Water stained or blackened wood.
Blackened wood in attic.
A sign that condensation is forming on metal surfaces.
If you re not sure what you re looking for here s a picture of mold in an attic.
The mold itself may have a cottony texture but can also be velvety leathery or.
The roof has baffles at alternating thusses soffit and ridge vents.
Some woods are much more resistant to rot and fungal attacks.
The following picture is of a long standing moisture condition in an attic where much of the roof sheathing has turned black.
In most cases testing for attic mold is unnecessary.
When moisture condenses on plywood roof sheathing repeatedly or continuously the wood will turn black.
Click photo for larger image.
A sign of mildew or rot.
High humidity in a space like an attic can lead to mold and a spill in a carpeted area of your home that isn t quickly taken care of can also lead to mold under the carpet.
If you have either ice dams or moisture buildup improve your attic ventilation.
Even if conditions are conducive to mold growth elevated moisture plywood made from a fungal resistant wood will resist mold growth for quite a while.
And just because you can t see that mold doesn t mean it s not dangerous.
This latter phenomenon occurs when the house is too humid and the warm moist air seeps into the attic where it condenses and freezes on cold attic areas.
A sign of roof leaks from ice damming or other causes.
Mold usually causes a musty odor and may cause staining that may be black brown gray white yellow or green.
This can be caused by the action of fungal growth and molds and the affect they have on the tannins in the wood.
On attic mold visible on pine tongue and groove roof sheathing near the building eaves.
Also notice the condensation stains at the shingle nail more evidence of a history of attic moisture which was a factor in this mold growth.
It usually appears greenish black and streaky.
The attic is truss framed with plywood sheathing.
You can also spot this in the summer.
However there are many different types of mold so if the mold in your attic looks different that does not mean you don t have a problem or don t need to worry about it or take action.
After several years of this there may be.