Cardinal Glass Industries

What Cardinal Glass Industries does

Cardinal Glass Industries is a privately held, management-owned S-Corporation founded in 1962 in St. Louis Park, Minnesota and headquartered in Eden Prairie, Minnesota. It is a U.S. B2B manufacturer of residential glass products, serving window and door OEMs across 49 U.S. locations with approximately 10,000 employees. The company is structured around five wholly-owned subsidiaries — Cardinal FG (float and high-volume tempered glass), Cardinal CT (custom tempered glass), Cardinal LG (laminated glass), Cardinal CG (coated glass), and Cardinal IG (insulating glass) — each focused on a distinct glass product family.

The company's core technology stack centers on proprietary LoĒ low-emissivity coatings (with variants including LoĒ-180, LoĒ²-272/270, LoĒ³-366, LoĒ³-340+, Quad LoĒ-452+, and LoĒ-i89), float glass production (1.6M tons/year capacity across seven facilities), coated glass (1B ft²/year), and insulating glass unit assembly (25M units/year). Supporting technology includes the Intelligent Quality (IQ) automated inspection program, the Endur IG warm-edge spacer system (industry's lowest failure rate with a 20-year warranty), the Neat+ photocatalytic coating, and the 2023-launched CLiC switchable privacy glass. Three R&D centers in Minnesota, Wisconsin, and Florida drive coating innovation, and a partnership with Italy's K2-CO2 (announced 2025, installation beginning Q1 2028) will deploy carbon capture technology targeting up to 95% process CO2 capture on float lines.

Cardinal's business model is direct B2B sales of glass products to residential window and door OEMs, with no public pricing and no consumer or retail channel. Revenue is generated through hardware sales of float, coated, insulating, laminated, and tempered glass; pricing is negotiated per order based on specifications, volume, and multi-year supply arrangements. The company reaches OEMs via a 49-location direct sales and technical support network. No parent company exists, ownership is concentrated among management, and Cardinal has explicitly adopted remaining privately owned as a guiding principle.

Name

Cardinal Glass Industries

Legal name

Cardinal Glass Industries, Inc.

Website

https://cardinalcorp.com

Company type

Private

Founded year

1962

Operating status

Operating

Headcount range

5,001–10,000 employees

Short description

Cardinal Glass Industries is a privately held U.S. B2B manufacturer of residential glass products, supplying float, coated, insulating, laminated, and tempered glass to window and door OEMs across 49 U.S. locations, founded in 1962 and headquartered in Eden Prairie, Minnesota.

Ownership category

akta.pro rank

Headquarters

HQ city

Eden Prairie

HQ country

United States

HQ region

North America

Offices6 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Infrastructure, Personnel, Technology or R&D, Others

Revenue model

1. Glass Product Manufacturing: Cardinal generates revenue through the manufacture and sale of glass products to window and door OEMs. The company produces float glass, coated glass, insulating glass units, laminated glass, and tempered glass as finished or semi-finished products for integration into residential windows and doors. Revenue is generated through direct B2B sales with pricing based on product specifications, volume, and configuration requirements.
2. Wholly-Owned Subsidiaries: Five distinct subsidiaries handle different product lines: Cardinal FG Company (Float and High-Volume Tempered Glass), Cardinal CT Company (Custom Tempered Glass), Cardinal LG Company (Laminated Glass), Cardinal CG Company (Coated Glass), and Cardinal IG Company (Insulating Glass). Each subsidiary serves specific manufacturing and sales functions within the value chain.

Pricing tiers

Go-to-market motion2 records

Distribution channels1 record

Marketing channels4 records

Core offering

Cardinal Glass Industries manufactures residential glass products—including float glass, low-emissivity coated glass, insulating glass units, laminated glass, and tempered glass—and sells them directly to window and door original equipment manufacturers (OEMs) across the United States. The company operates five wholly-owned subsidiaries (Cardinal FG, CT, LG, CG, and IG Companies) covering distinct stages of glass production and processing. Products are integrated by OEM customers into finished residential windows and doors for new construction and replacement applications.

Product overview

Cardinal Glass Industries operates as a multi-product glass manufacturing company with five wholly-owned subsidiaries: Cardinal FG Company (float and high-volume tempered glass), Cardinal CT Company (custom tempered glass), Cardinal LG Company (laminated glass), Cardinal CG Company (coated glass), and Cardinal IG Company (insulating glass). The product portfolio centers on residential window and door glass applications, with core offerings including insulating glass units (Endur IG, XL Edge IG, Preserve Film), advanced low-emissivity coated glasses (LoĒ-180, LoĒ²-272/270, LoĒ³-366, LoĒ³-340+, Quad LoĒ-452+, LoĒ-i89, Neat+, Divert), laminated glass solutions (safety, security, sound dampening, hurricane protection, fade protection, decorative), tempered glass products, and float glass substrates (Float Glass, PureVision, HydroClear). The company also offers the LoĒasy Energy + Comfort Calculator application for consumers and professionals. Products are manufactured across 49 U.S. locations serving window manufacturers, with annual production capacity of approximately 1 billion ft² of coated glass and 25 million IG units per year.

