Things You'll Need:
- Utility knife
- Hammer
- Sheetrock tape
- Joint compound
- Putty knife
- Sandpaper
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Step 1
Remove the strip of damaged sheetrock from the wall. Use a utility knife to cut the paper loose if part of it is still attached.
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Step 2
Trim the long side of the sheetrock just slightly, making it even so you don't have to force it back into the opening.
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Step 3
Cut the split and damaged sheetrock from the ends, squaring off the top and the bottom of the piece. You don't want to leave the damaged pieces, because they will create an uneven surface below the new door trim.
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Step 4
Replace the sheetrock in the hole, tapping it lightly into place with a hammer. You'll be left with an open hole where the damaged part was removed.
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Step 5
Tape over the seam and the hole from the damaged area. Use a putty knife to float joint compound over the tape.
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Step 6
Sand it when dry. This will give you a smooth surface to install the trim.











