Discolored Plywood In Attic

So i m confused the wood in the attic has black streaks discolorations.

Discolored plywood in attic.

I thought this was a ventilation problem someone came to look at the wood and said it was fine. But then i read that this could be mold. Attic stains may fall into this category depending on the severity. Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored.

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. Does mold on attic sheathing have to be removed. I have surface mold on the sheathing in my 1982 vintage 12 6 pitched attic. 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.

The roof on the house is new but the sheathing was not replaced. In a reasonably well insulated and vented attic stains may appear due to condensation. I m aware of the cause poorly vented bathroom fans and not well sealed fan fixtures lights wires etc. 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.

The moisture from a steamy shower is routed through the fan then the attic and finally outside the house. Black mold in attics. 905 290 9101 british columbia lab. Almost all attics in homes more than 25 years old will have some moisture stains on either the sheathing or the framing.

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. However if the ducting above isn t installed properly or broken the moisture just ends up as water vapor in your attic. I attached three pictures. 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.

This happens due to trapped damp air often in the late fall or. 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. The presence of mold inside your home even if it.