Why Glass In Windows Is A Poor Insulator

Glass is a popular choice for windows. It's transparent, which allows natural light to enter the building. However, glass windows are not a highly effective insulator.

In this blog, we will explore some of the reasons why glass in windows is such a poor insulator. We will also discuss some of the alternatives that are available for window insulation.

Why Are Glass Windows So Popular?

There are several reasons why glass windows are so popular. First, as mentioned earlier, glass is transparent. This allows natural light to enter a building, which can help to reduce energy costs.

Second, glass is a relatively inexpensive material. When compared to other materials that can be used for windows (such as wood or metal), glass is usually less expensive.

Finally, glass windows require minimal maintenance. They don't rot like wood windows, and they don't corrode like metal windows. For these reasons, glass windows are often seen as a low-maintenance option.

Picture of a sunroom with floor to ceiling windows.

Fun Fact

Winsulator secondary glazing inserts have 8x more thermal insulation than standard glass. Combine this with our magnetic dead air seal, Winsulator will reduce your home or office energy usage up to 30%

Why Is Glass Such A Poor Insulator?

One of the biggest reasons is that glass is an excellent conductor of heat. This means that it can quickly transfer heat from one side to the other. In the summer, this means that heat from the sun can enter the building, making it hotter inside. In the winter, this means that heat from inside the building can escape through the windows.

Another reason why glass is a poor insulator is that it is not very dense. This means that there are large spaces between the molecules in the glass. These spaces allow heat to move freely through the material.

What Are Some Alternatives To Glass Windows?

If you're looking for a more energy-efficient window, there are several alternatives to glass that you can choose from.

One option is to use a material that is a better insulator than glass. Materials such as fiberglass or polyurethane foam have smaller spaces between the molecules, which makes them more effective at trapping heat.

Another option is to use a window with multiple panes of glass. These windows have two or more layers of glass separated by a layer of air. The air acts as an insulator, and it can help to reduce heat transfer.

Finally, you may also want to consider using tinted windows. Tinted windows reflect some of the sunlight away from the building, which can help to keep the inside cooler.

Winsulator Offers A Better Solution (Without Having To Replace Your Current Windows)

If you're looking for an energy-efficient window at an affordable price, Winsulator offers the best solution. Winsulator magnetic panels attach to your existing windows, insulating them and making them more energy efficient. In fact, our magnetic panels, which have been tried and tested by NASA, can reduce your energy usage up to 30%!

Winsulator's magnetic panels are made of a material that is a better insulator than glass. This helps to reduce heat transfer and make your home more comfortable year-round, whether you’re in a hot or cold climate.

In addition, Winsulator's panels are tinted. This helps to reflect sunlight away from the building, keeping the inside cooler in the summer.

Finally, Winsulator's panels are easy to install and remove. They attach to the window frame with magnets, and they can be removed just as easily. This makes them a great option for renters or anyone who doesn't want to make permanent changes to their windows.


Picture of a family room surrounded by paneled windows.

Get a Free Quote

If you're interested in energy-efficient windows, get a free quote from Winsulator today. We'll help you choose the best option for your home.

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Window Replacement: A Poor Return on Investment