Black Markings On Attic Sheathing 2017

When moisture condenses on plywood roof sheathing repeatedly or continuously the wood will turn black.

Black markings on attic sheathing 2017. The mold is likely coming from a condensation buildup along your soffet a good trick would be to get in there and attach cut foam blocks at the top of your wall cavity up to the roof deck to seal the soffet of from the attic space wherever cooler and warmer air mix there will be condensation. The dark stains on roof sheathing can usually be traced to one of two things. Do you know if this product contains asbestos or a wood product. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest.

This summer i cleaned the portion of the black stain with a dry mop as much as i could reach from the hatch opening. Something else you can do to help is get. Fiberboard sheathing is normally a cellulosic product that is made from wood fibers. This can be caused by the action of fungal growth and molds and the affect they have on the tannins in the wood.

After several years of this there may be. 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. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate. The following picture is of a long standing moisture condition in an attic where much of the roof sheathing has turned black.

In the attic photograph at left we show a mix of green gray and white attic mold. Doing some remodeling and we found this under the drywall georgia pacific regular sheathing ps 57 and astm c 208 black board. When looking for attic mold trace both leak. The photo at page top shows white attic mold on the roof sheathing and rafters and some brown or black mold on the attic side of ceiling drywall where we pulled back insulation.

Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. In the vast majority of cases the mold growth is caused by condensation. Mold on attic sheathing. Does mold on attic sheathing have to be removed.

Fiberboard sheathing is a wood product.