Window Glazing Guide: How Much Does It Cost & More

Are the windows of your house old and drafty? Your window glazing could be the culprit. Faulty glazing may not be keeping your wooden windows weathertight.

What is glazing on a window?

Glazing is the glass part of a wall or window. It refers basically to the window panes that are installed within the wooden window frames. These are mounted on the surface of a window sash.

The idea behind window glazing is to make an airtight, weathertight seal between the window glass and the wood sashes on the exterior of a window.

This process is essential when replacing the glass in a damaged or broken pane.Read more: Home window replacement financing & loans

What is the difference between glass and glazing?

While glass — a transparent substance made by melting sand with a mixture of soda, potash, and lime — can be used anywhere, glazing is strictly the glass part of a window, door, or wall.

If you live in an older house, chances are your window glazing has deteriorated over time, causing loose glazing or cracks in the putty. Before it falls off or cracks beyond repair, you need to reglaze the window. Otherwise, the windows of your house will be vulnerable to the effects of water and rot, and not be as energy-efficient as they should be.

Want to know more about the types of glazing? Click the link for a complete guide.

Why is window glazing important?

Window glazing minimizes heat transfer, heat loss, and air leakage. Therefore, it helps cut down on your energy consumption — making your home more energy-efficient. It even lowers condensation on your windows.

Glazing a window is one of the best things home dwellers can do to maximize the energy efficiency of their home. Needless to say, poorly functioning windows are one of the biggest reasons for heat loss. It’s best to fix any window problem as quickly as possible and prevent further harm.

Depending on the extent of the damage, you may want to hire a professional glazier to do the job for you. Some windows, such as historic windows, require special treatment to maintain their original character while still improving their performance. You might need help finding the right fit that preserves the character and style of the house.

Plan your window installation right. Try our estimator tool today.

Window glazing: the process

Whether you’re reglazing windows as part of a home improvement or because of a crack, you’ll have to seal between the glass and the wood frame with putty — the glazing material.

Traditional glazing is a fairly simple process. You’ll need a handful of the well-kneaded glazing compound and a putty knife. The knife helps in creating perfect putty bevels against any muntin profile or glazing bar. You can even cut sharp corners — leaving your window looking neat.

Keep in mind that if the sash is still in the window opening, or the cracked pane is still intact, it’s best to remove the putty first and then the glass.

Here’s a brief overview of the steps to glaze a window:

Remove the old glazing putty. A heat gun can help soften hardened putty for easier removal.
Extract any glazing points and gently lift out the damaged glass (if replaced).
Measure the opening carefully and cut a new pane if needed.
Insert new glazing points to secure the glass.
Apply the glazing compound. Roll it in your hands until it is soft and press it into the window frame.
Bevel the putty with a knife for a clean, sloped finish that sheds water.

You can also find other window glazing removal tools in your local hardware store.

However, keep in mind that since window glasses are fragile the glazing points that hold the glass in place may act as pressure points. You need to be as gentle as possible and keep the glass from breaking.

Take a look at our guide on Hiring A Professional Window Cleaner For Your Home

How long does it take the window glaze to dry?

You can glaze or reglaze a window with either oil-based or water-based glazing. While oil-based window glazing is considered old-school and takes longer to dry, water-based window glazing is more modern and dries more quickly.

Oil based glazing needs around 30 days to dry before you can paint the window. In comparison, a water-based window glazing takes just about three to seven days. The duration is shorter if you’re using exterior latex paint and longer if you’re using oil-based paint.

Which is the ideal putty for glazing?

There are three types of glazing compounds. You can opt for the traditional, hard linseed oil putty, modified oil-type glazing compounds (semi- or non-hardening), or acrylic glazing compounds (can be either hardening or elastomeric and flexible).

Ensure that you choose a putty that gives long-term performance and can be easily removed or renewed in case it deteriorates.

Your window installations are important. Get the best estimate with us.

How long does window glazing last?

The lifespan of your window glazing depends on the type and quality of materials, the professionalism of the installer, the location of the window, and its wear and tear. Generally, a double-glazed window will last between 10 and 35 years.

How much does it cost to reglaze a window?

A typical window repair costs between $160 and $520. The average cost to reglaze a window would run about $330. There are various factors that influence the price of window restoration. These include the type of window and frame material, the type of glass pane, the extent of the damage, and the total number of windows.

Calculate the cost of your window replacement process with our free estimator tool.

Final thoughts

Perfect window glazing is all about paying attention to detail, using the right tools, and selecting high-quality materials. Whether you’re refreshing a few panes or restoring an entire set of historic windows, proper glazing improves your home’s energy efficiency, comfort, and appearance. Don’t forget the power of the heat gun when removing stubborn old putty, and choose your oil-based or water-based compounds based on your timeline and finish goals.

Glazing may seem like a small job, but when done correctly, it has a significant impact. So grab that putty knife and bring your windows back to life—or consult a professional for a long-lasting, clean result.

How to Get the Perfect Window Glazing? was last modified: July 22nd, 2025 by Ramona Sinha

Written by Ramona Sinha. January 20, 2020

Ramona is the Senior Content Writer for Kukun. This experienced blogger uses simple and succinct words to decipher the complex phenomenon called life. She has written articles covering a broad range of topics, such as real estate, lending and mortgage, finance, business, taxation, home designs, home improvement projects, decor concepts, and more. An avid traveler, she’s a digital nomad at heart and an animal lover from the depth of her soul.

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January 20, 2020 Log in to Reply
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