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BEFORE You Start...
Skill Level & Time to Complete
Beginner - 4 hours
Intermediate - 3 hours
Advanced - 2 hours
- Be careful not to over-sand.
- Sanding drywall compound is a messy, dusty job. Close doors or hang thin plastic sheeting in doorways to prevent dust from drifting to other parts of your house.
- Drywall compound can dry out and/or separate in its container during storage. You may need to mix it up a bit and possibly add a little water. You want a smooth and moist consistency, but not too wet.
- Instead of dispensing the compound directly from the pail, use a plastic trough, which will allow you to move around faster and easier.
Wallboard Joint Compound
Sandpaper and sand screens
Using tin snips, cut corner bead and tack in place with nails spaced about 5” apart through the holes manufactured into the bead. The bead is designed to protect the outside corners of your room from dents.
On the outside corners, apply compound from the trough with passes toward the bead. Scrape off the excess in a downward stroke with the edge of the blade extending beyond the corner.
At the end of walls, apply compound in-between the two corner beads. Slide your knife down the beads to smooth.
Apply a thin coat of compound to the corner area wide enough to extend past the width of the tape. Using your knife, embed paper tape in compound.
Next, cover with compound on one side, and when it has dried, coat the other side. Use a corner knife to apply second and third coats with a light sanding in-between coats. Make sure to wear a dust mask whenever you are sanding.
Unroll sticky mesh tape across the seam where two tapered panel edges meet. Firmly smooth into place.
With a 4” knife, apply a uniform swath of compound to the tapered trough between the panes.
Fill nail dimples and other blemishes at this time. Pack in a dab of compound, and then level the surface with the knife.
Give the initial coat 24 hours to completely dry, then lightly sand any rough edges.
Give the seams another coat, this time feathering out to 6”. Again, lightly sand any rough edges.
On the last coat, add a little water to the joint compound for a thinner consistency. Using a wide knife, feather the final coat out to 12”. Now just finish the job with a light sanding over every area with compound.