"Ron" wrote in message

No special primer is needed for semi-gloss, again, just buy quality
primer.

I think you have 640 square feet
(31+9+31+9) X 8 = 80 X 8 = 640

Wrong. Do the math again but first, re-read the requirements
And last of all, the room is 31 ft x 9 ft, with 8 ft ceilings, I need to
cover 919 sq ft of walls and ceiling, is that correct?


Primer is always best over new drywall.