August 4, 2025 by WindowRama

Why More Homeowners Are Choosing Composite Windows: Spotlight on Kolbe’s Forgent Series

If you’re exploring window replacement options, you’ve probably come across vinyl, wood, aluminum—and maybe even fiberglass. But there’s another category that’s quietly becoming a favorite among savvy homeowners: composite windows. And one standout in this category is Kolbe’s Forgent® Series.

Let’s break down what makes composite windows, especially Kolbe’s Forgent Series, such a smart and stylish investment for your home.

What Are Composite Windows Anyway?

Composite windows are made by combining multiple materials—typically fiberglass and polymers—to create a strong, long-lasting frame. Kolbe’s Forgent windows use a proprietary material called Glastra®, which blends fiberglass and a UV-stable polymer to deliver excellent strength, durability, and performance.

Kolbe’s Forgent Series offers two different choices for the interior of the window in either a full fiberglass or a wood interior providing additional customization options to strike a balance of look and performance.

Benefits of Composite Windows

High energy efficiency, durability, eco-friendly, and exceptional customization are all benefits of choosing a composite window. They can also mimic the appearance of natural wood without the risk of warping or weather damage that wood is more susceptible to while requiring lower maintenance. 

For installers, the Kolbe Forgent Series of windows prioritizes ease of installation with a screw through frame, an integral nailing fin, and installation clips that allow for fast and easy window installs. 

Energy Efficiency That Works All Year Long

If you’re looking to lower your energy bills, this is where composite windows shine. Kolbe’s Forgent Series is designed to provide superior thermal insulation, helping to keep warm air in during the winter and out during the summer. The Glastra® material has low thermal conductivity, meaning it doesn’t easily transfer heat or cold. When paired with energy-efficient glass options, these windows can significantly reduce drafts and hot spots, making your home more comfortable and energy-efficient year-round.

Kolbe Forgent Series also utilizes a proprietary technology called AccuForge™ which involves a nip welding process that creates a tighter seal preventing moisture and unwanted air flow to leak through the windows. When you install windows with AccuForge™ you are guaranteed to have a longer lasting and more energy efficient window installation.

Built to Last – Even in Harsh Weather

Kolbe’s Forgent windows are ideal for the Northeast climate, where weather can be unpredictable. The composite material resists expansion, warping, or cracking caused by temperature swings, humidity, and direct sunlight. Unlike wood, it won’t rot or require frequent repainting. And unlike vinyl, it’s far more stable and durable over time. Testing from Kolbe shows that the Glastra® construction can hold up to 400 pounds of pressure. More than twice the amount of traditional fiberglass construction and over 100 pounds more than composite material. Kolbe’s Forgent series casement windows, for example, are able to achieve IPD4 impact certification without any additional reinforcement. That means less maintenance for you—and a longer lifespan for your investment.

A More Sustainable Window Choice

If you’re looking to make environmentally friendly choices for your home, Forgent windows check that box, too. Composite materials like Glastra® are engineered for longevity, which means fewer replacements over time and less waste headed to landfills. Plus, the energy efficiency of these windows reduces your home’s energy consumption, lowering your carbon footprint over the life of the window.

Design Flexibility for Modern and Classic Homes

One of the best things about Kolbe’s Forgent Series? It doesn’t force you to sacrifice style for performance. These windows are available in a range of interior and exterior finishes—including bold, modern hues and warm, woodgrain options. Whether you’re remodeling a historic home or designing a sleek new build, there’s a Forgent option to match.

Forgent also offers multiple configurations—casement, double-hung, awning, sliders, picture windows, and more—making it easy to create a cohesive look across your entire home.

Is the Forgent Series Right for You? If you want windows that:

-lmprove energy efficiency
-Require minimal upkeep
-Stand up to harsh weather
-Offer custom design options
-Support sustainability goals

… then Kolbe’s Forgent Series is absolutely worth a look. At WindowRama, we help homeowners across the NY-NJ-CT region explore high-performance replacement window options like the Forgent Series every day. Stop by a showroom or contact us for a consultation—we’ll walk you through your options and help you find the perfect fit for your home and lifestyle.