My son and I started hanging 100 sheets of drywall about a month ago. He had never done this task before and picked it up ...
It's best to cut a few inches above and below the damage. Then, score along the sides of the corner bead with a utility knife ...
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How To Cut Drywall Like a Pro
But outside corners that get metal corner bead (Photo 10) are a different story. There, drywall joints should ... vulnerable ...