Hi, About 2.5 years ago, A contractor finished off the attatic space in my home. To run plumbing, an access hole was created in the living room ceiling on the 1st level. The access hole was repaired using new drywall (about 12 quare feet) and finsihed and painted.
Fast forward 2.5 years latter and almost overnight, the drywall tape on 3 sides are delamanating. As far as I can tell this is not due to any water damage from leaks.
My questions are.
1) What could cause this and why did t take 2.5 years for the tape joints to fail?