12' × 12' Bedroom Drywall & Sheetrock Takeoff
A standard 12' × 12' bedroom with 8-foot ceilings requires covering 384 sq ft of gross wall surface and 144 sq ft of ceiling. Deducting a standard 30" × 80" entry door (21 sq ft) and two standard double-hung windows (15 sq ft each) results in 477 net square feet of sheetrock. Incorporating a standard 10% waste buffer yields approximately 17 sheets of 4' × 8' ½" drywall, two 4.5-gallon buckets of all-purpose joint compound, 250 linear feet of paper joint tape, and a 5 lb box of 1-¼" coarse thread drywall screws.
Room Dimensions & Openings
Contractor Trade Best Practices & Code FAQs
Should drywall be hung horizontally or vertically in residential rooms?
In standard residential construction, drywall is almost always hung horizontally across the framing studs. Hanging sheets horizontally creates fewer linear feet of seams (up to 25% fewer joints to tape and finish) and ties more wall studs together structurally, reducing future truss uplift cracks and framing twist.
Do you drywall the ceiling or the walls first?
Always drywall the ceiling first! When ceiling sheets are fastened tight to the joists, the top row of wall drywall sheets butts up underneath the perimeter edges of the ceiling panels, physically supporting the ceiling perimeter and creating a crisp, supported 90-degree corner joint.
How many buckets of drywall mud are needed for a 12x12 room?
For a 12x12 bedroom (~477 net sq ft of board), you will need roughly 5 gallons of joint compound. The industry recommendation is to purchase two 4.5-gallon buckets: one all-purpose compound with high vinyl binder content for bedding paper tape, and one lightweight topping compound for smooth, easy-sanding 2nd and 3rd skim coats.