How to clean mold off a roof.
Gray fungus on roof.
External mold is just as serious as mold inside the home.
Unlike its fungi counterparts mildew spreads extremely fast in warm and wet places.
Our photo at right and our two moldy asbestos pipe insulation pictures below all show black and gray mold colonies as smaller spots growing on the painted surface of cloth covering asbestos pipe insulation.
Mold or mildew makes black ugly streaks on a roof.
Here we discuss the causes of algae moss lichens or fungal growth on roof shingles the effects of these conditions and how to cure or prevent them.
Light grey pink or black.
Identifying removing preventing algae fungus lichens moss on roof shingles.
Photos and text guide diagnosis of asphalt roof failures how to identify and explain roof shingle failures obtain claims.
This includes roofs that don t have proper drainage systems in place.
This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.
You can spot this nasty fungus due to its wide color range.
Not only is it unattractive it can actually shorten the life of your shingles so you really should get rid of it.
You ll want to remove mold from the outside of your house on siding or on your deck as soon as possible.
In the vast majority of cases the mold growth is caused by condensation.
When it rains a slight amount of zinc dissolves from the strips and coats the roof inhibiting algae and fungus growth.
If you wish to prevent reoccurrence of fungus think zinc.
These are probably not good things for.
A visual inspection of the backside of the ceiling is the only way to properly identify the extent of the mold growth.
The opposite is true for roof leaks pipe leaks etc.
The last one we will discuss is mildew which like mold is very dangerous if left to fester and grow.
Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.
The mold itself may have a cottony texture but can also be velvety.
Far more mold growth may be present on the backside of the sheet rock than the side facing the room.
Zinc strips left have been used for many years as an algae preventative.
It s a combination of algae and fungus and usually has a light mint green color.
It doesn t trap as much water against the surface of the roof as moss but it can be acidic and has strands that can penetrate into the shingles.
Asphalt roof shingle defects.
External mold can do significant damage to exterior surfaces over time eating away at wood stucco and other materials.
Mold on in attics and attic surfaces roof sheathing the photographs below illustrate mold growth on plywood roof sheathing.
