About Kolbe Windows & Doors
Kolbe Windows & Doors is a Wisconsin-based manufacturer specializing in wood-interior, aluminum-clad, and all-aluminum window and door systems for custom residential and commercial projects where craftsmanship, configurability, and performance are primary requirements. Founded in Wausau, Wisconsin in 1946, Kolbe has maintained its manufacturing operations in the upper Midwest and built a reputation for producing large, architecturally complex window and door assemblies to exacting tolerances.
Kolbe's product lines span double-hung, casement, awning, fixed, sliding, and specialty-shaped windows; folding, sliding, and swinging door systems; and curtain wall and storefront assemblies for light commercial applications. The company is particularly recognized for its ability to produce large-format and non-standard shapes — arched, round, trapezoid, and multi-unit assemblies — that require manufacturing flexibility beyond standard production-line capabilities. Wood-interior clad windows remain the core of the Kolbe residential specification.
Kolbe markets through a dealer and distributor network and maintains strong relationships with residential architects and custom builders nationally. For specifiers, Kolbe is most relevant when a project requires large sizes, complex configurations, wood-interior details, or aluminum-clad durability combined with architectural-grade performance ratings.
Company Snapshot
Product Lines
Kolbe Ultra Series (Wood-Interior Clad)
Premium aluminum-clad, wood-interior windows and doors for custom residential and architect-specified commercial projects.
- Aluminum exterior cladding with wood interior
- Casement, double-hung, awning, fixed, and specialty shapes
- Large sizes and non-standard configurations
- Custom color and finish options
Forgent Series (All-Aluminum)
All-aluminum windows and door systems for contemporary residential and commercial projects requiring slim profiles and aluminum durability.
- Thermally broken aluminum framing
- Slim sightline profiles
- Sliding, folding, and fixed configurations
- Commercial and residential applications
Folding and Sliding Door Systems
Large-format folding and multi-slide door systems for indoor-outdoor openings in wood-clad and aluminum configurations.
- Bifold door systems in wood-clad and aluminum
- Multi-slide systems
- Large panel sizes
- Integrated screen options
Common Applications
Custom Residential
Architect-specified custom homes where large sizes, complex shapes, wood interiors, and high performance ratings are required.
Light Commercial and Institutional
Low-rise commercial, educational, and institutional projects requiring aluminum-clad durability and architectural-grade performance.
Historic and Traditional Architecture
Renovation and new construction projects in traditional architectural styles where wood-interior windows and fine detailing are appropriate.
What To Know
Large and complex size capability
Kolbe's manufacturing processes accommodate oversize, non-standard, and shaped units that exceed the capabilities of most production-line manufacturers.
Wood-interior craftsmanship
Wood-interior clad products are a core competency, offering interior warmth and paintability combined with low-maintenance aluminum exteriors.
Architectural configurability
Deep options in divided lights, interior finishes, hardware, and assembly combinations support highly specific architectural fenestration programs.
Editorial profile based on Kolbe Windows & Doors public product and company materials; last reviewed April 30, 2026.