WTF is living on our house?
April 12, 2011 7:45 AM Subscribe
Is this mould? We're stripping down our bedroom to redecorate. We've found these yellow blobby stains
on bare unpainted plasterboard (drywall for Americans) behind the old fitted wardrobe.
posted by tweemy to Home & Garden (11 answers total)
It's mainly contained to one entire piece of plasterboard (upstairs, inside of an outside wall, away from window, no leaks from above), though there are small blotches where overhead cupboards were. There's no spots or marks on painted areas, even the small amount on the vertical join.
We've tried bleach and rubbing it down, and neither have shifted the marks which makes me think it might not be mould. We don't want to cut out the whole piece of plasterboard and replace if we don't have to, as that means hiring a professional - and not having a bedroom for a few more weeks than we planned!
Even if it's not mould, we'd like to try and figure out what it is. Any ideas?