How do i 'fix' wet through contained by my sons' bedroom? their bedroom wall is covered in it

their bedroom wall is covered in it
Answers:    You really inevitability to figure out what is cause the dampness and fix it a bit than cover it up. Drywall can and will form mold behind it tremendously easily and it can raison d`¨ētre many vigour problems. It can also promote getting silverfish. Anything you do to cover it will just hold the same problem again. Call around for a contractor to pass you some estimates. It may cost more, but you don't want to risk putting your son in a room breathing toxic mold spores.
you can use a spary sealer that stops moisten coming through paint or wall paper. Easy to draw from from places like bnq.
But you clearly own a problem that you need to catch checked out.