BlackBerry's choice for quality fiberglass windows

A History of Excellence in Kalamazoo, Grand Rapids, Battle Creek and West Michigan

Kolbe Windows & Doors has been committed to superior quality, custom craftsmanship and design excellence for over 70 years. Kolbe’s one-of-a-kind windows and doors are proudly made in the USA and can be found in some of the most impressive homes and businesses across North America. Kolbe leads the industry with innovative products that push the boundaries and defy the limits of function, performance and style.


Kolbe’s Forgent® Series

Designed for strength, performance, and ease of installation, Forgent Series windows and doors feature innovation and thoughtful design, making them simple, convenient, and easy to install. Short lead times for projects requiring windows and doors quickly make the Forgent Series a perfect choice for new construction and replacement projects.

Glastra® Fiberglass Window Material

Forgent Series windows and doors are comprised of Glastra® – a proprietary hybrid of fiberglass and UV-stable polymer, formulated for strength and resilience. An advanced ladder design adds strength while promoting long-term durability and energy efficiency for comfortable homes. An integral nailing fin and welded sash and frame provide rigidity – keeping units square, and preventing air and water from entering the joint.


Kolbe Means...


Kolbe Windows & Doors offers an array of window and door collections, along with nearly limitless custom options, that provide architects and homeowners the freedom to create and execute truly unique designs.


Kolbe Means...


Kolbe’s commitment to producing quality windows and doors began more than 75 years ago. Every Kolbe window and door is truly built to order. If you can dream it, Kolbe can build it.


Kolbe Means...


You can’t find Kolbe windows and doors in the aisles of a home center. As a qualified Kolbe dealer, we are as passionate about windows and doors as you are about bringing unique visions to life.

Other Replacement Window Material Options