We have a tiny bit of water damage, not even a stain, to our ceiling. This has caused the paper at a join to droop for about 4". Can I simply squeeze paper glue into the drrop and stick back up? Is thier likley to be bare plaster board directly under the paper (which may stop the paper glue from beinig effective? House is about 6 yrs old.
Cheers
Dave
Cheers
Dave