10. The next board butts up to the last one, with both ends meeting in the center of the joist (figure F). On the next row of boards stagger the seams for a "seamless" appearance after finishing with joint compound and sanding.11. Use a small amount of joint compound in a mud tray. Use 6" drywall knife to spread first layer of mud over the joint. Fill in all the joints and dimples.
12. Cut drywall tape to length and press into the mud. Run knife over the tape at a 45-degree angle to press excess mud out of the joint (figure G).
13. Feather the mud out beyond the edges of tape for a smooth finish.
14. Layer mud on both wall and ceiling in the corners where ceiling and wall meet. Crease drywall tape and push all the way in to the corner, then feather a thin layer of mud over all edges of the tape.
15. Once dry, apply a thin second coat of mud over the first layer using 6" knife
Feather the edges as before.
16. Once the second coat is dry, apply final coat using a 10" mud knife. Layer a very thin coat of mud and feather edges 2" beyond the second coat. Allow to dry completely.
17. Sand all seams with fine grit sandpaper using a power sander with shop vac attachment (figure H).