However if the ducting above isn t installed properly or broken the moisture just ends up as water vapor in your attic.
Discolored plywood in attic.
The roof on the house is new but the sheathing was not replaced.
When moisture droplets collect on wood surfaces in an attic a discoloration often occurs.
I m aware of the cause poorly vented bathroom fans and not well sealed fan fixtures lights wires etc.
The black attic mold shown here confirms that this attic had a serious venting and moisture problem including moisture from sources lower in the building.
The wood has dark stains around where the old bathroom vent was pointing to in the attic the ventilation had been fixed to point outside at the time of changing the roof.
Attic stains may fall into this category depending on the severity.
This happens due to trapped damp air often in the late fall or.
The decision regarding the thickness of plywood to use for the subfloor in the attic has a lot to do with how you intend to use the attic and it also depends on the spacing of the ceiling joists.
But then i read that this could be mold.
There are a couple of boards in the pictures that i circled that are a grayish color.
Is that rotted wood.
In this photo of very dark mold in an attic in a wet attic mold which we found to be brown in the microscope looked black on the plywood.
Hello i am close to buying a house but my inspector looked into the attic and says that there is lots of mold up there.
Almost all attics in homes more than 25 years old will have some moisture stains on either the sheathing or the framing.
I thought this was a ventilation problem someone came to look at the wood and said it was fine.
Some woods are much more resistant to rot and fungal attacks.
I have surface mold on the sheathing in my 1982 vintage 12 6 pitched attic.
So i m confused the wood in the attic has black streaks discolorations.
The second variable is the species of wood used in the plywood.
Black mold in attics.
I attached three pictures.
Does mold on attic sheathing have to be removed.
The moisture from a steamy shower is routed through the fan then the attic and finally outside the house.
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.
If your attic joists won t bear the weight necessary to finish out a living space but the engineer cleared them to support floor decking for light storage you can install inch plywood or.
