Black Spots On Plywood In Attic

Does mold on attic sheathing have to be removed.

Black spots on plywood in attic.

Or is a little bit of mold okay if the sheathing is drying out each summer and it. Black marks on ceiling. When this seepage occurs it can often go. There did not appear to be any mold or mildew on the surface but i could see black spots.

Last winter i took a look into the attic and noticed black stains and water marks on a portion of the sheathing material. If the wood is soft if it s easily imprinted when you push on it it s probably rotten. Do i have a minor or major problem here. 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.

Mold is not always easy to see most of the time it is of a different color than the material it is on but if you have painted the osb a dark color it may be difficult to spot. I m aware of the cause poorly vented bathroom fans and not well sealed fan fixtures lights wires etc. When moisture condenses on plywood roof sheathing repeatedly or continuously the wood will turn black. Do i need to rip the siding and sheathing off and put a rain screen on.

This can be caused by the action of fungal growth and molds and the affect they have on the tannins in the wood. The following picture is of a long standing moisture condition in an attic where much of the roof sheathing has turned black. No moisture detected and the roof is new. Black flex gas line.

Uninsulated attic hatches are a common spot where heated air escapes into an attic. Are these just stains. The attic is one of the parts of the home that is not frequently visited especially if it is difficult to access. After a long winded background my question is.

Black mold in attics. Use a flashlight and shine the beam along the surface of the osb this will reveal the mold no matter what the color due to it being three dimensional. The plywood and the insulation felt dry but there were definitely a few sporatic black spots of mold. The house was thirty years old.

Stains on the interior walls. 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. In old houses you ll usually see some spots that are stained dark or black where there was a roof leak at some point in time which was repaired but the stain remains. This summer i cleaned the portion of the black stain with a dry mop as much as i could reach from the hatch.

Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. This was on the under side of the roof decking. The presence of mold inside your home even if it.