How old is your roof?
up to 5 years old
around 7 to 10 years
Algae is present from the moment the roof is put on the house. With the humidity, the wind and the birds, the spores are carried and deposited on your roof. At around 5 years of age, the dark streaks are becoming noticeable.
around 7 to 10 years
around 7 to 10 years
At around 10 years, the roof is clearly taken by the algae. The color is noticeably changing, and the actual color of the roof is starting to disappear.
After a rain or when the roof is humid in the morning, the dark streaks are very noticeable
15 + years
15 + years
At around 15 years the roof is barely visible anymore. Many people think the roof is black and the streaks is under the vents and chimney, where is it the other way around. That is the original color of the roof, and the dark color around it is the algae