Living in the Pacific Northwest, where damp conditions are common, moss, algae, and fungus can thrive on rooftops. While these growths may give your home a rustic look, they pose serious risks to the structural integrity of your roof. Here’s what to look for and why you should address it immediately.
What Do Moss, Algae, and Fungus Look Like on a Roof?
- Moss: Moss appears as clumps of soft, green growth that often spread in shady areas. You’ll see it creeping along the shingles, especially between them. As moss grows, it thickens, creating a dense mat that can cover large areas if left unchecked.
- Algae: Algae is typically seen as dark, streaky stains that run down your roof, especially in humid environments. The black or green discoloration doesn’t just make your roof look dirty, it’s a sign that the shingles are slowly being broken down.
- Fungus: Fungus may appear in combination with moss and algae or as white, grey, or brown patches. It grows in damp, shaded areas and can take on different forms, from slimy textures to powdery patches. The presence of fungus can also indicate underlying moisture issues.
Why Are Moss, Algae, and Fungus a Problem?
- Trapped Moisture: Moss, algae, and fungus all retain moisture, which prevents your roof from drying out properly. This constant dampness can seep under the shingles and into the roof deck, leading to water damage and rot.
- Shingle Deterioration: Algae and fungus can cause asphalt shingles to break down more quickly. Algae’s streaks are particularly corrosive, while moss can lift shingles, exposing them to the elements.
- Structural Damage: Over time, the weight and moisture from these growths can compromise the structure of your roof. Fungus, in particular, may spread to the wooden supports underneath, leading to rot and weakening the overall framework of your roof.
- Reduced Curb Appeal: Beyond structural concerns, moss, algae, and fungus make your home look neglected. Dark streaks and patches of moss create an unsightly appearance, which can affect your home’s value.
- Pest Attraction: A damp, moss-covered roof can attract pests like insects and small animals that can further damage your roof as they burrow into the shingles or roof deck.
How to Prevent and Remove Moss, Algae, and Fungus
It’s critical to remove moss, algae, and fungus before they cause serious damage to your roof. Here are a few steps you can take:
- Regular Roof Inspections: Have your roof inspected regularly, especially after the rainy season, to catch early signs of growth.
- Roof Cleaning: Professional moss and algae removal can restore your roof’s appearance and prevent further damage. Avoid using high-pressure washing, which can harm the shingles.
- Trim Trees: Keep trees and branches away from your roof to limit the shade and moisture that help moss and fungus grow.
At Hood Canal Roofing, we specialize in roof inspections and replacement. Don’t let these growths ruin your roof—contact us for a free estimate today!
Visit canalroofing.com for more information.