These stains will discolor your roof and damage the shingles over a period of time if left alone.
Mold on roof of house.
There are a number of commercial products available that will get rid of mold but if you don t mind working at heights getting mold off roof shingles is really something you can do yourself.
Extensive mold growth can also expose the interior of your attic or crawlspace to mold spores carrying the problem over to the inside.
Just because you can t see it however doesn t make it any less dangerous.
Moisture and water can get in to your home through the holes in your roof and down to the wood underneath.
Mold and mildew growth.
When it comes to the structural integrity of the roof on any given house roof algae and mold are two of the biggest enemies.
Mold growth on roofs is one of the most costly problems when homeowners fail to take action and simply allow the growth to continue.
Algae on the roof is not nearly as problematic as mold though.
Mold stains can form on roof shingles that are in permanent shade.
As you can see the alga gets on your roof easily enough the wind just has to blow in the right direction and there it is.
Just as easily mold and mildew follow.
Not only is it unattractive it can actually shorten the life of your shingles so you really should get rid of it.
The standing water and humidity the rapidly growing spores and wood rot these are quick and fertile breeding places for mold.
At worst they can pose serious health risks.
At best slimy black mold deposits are an eyesore.
While unsightly algae on rooftops does not present a health hazard and it is unlikely to damage your roof although it may decrease the effectiveness of reflective or cool roofs.
It s easy to let a mold problem sneak up on you on in out of the way places like the roof of your home.