Plywood In Attic Is Black

This summer i cleaned the portion of the black stain with a dry mop as much as i could reach from the hatch opening.

Plywood in attic is black.

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 condenses on plywood roof sheathing repeatedly or continuously the wood will turn black. This can be caused by the action of fungal growth and molds and the affect they have on the tannins in the wood. Some woods are much more resistant to rot and fungal attacks.

Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. 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. 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 presence of mold inside your home even if it.

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. Plywood is made of layers of thin sheets of veneer in alternating wood grain directions which increases the strength and stiffness of the final panels while providing superior dimensional. The second variable is the species of wood used in the plywood.

Last winter i took a look into the attic and noticed black stains and water marks on a portion of the sheathing material. 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. Plywood is a powerful structural product used where plywood is a powerful structural product used where strength and stiffness are required for subfloors wall or roof sheathing and do it yourself projects. Without proper ventilation in the attic high heat and humidity can build up which leads to moisture from a different source.

The following picture is of a long standing moisture condition in an attic where much of the roof sheathing has turned black. Black mold in attics. After several years of this there may be.