Alpen High Performance Products

What Alpen High Performance Products does

Alpen High Performance Products is a U.S.-based manufacturer of super-insulating residential and commercial windows, doors, and insulated glass units (IGUs), founded in 1986 by Robert Clarke and headquartered in Louisville, Colorado with a second manufacturing facility in Vandergrift, Pennsylvania under development. The company's core technology platform is ThinGlass — ultra-thin glass (as thin as 0.5mm) adapted from smartphone and display manufacturing, combined with proprietary Molecular Bond warm-edge spacer and altitude-adjusted gas retention technology, achieving R-values up to R-15 and U-factors as low as 0.09 in triple and quad-pane configurations. The product portfolio includes two finished window/door lines (Zenith fiberglass frames up to R-10; Tyrol fiber-reinforced uPVC frames up to R-11 with European-style tilt-turn operation), the AlpenGlass IGU line sold to other window manufacturers, and the WinSert secondary glazing retrofit system. Alpen was the first North American window manufacturer to achieve dual PHIUS and PHI Passive House certification and the first North American window certified under the Living Building Challenge Declare label.

The company operates a hybrid go-to-market: a nationwide U.S. dealer network handles residential projects, while direct enterprise sales engages commercial architects, general contractors, property developers, and Energy Service Companies (ESCOs) for commercial fenestration and retrofit specifications. Pricing is quote-based and project-specific with multi-year contracts, reflecting the custom-manufacturing model. Customers span residential homeowners, high-profile commercial developments (Rocky Mountain Institute Innovation Center, Mesa Verde Visitor Center, Empire State Building), government and institutional clients (City of Boulder, Boulder Valley School District), and emerging affordable-housing channels via partnerships with Flatirons Habitat for Humanity. The company maintains 51-100 employees and has raised approximately $27.8M cumulatively, including DOE grants of $11.7M (2023-2024) supporting facility retrofits intended to create over 100 additional jobs, plus a $12.1M undisclosed round in 2024 and a $4M round from Arborview Capital in 2019. Recent strategic moves include collaborations with Corning Incorporated (Enlighten Glass IGUs, November 2025) and Deceuninck North America (Elegant window contract manufacturing, December 2025), alongside continued certification leadership (ENERGY STAR Most Efficient, 2024).

Name

Alpen High Performance Products

Legal name

Alpen High Performance Products

Website

https://thinkalpen.com

Company type

Private

Founded year

1986

Operating status

Operating

Headcount range

51–100 employees

Short description

Alpen High Performance Products manufactures super-insulating residential and commercial windows, doors, and insulated glass units using proprietary ThinGlass and Molecular Bond spacer technologies, serving architects, developers, homeowners, and ESCOs across all 50 U.S. states through a nationwide dealer network and direct enterprise sales.

Ownership category

akta.pro rank

Product category

High-Performance Windows and Doors

NAICS

Glass and Glass Product Manufacturing (3272)

SIC

Glass Products, Made Of Purchased Glass (3231)

akta.pro primary industry

Windows (IMADAIAC)

akta.pro secondary industry

Low‑E, Solar Control & Energy-Efficient Coated Glass (IMADAHAF)

Keywords

• High performance windows
• Insulated glass units
• Fiberglass residential windows
• Passive house windows
• Thin glass technology

Headquarters

HQ city

Niwot

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Windows and Doors Sales: Custom-manufactured residential and commercial windows and doors sold through dealer network and direct project engagement. Products include fiberglass (Zenith series) and fiber-reinforced uPVC (Tyrol series) frames with advanced glazing. One-time hardware sales model with varying project sizes.
2. Insulated Glass Units (IGUs): AlpenGlass thin triple and quad-pane IGUs sold to other window manufacturers, glazing contractors, and architects seeking highest energy efficiency standards. Manufactured in automated production processes with DOE support.

Pricing tiers

Go-to-market motion2 records

Distribution channels4 records

Marketing channels7 records

Core offering

Alpen High Performance Products manufactures custom, super-insulating residential and commercial windows, doors, and architectural glass. The company produces two primary product lines (Zenith fiberglass and Tyrol fiber-reinforced uPVC) along with AlpenGlass thin triple and quad-pane insulated glass units and WinSert secondary glazing systems for retrofit applications, serving homeowners, architects, builders, and other window manufacturers across the U.S.

Product overview

Alpen High Performance Products is a manufacturer of high-performance windows, doors, and insulated glass units for residential and commercial applications. The portfolio includes two primary window/door product lines: Zenith (fiberglass frames with North American styling, up to R-10) and Tyrol (fiberglass-reinforced uPVC with European-style tilt-turn operation, up to R-11). Both lines feature Alpen's proprietary ThinGlass technology in triple and quad-pane configurations. Supporting products include AlpenGlass insulated glass units sold to other window manufacturers, and WinSert secondary glazing for retrofit applications. The company serves architects, builders, commercial developers, and homeowners through an expansive US dealer network.

