Kolbe’s dedication to innovation, quality and product design has led to the Forgent™ Series. This high-performance product line features proprietary material and thoughtful design, making it simple, convenient and easy to install. Short lead times for projects requiring windows quickly make the Forgent Series a perfect choice for new construction or replacement.

Elevating Strength. Forgent windows are comprised of Glastra®, a proprietary hybrid of fiberglass and UV stable polymer, formulated for strength and resilience.

Elevating Jobsite Efficiency. Forgent windows are simple to install into any project using one of three installation methods offered: integral nailing fin, installation clips, or screw through frame.

Elevating Success. Forgent windows lead to successful projects. These energy-efficient, durable windows reduce call-backs and provide comfortable homes.

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strength and resilience

Forgent windows are constructed of Glastra™, a proprietary material formulated for strength and resilience. This unique material is a hybrid of fiberglass and a UV stable polymer. Forgent windows are engineered with Glastra on the exterior, with either wood or Glastra on the interior.



Fiberglass-infused, innovative material formulated for strength and resilience.


Fused joint keeps unit square and prevents air and water from entering the joint


Carefully designed chambers eliminate additional reinforcements and improve energy efficiency.


Designed for fewer sealing points and can be used as the primary installation method.

Window Experts

You can’t find Kolbe windows and doors in the aisles of a home center. At Horner Millwork we are passionate about windows and have the expertise to bring your vision to life. Leave the details in the hands of our Kolbe window specialists. We’ll work with you to make your vision a concrete reality.

Kolbe Catalogs

brochure_thumb_kolbeforgentKolbe Windows
Forgent Series
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Kolbe Windows
We’re for the Visionaries
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Kolbe Windows
Inspiration Portfolio
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brochure_thumb_kobeultraKolbe Windows
Ultra Series
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Kolbe Vistaluxe
Contemporary Windows
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brochure_thumb_kobeheritageKolbe Windows
Heritage Series
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Kolbe Windows
Commercial Capabilities
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