Now Offering Kolbe Forgent® Series Fiberglass Windows

We are excited to announce that we are expanding our window replacement options and are now offering Kolbe Forgent® Series fiberglass windows to our customers. As a renowned window and door manufacturer, Kolbe is dedicated to innovation and high-quality product design, making them a natural fit for Bak Brothers. 

Read on to learn more about this exciting new product to help you decide if they’re the right window replacement option for your home.

What Sets Kolbe Forgent® Series Windows Apart?

Kolbe Forgent® Series windows are made with a proprietary material called Glastra, a hybrid of fiberglass and UV-stable polymer. This unique material is specifically designed with strength and resiliency in mind, offering better overall performance than other window materials. 

Forgent® Series windows also have a welded sash and frame, which prevents air and water from coming into the joint. Perhaps best of all, the window’s unique ladder chambers are designed for maximum energy efficiency, making your monthly electricity bills more predictable. 

Beyond that, Kolbe Forgent® Series windows are easy to install, so we can turn around your window replacement project quicker than ever before. 

What Options Are Available?

Kolbe Forgent® Series windows are available in two different interior material options to better match your home’s decor. 


With this option, the interior and exterior of the window are made with durable Glastra. It comes in the following finishes: Bronze, Cloud, Midnight, and Sahara.


If you prefer the look of wood for your windows, the Glastra/Wood material combination is for you. In this design, the exterior of the windows is made from Glastra, while the interior is made from pine wood. It is available in the following finishes: Black Paint, Double Clear Coat, Latex Primer, White Paint, or a variety of different stains. 

Benefits of Kolbe Forgent® Series Windows

Why should you consider installing Kolbe Forgent® Series windows in your home? Here are some of the reasons we love them. 

  • The Glastra exterior is strong and resilient, so you don’t have to worry about security or energy efficiency issues. 
  • They’re optimized for energy efficiency, so our temperamental Illinois climate won’t affect your home’s interior temperature.
  • They have an advanced ladder design making them stronger than other comparable windows. 
  • The welded sash and frame prevent air and water from coming into your home.
  • They’re a sustainable choice as Glastra is a recyclable material. 
  • They come in a variety of finishes so you can choose an option that fits in with the rest of your home’s design.

Request a Free Quote on Kolbe Forgent® Series Windows

Replacing the windows around your home can instantly boost your curb appeal, increase your home value, and improve your energy efficiency. So, why wait any longer to update your home? Contact the Bak Brothers team today to learn more about Kolbe Forgent® Series windows and to request a free quote for your window replacement project.