What Is Window Glazing? Answered In Window Buyer's Guide

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What is Window Glazing? 2026 Window Buyer's Guide Open Download FREE Guide for Offline Viewing

• Section 1: When Should I Replace My Windows? Toggle nested menu
  • Is it Time to Replace Your Windows?
  • Replacing Builder Grade Windows
• Section 2: What Are the Types of Windows and Which is Best For Me? Toggle nested menu
  • Window Type Basics
  • What are Single-Hung Windows?
  • What are Double-Hung Windows?
  • What are Casement and Awning Windows?
  • What are Bay and Bow Windows?
  • What are Garden Windows?
  • What are Picture Windows?
  • What are Storm Windows?
  • What are Custom and Shaped Windows?
  • What are Basement Hopper Windows?
  • What are Sliding Windows?
  • What are Impact Windows?
• Section 3: What Do I Need to Understand About the Anatomy of a Window? Toggle nested menu
  • What Parts Make up a Window?
  • What Is Window Glazing?
  • Types of Window Glass: A Glossary of Glass
• Section 4: What Do I Need to Know About Energy Performance and Energy Efficiency? Toggle nested menu
  • Windows and Energy: A Glossary of Terms
  • How Energy-Efficient Windows Help You Save Money
• Section 5: What Are the Material Choices for My Windows? Toggle nested menu
  • Your Windows, Your Way
  • What Kind of Window Frame is Right for You?
  • Color Options for Vinyl Window Frames
  • 6 Things to Know About Window Locks
• Section 6: How Can I Choose the Best Replacement Window Company? Toggle nested menu
  • 5 Questions to Ask When Choosing a Window Replacement Company
  • How to Spot A Deal That's Too Good to Be True
  • How Much do Replacement Windows Cost?
• Section 7: What Should I Expect From the Window Buying and Installation Process? Toggle nested menu
  • Shopping for Replacement Windows? Here's What to Expect
  • What to Expect During Your Window Installation
• Appendix Toggle nested menu
  • Window Buyers' Guide Checklist
  • Window Care Guide | Everything You Need to Take Care of Your Champion Windows
  • What Is Argon Gas? How Is It Used in Windows?
  • What Is Low-E Glass? How Does It Improve Energy Efficiency?
  • Window Energy Performance Ratings | Your Primer for Window Shopping
  • Energy Efficient Windows | Everything You Need to Know in One Place
  • What Is U-Factor? | Understanding Energy Efficiency for Windows
  • What Is Window Glazing? Why Is It Important for Energy Efficiency?
  • Vinyl vs Wood Windows | Which Is the Better Choice for You?
  • Vinyl Windows | Comparing Wood Colors & Wood Grains
  • What Are Casement Windows? Are They Right for Your Home?
  • What Are Double-Hung Windows? Review the Pros and Cons
  • What Is a Bow Window? What Are the Pros and Cons?
  • Double-Hung vs Single-Hung Windows | Everything You Need to Choose
  • Tilt Turn Windows | The What, Why, and How
  • What Is a Window Sash? How to Inspect It? Perform Proper Maintenance
  • What Is a Window Sill? It Isn't What You Think
  • Windows Types and Styles | Compare Pros and Cons of Each
  • Home Window Basics | A Simple Guide
  • Types of Window Glass | Comparing All Types and Finding What's Right
  • What Is Window Cladding? What the Different Types and Advantages?
  • Making the Most of Your Garden Window
  • Window Locks & Window Lock Types | A Simple Guide
  • Energy Star 7.0 Requirements

1. 2026 Window Buyer's Guide
2. Section 3: What Do I Need to Understand About the Anatomy of a Window?
3. What Is Window Glazing?

Expert Overview

1. Window glazing is the glass inside of a window, which can be single, double, or triple glaze (also known as single pane, double pane, or triple pane).
2. Window glazing can also refer to the putty that holds the glass in place, or the process of installing the window glaze using the putty.
3. The more panes of glass you have, the better insulated your window is. Double glaze, or double paned windows, are the most common types of windows.

You might hear the term window glazing when reading about windows or talking to a replacement window company. Window glazing essentially means window glass.

However, it can also refer to window glazing compound, which is the putty that holds the glass in place, inside the window. And just to make things even more interesting, glazing can also refer to the process of installing the window glazing compound.

In one sense, window glazing and window glass are interchangeable terms. Except . . . there are multiple types of window glass. What separates these types of glass is the way they are manufactured (how they are heated and cooled). It gets slightly confusing, because when we talk about types of manufactured glass, such as tempered glass or laminated glass, we usually just refer to it as glass, not glazing.

Glazing is the broader term that refers to a pane of glass, but not usually the specific type of manufactured glass.

Window glazing basics

A single glaze (also called single pane) window refers to a window with a single sheet of glass. These are the least energy efficient windows. You might find them in older homes, but you wouldn’t want single pane windows today.

A double glaze (also called double pane) window has two sheets of glass, with a space in the middle. Usually, these windows have argon gas in between the layers of glass. Argon gas is a way to help insulate the windows. It’s the most common type of glazing.

A triple glaze (also called triple pane) window has three sheets of glass, with argon gas in between. It’s the best insulated, most expensive, and least common type of glazing (usually only used in colder climates that need the insulation).

Learn more about window glazing, including how window glazing compound works, and why it’s important.

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