Glazier's points are the small hidden helpers that hold glass in the window frame. When replacing a glass, glazier's points are essential to proper installation and to the future stability of the window. Just take a little care, and the average homeowner can learn how to use them.
Uncover the glazier points by removing old putty or glazing from the window frame. Start at the center of the panel and work toward the corners. Insert a putty knife or wood chisel between the glass and putty to loosen it a little bit at a time.
Look for the glazier's points, the small metal triangles that hold the glass in the frame. Some probably came out when you removed the putty or glazing, but others cling stubbornly to their spots.
Remove any stubborn points from the wood with a putty knife. Alternatively, you can use needle-nose pliers.
Insert one glazier's point on each side after you have prepped the frame and replaced the glass. Give a slight push to each point so that the glass won't fall out.
Place glazier's points at 4-inch spaces around the glass, pushing each in gently. Each point needs to lie flat against the glass.
Use the edge of the putty knife to drive each point firmly into the wood. If the wood is too hard, you may need to tap the point gently into the wood.
Push the glazier's points straight down into the wood by laying the edge of the putty knife flat against the glass. This position prevents the points from sticking out at an angle.
Slide the putty knife along the glass when driving in the points to avoid breaking the glass or gouging the frame.