How to Cut the Corner Angles of Window Frames

One of the last steps in installing a new window is to install the molding around the window frame. To provide a clean, uniform edge around the perimeter of the frame, this is done by using miter cuts to cut the edges of the frame at a 45-degree angle. This is a basic woodworking skill that can be accomplished by a novice do-it-yourself homeowner.

Things You'll Need

• Tape measure
• Miter box and saw
• Clamps

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Instructions

1. • 1

     Measure and mark the length of the window trim on the outer edge of the molding.

   • 2

     Place the molding into the miter box and clamp it down.

   • 3

     Position the saw to make a 45-degree cut, with the saw blade positioned over the mark that indicates the needed length of the molding.

   • 4

     Saw through the molding.