Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored.
Black spots on plywood in attic.
Uninsulated attic hatches are a common spot where heated air escapes into an attic.
The attic is one of the parts of the home that is not frequently visited especially if it is difficult to access.
Stains on the interior walls.
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.
The plywood and the insulation felt dry but there were definitely a few sporatic black spots of mold.
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.
Do i need to rip the siding and sheathing off and put a rain screen on.
Black mold in attics.
Black marks on ceiling.
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.
There did not appear to be any mold or mildew on the surface but i could see black spots.
This was on the under side of the roof decking.
I m aware of the cause poorly vented bathroom fans and not well sealed fan fixtures lights wires etc.
If the dark surface of the wood smudges it could be mold.
Or is a little bit of mold okay if the sheathing is drying out each summer and it.
When this seepage occurs it can often go.
The house was thirty years old.
When moisture condenses on plywood roof sheathing repeatedly or continuously the wood will turn black.
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.
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.
This summer i cleaned the portion of the black stain with a dry mop as much as i could reach from the hatch.
Last winter i took a look into the attic and noticed black stains and water marks on a portion of the sheathing material.
Black flex gas line.
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.
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.
I have surface mold on the sheathing in my 1982 vintage 12 6 pitched attic.
After a long winded background my question is.
Are these just stains.
