Black Markings On Attic Sheathing 2017

Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored.

Black markings on attic sheathing 2017.

This can be caused by the action of fungal growth and molds and the affect they have on the tannins in the wood. Excessive humidity inside the house making its way to the attic where it then condenses on the structural members. When moisture condenses on plywood roof sheathing repeatedly or continuously the wood will turn black. 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.

Do you know if this product contains asbestos or a wood product. The following picture is of a long standing moisture condition in an attic where much of the roof sheathing has turned 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. In the attic photograph at left we show a mix of green gray and white attic mold.

Something else you can do to help is get. When looking for attic mold trace both leak. Last winter i took a look into the attic and noticed black stains and water marks on a portion of the sheathing material. This occurs when the temperature of the sheathing drops below the dew point creating a thin layer of moisture on the substrate.

The dark stains on roof sheathing can usually be traced to one of two things. 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. Doing some remodeling and we found this under the drywall georgia pacific regular sheathing ps 57 and astm c 208 black board. Fiberboard sheathing is normally a cellulosic product that is made from wood fibers.

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. Mold growth on attic roof sheathing is a common issue in cool climates such as the pacific northwest. Mold on attic sheathing.

Fiberboard sheathing is a wood product.