If you re trying to sell your home you may run into issues if you have roof algae.
Roof damage from algae.
Algae and lichen.
Moss can damage shingles especially asphalt and wood shake shingles.
However if the algae have penetrated deep into the roof affecting most of the roofing tiles or if your roof is old and in need of a repair generally then a roof replacement is probably more suitable.
They re likely to damage the shingles just be sure to wet your foundation plantings first and rinse everything in clean water when you re done.
Roof algae are signs.
One of the first problems homeowners experience with roof algae has to do with appearance.
See lichens on roofs for an example.
The less expensive solution is to spray wash the roof with a 50 percent mix of water and bleach to get rid of the algae.
8 ways roof algae can affect your roof appearance.
If your home has a highly reflective roofing system algae growth can affect the roof s ability to reflect sunlight.
No pressure washers please.
If the algae have only damaged a couple of shingles then repairs can fix the problem.