Discolored Plywood In Attic

Almost all attics in homes more than 25 years old will have some moisture stains on either the sheathing or the framing.

Discolored plywood in attic.

The presence of mold inside your home even if it. I m aware of the cause poorly vented bathroom fans and not well sealed fan fixtures lights wires etc. Black mold in attics. 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.

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. I attached three pictures. I thought this was a ventilation problem someone came to look at the wood and said it was fine. However if the ducting above isn t installed properly or broken the moisture just ends up as water vapor in your attic.

Attic stains may fall into this category depending on the severity. There are a couple of boards in the pictures that i circled that are a grayish color. Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. In a reasonably well insulated and vented attic stains may appear due to condensation.

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. When moisture droplets collect on wood surfaces in an attic a discoloration often occurs. 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 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. The second variable is the species of wood used in the plywood. 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. The moisture from a steamy shower is routed through the fan then the attic and finally outside the house. Some woods are much more resistant to rot and fungal attacks. This happens due to trapped damp air often in the late fall or.

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