Sign up for our monthly newsletter to receive homeowner tips, monthly specials, & construction info.




What is the discoloration on my roof?


Many homeowners ask about the discoloration on their roof. What you see is the result of algae. Algae growth can occur due to airborne spores, especially in areas of the roof that remain in the shade for extended periods of time. Nearby trees can lead to greater occurrences.


One method to fight against alage is to install zinc strips along both sides of ridges. The zinc has an adverse chemical reaction on the algae, and kills it overtime. Zinc granulars are placed on shingles that hold the “AR” distinction for being algae resistant. These shingles typically remain algae resistant for 5 years.

Powered by NC Web Pros