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Roof Stains: Meaning Behind Colors & Prevention
A stained roof can harm the curb appeal of your property. Roof discolorations may also indicate severe damage.
Learn what causes roof stains and how to prevent them from Shelter Construction, your trusted custom metal roofing contractor.
Green or Black Algae Stains
Gloeocapsa magma is a species of algae that commonly grows on roofing shingles. It can look from blue-green to dark black streaks or slime patches. Usually, it doesn’t cause harm to the roof, at least not the way mold can.
These stains can be removed with oxygen bleach or a solution of trisodium phosphate applied by a low-pressure wash. Leave the job to roof contractors for your safety and to prevent accidental roof damage.
Red & Brown Stains
Stains from rust around the chimney are quite common. It can be cleaned, treated and prevented with oxalic acid.
White Stains
Salt stains or efflorescence are caused by rainwater. It’s commonly found on slate roofs and at times on asphalt shingles.
Stain Patches
Dried leaves, seeds, fruits and other debris from nearby trees can land on your roof. Most usually grows in the shade of trees.
Water Stains
Check your attic and the ceiling below it for discoloration that appears damp. It can be a sign that your roof is leaking.
Light Spots on Shingles
Dark-colored asphalt shingles may look lighter and patchy as they get older. Inspect the gutters for granule buildup. Excessive granules in the gutters may be a sign you need to replace your old roof.
Turn to Shelter Construction Services for your residential roofing needs. Our team of professional roofers specializes in hail damage roof repair, replacement, leak detection and more. Call us at (434) 724-8160 for Virginia, or (336) 578-6731 for North Carolina. You may also complete our online form to get a free estimate.