humidity stains on drywall from storage

amakarevic

I have about a dozen sheets of drywall that have been stored in the basement for a couple of years and they have some humidity damage near the bottom side (the basement is dry but i have had two-three mini floods doing plumbing work). The parts that have stains are still as firm as the rest. Is this still usable or should i cut the stained edge?

Thanks

joecaption

That's about the last place to be storing drywall.
What colors the stains?
No good way from here to suggest something, if it was mine and it was stained I'd figure it was mold and trash it instead of having to deal with paint issues and spreading mold in a room.

amakarevic

grayish.

but if i cut out the moldy belt near the bottom, i should be fine, yes or no?

joecaption

Sure looks like black mold to me.
I would toss them in the trash.

amakarevic

but most of each panel is as clean as brand new. why not just cut off the moldy parts?

Seattle2k

Hey, the choice is yours. That looks like black mold to me. Fortunately, it just appears to be surface mold (however, I can see the end of the panel, nor the inside of it). Surface mold can be cleaned with bleach, or you can cut the bad part off...just like cheese. On the other hand, drywall is pretty cheap to replace.

bjbatlanta

I agree, if it's basically "sound" and the core is still solid, the choice would be yours as to whether you want to take a chance and try to "clean up" the mold, cut it off and use the rest of the sheet, or just trash it. You may want to go to the EPA website and check out the hazards of mold before deciding.....

__________________
If you can read this, thank a teacher. If you can read this in English, thank a soldier. Support our troops.