Backstory: We had a leak in our roof that damaged some of the ceiling drywall. When we put new drywall up, the pre-existing drywall "sagged" a bit lower than the fresh piece that was screwed into the ceiling joists. Because of this, I layered the joint compound so that the two would be as level as possible.
In the latest coat of joint compound, the compound is showing small cracks that I assume happen while it is drying (and shrinking?).
- I've read elsewhere not to use sandpaper but some sort of sanding sponge. Confirm or Deny?
- Do I need to use a different product to fill these gaps?
- Would this be caused by too thick of a coat of joint compound?
- What is the best way to build it up so that next time I can do this right?