How to Cut Square Edges for Drywall

Drywall novices often neglect to ensure that the lines they score while cutting drywall are straight. Consequently, they end up with pieces that might appear to have square edges but actually do not. Square edges allow drywall boards to lie flush against each other and the edges of walls and ceilings. But if the drywall you install has uneven edges, the room likely will have large gaps. You then must fill each gap with joint compound to hide it -- a waste of time, labor and materials. The most effective way to ensure square edges is to use a drywall T-square.

Measuring tape
Drywall T-square
Pencil
Utility knife

Instructions

- 1
  Measure the installation location.
- 2
  Rest the board of drywall against a stable surface.
- 3
  Use a measuring tape and pencil to mark the desired cutting length on the board. Make the mark near the top of the board on the side that is facing you.
- 4
  Hang the T-square over the edge of the board so that the longer section dangles toward the floor.
- 5
  Slide the T-square over until the pencil mark lies just to the right of the longer section.
- 6
  Hold the T-square stable with one hand while you run the pencil down the edge of the T-square to extend your original mark down the board. When you finish, you should have a clearly visible line.
- 7
  Use a utility knife to score the paper along the line. Work slowly.
- 8
  Snap the board at the line by applying pressure.

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