It is also known by its drug name, Celecoxib. Celebrex is used to treat pain, stiffness and discomfort caused by lupus in joints and other tissues. Unlike other drugs in its class, Celebrex does not interfere with blood clotting. Celebrex should not be used by people who are allergic to nonsteroidal anti-inflammatory drugs (NSAIDs) such as Aspirin or Ibuprofen.
Installing new drywall on the walls and ceiling of a 12x12-foot-room with 8-foot-high walls means about 530 square feet of drywall. For about 4,000 square feet of drywall on all the walls and ceilings of a small home, it's $4,400-$8,600 or more.
I think that is what he quoted in the very beginning. He said - lots of variability due to weather before drywall but you can usually count on 2 months after drywall to be completed. But he also only took 2 months before drywall so the 1/2 way point worked out. But there is definitely more variability in the first 1/2.