Attic Plywood Black
The second variable is the species of wood used in the plywood.
Attic plywood black. When this seepage occurs it can often go. It is also a potential breeding ground for black mold because it is often hot and humid and there is a potential for water seepage. Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. You can effectively kill mold on wood in your attic using moldstat mold killer by soaking the mold growing on the trusses and plywood and allowing it to stay wet for at least 10 minutes then air dry.
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. This summer i cleaned the portion of the black stain with a dry mop as much as i could reach from the hatch opening. You have mold that should be removed. The mold killer solution can be applied using a pressurized sprayer or for deeper penetration the fogmaster mold fogger.
The following picture is of a long standing moisture condition in an attic where much of the roof sheathing has turned black. This can be caused by the action of fungal growth and molds and the affect they have on the tannins in the wood. If the mold growth is thick may need to soak the trusses and plywood. Black mold in attics.
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. Some woods are much more resistant to rot and fungal attacks. Attic feels excessively hot or stuffy attics should feel breezy if they are properly ventilated. The presence of mold inside your home even if it.
Last winter i took a look into the attic and noticed black stains and water marks on a portion of the sheathing material. The attic is one of the parts of the home that is not frequently visited especially if it is difficult to access. 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. Does mold on attic sheathing have to be removed.
When moisture condenses on plywood roof sheathing repeatedly or continuously the wood will turn black.