Hi guys
I have joined 2 halls together by removing a doorway.
One hallway is 10ml Fibrous plaster about 40 years old and the new hall is 10ml plasterboard to matchthe thickness.I cut a piece of timber and nailed it up as a backing.
Then I nailed up the 10ml plasterboard in a butt join for the new hallway.
I then used fiberglass tape,2 layers of base coat then a finalfinish coat.
It looked great until it developed a hairline crack a week later.
I put another layer of finnish coat on but it cracked again later.
Any ideas guys?
thanks
Micko