I closed a skylight and floated the ceiling level. A few months later it started cracking and falling, why? I don't think it was too thick.

  • 3
    Is it cracking directly off the paper of the drywall? If so, I'd suspect dust interfered with the bond. Are there any signs of moisture intrusion? Dec 12 '19 at 3:59
  • Does the roof move? under wind load or snow load etc?
    – Solar Mike
    Dec 12 '19 at 7:45
  • Hello, and welcome to Home Improvement. Would you add a picture of the damage? Dec 12 '19 at 12:18
  • I agree with aloysius dust can be a leading cause, also mud that is dry , on pre mix work any water back in that has separated and sometimes more is needed.
    – Ed Beal
    Dec 12 '19 at 15:08
  • Was there some grease? (Example: one of my children played a game, dip Q-tips in vaseline, toss in the air, watch them stick to the ceiling. I ended up with a greasy ceiling.) Dec 15 '19 at 16:28

Mud is pretty forgiving as regarding 'stickiness' but it won't cope with much movement, usually expansion and contraction will cause cracks.

  • Could be the materials you used have dried out (framing shrinking etc.).
  • Could be temperature related; i.e. expansion/contraction. Did you insulate the space over the drywall?

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.