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.
Mold on roof of house.
Mold stains can form on roof shingles that are in permanent shade.
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.
These stains will discolor your roof and damage the shingles over a period of time if left alone.
At worst they can pose serious health risks.
Just because you can t see it however doesn t make it any less dangerous.
Not to worry though because you can clean the mold off with basic household bleach and save your roof long before you need an expensive replacement.
Algae is often mistaken for roof mold according to the asphalt roofing manufacturers association.
Mold and mildew growth.
Extensive mold growth can also expose the interior of your attic or crawlspace to mold spores carrying the problem over to the inside.
Mold growth on roofs is one of the most costly problems when homeowners fail to take action and simply allow the growth to continue.
At best slimy black mold deposits are an eyesore.
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.
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.
When it comes to the structural integrity of the roof on any given house roof algae and mold are two of the biggest enemies.
Algae on the roof is not nearly as problematic as mold though.
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.