Woodworking For Dummies
Book image
Explore Book Buy On Amazon
The trickiest part of replacing broken glass panes in wood-frame windows is getting replacement glass that’s sized exactly right. To replace a broken glass pane in a wood window, you need to measure the precise length and width of the grooves in which the pane will fit.

Have the new glass cut so it measures 1/8 inch shorter than the exact groove dimensions in both the length and width. This creates a 1/16-inch gap on each side between the edges of the pane and the rabbet groove. The gap provides room for the glass to expand when the weather changes.

In addition to the replacement glass pane, you'll need: latex glazing putty; metal glazing points; pliers; a heat gun; flexible putty knife; 1- or 2-inch, stiff, steel, putty knife; and a flathead screwdriver.

Also check out these other articles on replacing broken window panes in: steel-casement windows; sliding-sash windows; and metal storm windows.

Use the pliers to remove all of the glass shards.

Use the pliers to remove all of the glass shards.

When you work with broken glass, wear safety goggles as well as gloves; small chips of glass can cause permanent eye damage.

Use the heat gun to warm the old putty; and then scrape it away with a putty knife.

Use the heat gun to warm the old putty; and then scrape it away with a putty knife.

If the putty doesn’t lift off easily, apply more heat and try again. Be patient — the putty around really old windows is as hard as concrete, but it will soften.

Don’t chisel out the old putty — you might wreck the window. The putty will soften with enough heat and time.

Use a putty knife or the tip of a screwdriver to remove the old glazing points.

Use a putty knife or the tip of a screwdriver to remove the old glazing points.

The points will be buried under the old putty.

Clean and inspect the rabbet groove.

Clean and inspect the rabbet groove.

Ensure that no glazing putty, glass shards, or glazing points remain.

Apply a bead of putty on the glass side of the rabbet groove.

Apply a bead of putty on the glass side of the rabbet groove.

Squeeze out a 1⁄16-inch bead of putty between the edge of the glass and the window frame.

Gently press down the glass at the edges to embed the glass into the putty.

Gently press down the glass at the edges to embed the glass into the putty.

Allow the putty to spread out and form a moisture seal on the inside of the window between the glass and sash.

Position the new pane in the rabbets.

Position the new pane in the rabbets.

Shift the pane until you have a 1/16-inch gap between the pane and sash on all four sides.

Place at least two new glazing points in each section of the window sash surrounding the new glass.

Place at least two new glazing points in each section of the window sash surrounding the new glass.

Space the points evenly around the perimeter, about 6 inches apart.

Use the flat side of a putty knife to push one corner of each triangular glazing point into the wood sash.

Use the flat side of a putty knife to push one corner of each triangular glazing point into the wood sash.

You can use a screwdriver blade instead of a putty knife.

Form a 1/2-inch-thick rope of putty and press the length along all four sides of the glass.

Form a 1/2-inch-thick rope of putty and press the length along all four sides of the glass.

Roll a glob of putty between your bare hands to form the rope.

Smooth the glazing putty and scrape away the excess.

Smooth the glazing putty and scrape away the excess.

Hold the putty knife at a 45-degree angle, press, and smooth the glazing putty against the glass and sash.

After the putty dries completely, repaint the putty and repaired area.

After the putty dries completely, repaint the putty and repaired area.

Don’t mask off the glass before repainting. The paint will help form a moisture seal between the glass pane and the sash. So, allow the paint to overlap about 1/8 inch onto the glass.

About This Article

This article is from the book:

About the book author:

Jeff Strong is a renaissance man with experience in the fields of percussion, woodworking, recording, and neuro-developmental disabilities. He is the director of the Strong Institute—an auditory brain stimulation research organization—and creator of Brain Shift Radio, an interactive brain stimulation music site. He has been a drummer for over 40 years and has released dozens of CDs.

This article can be found in the category: