roof-safe detergents. If left untreated, algae can merge with fungus to form lichen, which is much harder to remove and can cause significant damage to the roof.

Rust: The Red and Brown Stains on Your Roof

Metal roofs or fixtures are prone to rust, leading to red or brown stains. Regular maintenance by a skilled roof repair contractor in Port St Lucie FL is crucial to prevent and address these issues. Identifying the source of rust, often a rusted roofing nail or compromised metal chimney, is essential. Treatment typically involves household remedies like vinegar or oxalic acid for deeper stains, but safety precautions are necessary during application and roof work.

Asphalt Bleed-through: A Sign of Aging Roofs

Asphalt bleed-through, characterized by black streaks on asphalt shingles, indicates the breakdown of roofing materials. This phenomenon occurs when the black pigment from the asphalt surfaces due to wear or inferior quality. Distinguishing asphalt bleed-through from algae stains is vital, as they appear similar but have different implications and treatment methods. Consulting with a reputable roofing contractor is recommended to assess the need for roof replacement or repair.

Proactive Measures and Expertise from FIXD Roofing LLC

To maintain the integrity and appearance of your roof, it’s essential to understand these common causes of discoloration and seek professional assistance. FIXD Roofing LLC, a leading roofing company in Port St Lucie, offers expert services to diagnose and address these issues effectively. Regular inspections and maintenance can prevent long-term damage and preserve your roof’s aesthetic appeal.


Roof discoloration can significantly impact your home’s curb appeal and structural integrity. Understanding the common causes—algae, rust, and asphalt bleed-through—is the first step in maintaining a healthy roof. For expert guidance and solutions, consider consulting with FIXD Roofing LLC, a trusted name in the roofing industry. Regular maintenance and timely interventions can ensure your roof remains in excellent condition for years to come.