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Steps for straightening a window:

  • Use a utility knife to score the window casing from the wall and from the jamb.
  • Carefully pry the casing away from the wall.
  • Cut a small amount of the wallboard with the utility knife to see the rough opening.
  • Place shims in the gap between the window and the rough opening. Repeat this process on the other side of the window until the window becomes parallel again.
  • Check the window for parallel by measuring the width of the window at the top, middle, and bottom. If the measurements aren’t equal, adjust the shims accordingly.
  • Nail the window and the shims to the rough opening using a nail gun.
  • Cut the excess from the shims off with a utility knife.
  • Fill the gap between the window and the rough opening with spray foam insulation designed for windows and doors.
  • Reattach the casing with wood glue and the nail gun.

Resources:

The materials Tom used to fix the window gap, including shims, the hammer, and the utility knife, can be found at home centers.


Tools: