Are Glass Block Windows Energy Efficient?

Making your home more energy efficient is not only good for the planet, it’s good for your wallet. Whether you’re installing replacement windows or choosing windows for a home that’s yet to be built, glass block windows are a solid, energy efficient choice.


With energy efficiency and thermal transmittance values similar to double pane windows, windows made with glass block are not only energy efficient but they’re beautiful. Glass block windows effectively eliminate the need for storm windows and reduce the energy required to heat and cool your home.


In many cases, with the increased light transmission these windows provide, you may find you don’t have to switch on overhead lights or lamps as often. 

Where to Install Glass Block Windows

You can install glass block windows anywhere you might install a standard window. Some of the more common locations include:


  • Basement
  • Bathroom
  • Kitchen
  • Laundry Room
  • Front Entryway (Door sidelights and transom)


Anywhere that you want to add privacy and increase natural light is a good location. 


Your Glass Block Window Options

We prefabricate a number of options to suit your budget and taste, in a number of standard and custom sizes. All of our windows are made with Seves Glass Block Inc. materials. Preassembled glass block window options include:

Vinyl Wrapped Quick Mount Windows

Our vinyl wrapped quick mount windows are the easiest and quickest to install. They are manufactured with a fully assembled welded vinyl frame.  These frames have both an interior and exterior soft seal, interior glaze, and full water weep system for maximum performance. For added energy efficiency, check out the specifications for the Energy Saving line.

European 19 Clear and Color Windows

Prefabricated using the Basic Line glass block in the wavy pattern, the European 19 windows add a touch of elegance to any room. Available with and without vents. 

Custom Made Glass Block Windows

For unusual sizes and custom applications, we can prefabricate windows for you using your builder’s specifications. Any custom job will require additional time.

Specialty Windows

There are also specialty glass block windows that you would buy more for their tornado-resistant and hurricane-resistant qualities, but these glass block windows are energy efficient as well, due to the same reasons outlined above. 


If you live in a tornado prone area, or anywhere that hurricanes have made landfall, you may want to consider replacing at least some of your existing windows, or using these windows in a new build. In some locations of Florida, local building codes require impact resistant window systems

How to Install Glass Block Windows

You will get full instructions on how to install your new windows when you receive them. If you’re handy, it can be a DIY project. Be sure to have two people on the job, as the windows can be quite heavy.


We’ve gone over some of the basics in a couple of recent blogs, including:

How to Install Glass Block Windows Like a Pro

How to Install a Glass Block Window into a Wood Frame in 8 Simple Steps


Rest assured, we will not leave you hanging. We work with our customers from taking the initial measurements to the finished project. 


Here’s what one of our satisfied customers had to say:

Toni did a great job working with me to ease my worries about installing these beautiful glass block windows in my house.  She took the time to not only go over how to measure the windows, but to install them as well.  Toni worked with me through the entire process.  Thank you to Toni and Quality Glass Block for making my old dreary bathroom into a bathroom that I love to walk in to! 


Order Your Glass Block Windows Today

If you’re interested in replacing some existing windows with glass block windows, or you’re building a new home, we can help. We work directly with homeowners as well as home builders. Have your specifications ready when you go to place an order to ensure you get exactly the products you need.


If you have any questions or need some guidance, our team is here to help. Just give us a call at (815) 416-1007.