What is Window Glazing and Why Is It Important?

February 28, 2022



Window Glazing - Clera Windows + Doors

When it comes to increasing energy-efficiency in the home, “window glazing” is important to consider. However, this term can mean two different things. The process of fitting new window glass may come to mind, which is usually done with a special putty called a “glazing compound.” However, this is not the only definition of window glazing.  

Window glazing is also an attribute of windows, pertaining to the kind of glass they have. In this guide, we will talk about the two definitions of window glazing and why it’s important to understand both of these if you want to have added energy efficiency and better insulation.  

Let’s get started!

Window Glazing And Why Is It Important - Clera Windows + Doors

What is Glazing on a Window?

Before we get into the nitty-gritty of window glazing, let’s lay out all the connected definitions when it comes to this term:

  1. As a verb, “to glaze” is to install glass into a window, wall, or door. Meanwhile, “to reglaze” is to replace glass.  
  2. The word “glazing” or “window glazing” is a term used to describe the glass itself that is incorporated into a window frame or wall. In extension, “-glazed” is used to describe how many panes of glass a window has. Consider the following examples:
  3. A window with only one pane (layer) of glass = single-glazed
  4. A window with two panes (layers) of glass = double-glazed
  5. A window with three panes (layers) of glass = triple-glazed

Both definitions of window glazing are related to increasing energy efficiency. On one hand, reglazing old windows can help stop leaks – especially when the glass is already warped or cracked. While leaks are present, windows of any kind cannot be energy efficient. On the other hand, when shopping for an entirely brand new window, being mindful of window glazing options (i.e. number of layers of glass) will have a bearing on the home’s energy efficiency. As a general rule, the more glass layers a window has, the more insulation and energy efficiency it can provide.  In the next sections, we’ll talk about how to do window glazing or reglaze a window.

What Is Glazing On A Window - Clera Windows + Doors

Reglazing a Window

1. Reglazing Single-Pane WIndows

For various reasons, your single-pane windows might need to be reglazed. If you notice the glass has been cracked or is warped, this is a sure sign that reglazing needs to be done immediately. Some homeowners take a DIY approach to this. Depending on what work needs to be performed; you will probably want to hire a professional glazier to do the job for you. Many older homes have windows that simply cannot be replaced. Homeowners will often want to preserve the character and style of the era, which can pose an issue when the glass itself needs to be reglazed. You can either have someone come to your home to do the job, or you can send your windows into a firm that specializes in reglazing services.

The other option is to opt for windows with multiple panes of glass – which will help you save even more energy. We will discuss this further in a later section.

2. Reglazing Double-Pane Windows (And Other Multi-Pane Windows)

Just because double-glazed windows have more complex glass units doesn’t mean they can’t be reglazed. The same can be said for triple-pane and quadruple-pane windows. Typically, the glass units of these windows need to be replaced in the following cases:

  • The glass is broken, cracked, or warped
  • The seal is broken, leading to condensation in between the panes of glass.

Reglazing multi-pane windows will almost always need to be done by a professional.

Reglazing Double-pane Windows - Clera Windows + Doors

Window Glazing Options With Replacement Windows

Window glazing options encompass single-glazed windows, double-glazed windows, triple-glazed windows, and so on. Nowadays, it is common for homes in Canada to be equipped with double-pane windows. For glass with two or more panes, they are collectively called multi-pane windows. These windows have two or more layers of glass that are sealed on a platform. Typically, Krypton, Argon, or air is sealed between the glass layers to provide added insulation.  

The kind of window glazing that you choose for your next replacement windows will impact the following:

  • Insulation & energy-efficiency
  • Noise-reduction
  • Security
  • Adherence to the law (in some regions)

1. Insulation and Energy Efficiency

The more layers of glass your windows have, the more insulation and energy efficiency you can expect. However, the cost also rises depending on the number of layers of glass. For many homeowners, it’s a matter of finding which window glazing option is the best investment for their individual situation. Furthermore, the frame design, quality of weatherstripping, and the quality of installation will also influence how much insulation and energy efficiency a window provides.

2. Noise Reduction

More layers of glass also mean that more outside noise is reduced. Sound waves tend to have a harder time penetrating through multi-pane windows. This is another factor to consider when choosing among different window glazing options.

3. Security

The same idea applies in that more layers of glass also equates to more security because multi-pane windows are harder to break through. In addition, the quality of the window’s hardware also plays a part in enhancing home security.  

4. Adherence to the Law

In some provinces like Ontario, new homes are required to install at least a double-glazed window.

High-Quality Windows & Reliable Window Professionals

This wraps up our article on window glazing and why it’s important to be completely familiar with this concept. Whether you’re looking to reglaze your old windows or shop for new replacement windows, we’re here to help. Clera Windows + Doors is one of the most trusted window manufacturers in Canada. We manufacture windows that have it all: energy efficiency, durability, and style. For other window needs, you can also contact our window professionals. Contact us today to schedule your FREE in-home consultation!

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