Differentiator

Problem solved

Functional benefit

Brands

• Zenith Series: Fiberglass windows and doors with North American outswing functionality, achieving up to R-10 rating.
• Tyrol Series
• AlpenGlass
• WinSert

Products and services

• Zenith Series Windows

Quantifiable outcome

• R-values up to R-15 with thin glass technology
• +6 more outcomes

Named customers8 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

Feature5 records

Partnerships

Six partnerships are on record, tiered minor, supporting and core.

• Saint-GobainminorStrategic or Co-development Partner · 28 January 2026Both Alpen and Saint-Gobain identified as key companies actively innovating and expanding market presence in the building envelope retrofit market through acquisitions and new product launches.
• Flatirons Habitat for HumanitysupportingStrategic or Co-development Partner · 7 January 2026Alpen partnered with Flatirons Habitat for Humanity and Boulder Valley School District for the Ponderosa Community Stabilization Project. The initiative builds affordable, energy-efficient modular homes at the BoulderMOD factory for Boulder residents displaced by the 2013 flood. Alpen provides thin triple glass windows for the homes which are constructed by high school students in BVSD's APEX program.
• Boulder Valley School DistrictsupportingStrategic or Co-development Partner · 7 January 2026BVSD partnership in Project Ponderosa where high school students in the APEX high-performance building program construct affordable homes featuring Alpen windows, providing sweat-equity homeowners with affordable ownership options.
• Deceuninck North AmericacoreStrategic or Co-development Partner · 3 December 2025Deceuninck North America partnered with Alpen for production of its European-style Elegant window series. Alpen manufactures the products at its Louisville, Colorado facility. The Elegant platform offers energy-efficient windows with slim profiles, thermal performance with U-values as low as 0.09, and support for large glass expanses. The collaboration aims to accelerate commercialization of these products in the North American market as part of Deceuninck's long-term growth strategy.
• Corning IncorporatedcoreStrategic or Co-development Partner · 4 November 2025Alpen announced collaboration with Corning Incorporated to develop advanced insulated glass units using Corning's Enlighten Glass. The partnership aims to improve the efficiency, strength, and lightness of building windows in the U.S. market through combined expertise in glass technology.
• Lawrence Berkeley National LabsupportingTechnology or IntegrationAlpenGlass technology developed in collaboration with Lawrence Berkeley National Lab. Low-emissivity coatings developed with DOE and LBNL from 1977-1983 paved the way for low-e coatings on thin films and glass.

Scale indicators7 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Zola Windows: U.S. manufacturer of Passive House-certified windows and doors with European-style tilt-turn operation, directly comparable to Alpen's Tyrol and Zenith lines on thermal performance and target customer.
• Cascadia Windows & Doors: North American manufacturer of fiberglass high-performance windows for Passive House, Net Zero, and deep-energy-retrofit projects — overlapping directly with Alpen's Zenith fiberglass line and PHIUS-certified positioning.
• Intus Windows: European-style uPVC and timber-aluminum high-performance windows with triple glazing, serving the U.S. Passive House and premium retrofit market — comparable to Alpen's Tyrol tilt-turn offering.
• Serious Windows: U.S. manufacturer of energy-efficient fiberglass windows and doors targeting Passive House, LEED, and Net Zero projects, with similar specification-driven GTM and architectural channel focus.

Emerging players

• Passive House Supply: Specialist distributor and assembler of Passive House-certified windows and components in North America — overlaps with Alpen on the PHIUS-certified product category but operates primarily as a channel partner rather than manufacturer.

Broad incumbents

• Marvin Windows and Doors: Large established U.S. premium window and door manufacturer with a wide product range including high-performance lines (e.g., Elevate) — competes with Alpen in the premium commercial and custom residential segments with greater scale and dealer reach.
• Pella Corporation: Major U.S. window and door manufacturer with broad product portfolio across price tiers; overlaps with Alpen on energy-efficient and commercial fenestration but competes primarily on volume and dealer breadth.
• Andersen Corporation: Largest U.S. window and door manufacturer with multiple brands (Andersen, Renewal by Andersen, MQ) — provides broad competitive pressure across residential and commercial fenestration, including high-performance composite and Fibrex lines.
• Cardinal Glass Industries: Major U.S. manufacturer of insulated glass units and advanced glazing components — directly comparable to AlpenGlass on IGU products sold to window manufacturers and glazing contractors.
• Saint-Gobain: Global building products and architectural glass giant (including SageGlass, Vetrotech, and CertainTeed) — explicitly identified alongside Alpen as a key player in the building envelope retrofit market and a potential competitor across glazing and high-performance windows.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/AlpenHPP
• Facebookfacebook.com/pages/Alpen-HPP/502094566469483
• LinkedInlinkedin.com/company/alpen-high-performance-products
• Instagraminstagram.com/alpenhpp

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Funding overview

Funding rounds5 records

Investors3 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Alpen High Performance Products