How to Spackle Drywall Corners


Drywall is the most versatile building material used in the interior construction of modern-day homes. It is an inexpensive wall covering material that can be papered, painted or covered with some other types of decorative wall covering. Taping and spackling corners are among the finishing touches necessary for drywall before applying the final decorative covering. Outside corners are especially visible and demand careful work.

Things You'll Need

  • Outside corner spackle knife
  • Pre-mixed spackle
  • Spackle mixer
  • Outside corner drywall bead
  • Fiberglass drywall tape
  • Drill driver
  • Drywall screws
  • Drywall sandpaper
  • Drywall hand sander
  • Attach an outside corner drywall bead to the corner to be finished, using drywall screws and the drill driver.

  • Tape the outside corner from top to bottom in a single run of drywall fiberglass tape. Cover one half of the corner bead with the first run of fiberglass tape, then cover the second half in another single run of fiberglass tape.

  • Mix the drywall spackle compound with the drywall mixer until consistency is smooth and resembles cake batter. Spackle should be mixed until there are no visible lumps or discoloration in the spackle.

  • Dip the outside corner spackle knife into the spackle and load the tip of the corner knife. Starting at the top of the corner, apply the spackle over the corner. Cover the fiberglass tape with smooth, even strokes.

  • Continue to apply spackle from top to bottom until the entire corner is evenly covered. Allow the spackle to dry completely. Spackle will turn a chalky white when completely dried.

  • Sand the spackle with the drywall-mud sandpaper and hand sander. Continue to sand until the corner has a smooth finish.

Tips & Warnings

  • Keep spackle tools clean to help ensure a smooth application of drywall spackle.
  • Wear a face mask when sanding drywall mud and spackle, to prevent inhalation of spackle dust.

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  • Photo Credit drywall worker image by Sherri Camp from
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