How soon after a roof cleaning do the algae streaks return?
Whole roof cleanings come with a two-year guarantee that your shingles will remain algae-free, but you can generally expect it to stay clean and beautiful for at least three years before the algae becomes noticeable again. Every situation is a little bit different, and it’s not unusual for a roof to stay clean for four years or more after a professional cleaning. This guarantee is transferable in the event that you sell your home. Partial roof cleanings are not recommended and DO NOT come with a guarantee. It’s important to understand that roof algae is not visible to the naked eye in its early stages, so while you may not see it in some areas, it’s most likely already there and beginning to develop. The growth of algae is slowed in areas that receive maximum sunlight, but eventually it will become visible! That’s why it’s so important to treat the entire roof surface.
Whole roof cleanings come with a two-year guarantee that your shingles will remain algae-free, but you can generally expect it to stay clean and beautiful for at least four years before the algae becomes noticeable again. Every situation is a little bit different, and it’s not unusual for a roof to stay clean for five years or more after a professional non-pressure cleaning. This guarantee is transferable in the event that you sell your home. Partial roof cleanings are not recommended and DO NOT come with a guarantee. It’s important to understand that roof algae is not visible to the naked eye in its early stages, so while you may not see it in some areas, it’s most likely already there and beginning to develop. The growth of algae is slowed in areas that receive maximum sunlight, but eventually it will become visible! That’s why it’s so important to treat the entire roof surface.