Differentiator

Problem solved

Functional benefit

Brands

• LoE: Energy-efficient low-emissivity coated glass products including LoE-180, LoE squared, and LoE cubed variants
• Endur
• Preserve
• XL Edge
• CLiC
• Neat+
• HydroClear
• Purevision
• Divert
• Quad LoE-452+
• LoE cubed-340+

Products and services

• Endur IG Premium warm-edge insulating glass spacer system with industry-leading longevity, the lowest reported failure rate in the industry, and a comprehensive 20-year factory warranty, produced by Cardinal IG Company for residential window and door OEMs.
• XL Edge IG Durable warm-edge insulating glass spacer system launched in 1993, providing long-lasting thermal performance for residential window and door OEMs.
• Preserve Film Protective film applied to insulating glass to protect glass surfaces from damage during construction and handling, sold to window and door OEMs.
• CLiC Switchable Privacy Glass Switchable privacy glass technology that allows users to toggle between transparent and opaque states on demand, providing dynamic privacy solutions for residential windows and doors.
• Quad LoE-452+ Coated Glass Four-layer low-emissivity coated glass providing advanced solar control and year-round thermal performance, produced by Cardinal CG Company for residential window and door OEMs.
• LoE-180 Coated Glass High solar gain low-emissivity glass with the highest light transmission and lowest U-factor of any passive solar glazing, designed for high solar gain residential applications.
• LoE²-272 / LoE²-270 Coated Glass Dual-silver low-emissivity coated glass with moderate solar control for balanced energy performance across seasons, produced by Cardinal CG Company for residential window and door OEMs.
• LoE³-366 Coated Glass Triple-silver low-emissivity coated glass offering low U-factor, low solar heat gain, and high light transmission for ultimate solar control in residential windows.
• LoE³-340+ Coated Glass Enhanced triple-silver glare control coated glass providing 0.18 SHGC and superior solar control with a more neutral appearance and standard Neat+ coating, built for the hottest climates.
• LoE-i89 Coated Glass Room-side fourth surface coated glass providing maximum U-factor efficiency, with more light transmittance and less reflectance than prior LoE-i81 products.
• Neat+ Coated Glass Naturally cleaner glass using a photoactive coating that is 25% more active than regular Neat, breaking down organic dirt using sunlight for easier maintenance in residential windows.
• Divert Bird-Friendly Glass Bird-friendly coated glass with UV-reflective patterns visible to birds but transparent to humans, designed to reduce bird collisions on residential windows.
• Laminated Safety Glass Laminated glass products produced by Cardinal LG Company for safety applications, keeping glass intact and preventing injury when shattered in residential and light commercial settings.
• Laminated Security Glass Laminated glass providing protection against forced entry through enhanced impact resistance and intrusion deterrence for residential and commercial doors and windows.
• Laminated Sound Dampening Glass Laminated glass with acoustic interlayer technology that reduces noise transmission for improved interior comfort in residential and commercial windows.
• Laminated Hurricane Protection Glass Laminated glass engineered to resist storm impact and withstand hurricane-force conditions in coastal residential and light commercial applications.
• Custom Tempered Glass Versatile safety glazing processed through heat treatment for enhanced strength and safety characteristics, produced by Cardinal CT Company for residential window and door OEMs.
• Float Glass Superior flat glass produced using the float process across seven U.S. facilities, serving as the foundation substrate for all subsequent Cardinal glass processing. Annual capacity approximately 1.6 million tons.
• PureVision Glass Optimized float glass specifically designed for interior applications with enhanced optical clarity for residential and commercial interior use.
• HydroClear Glass Anti-corrosive float glass providing protection against corrosion in harsh environments, covered by a Limited Lifetime Warranty when registered within 30 days of installation.

Quantifiable outcome

• Up to 95% CO2 capture rate from float glass production through K2-CO2 partnership
• +2 more outcomes

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• K2-CO₂flagshipStrategic or Co-development Partner · 1 January 2025Cardinal Glass Industries has formed a pioneering partnership with K2-CO₂, a global leader in CO2 capture systems based in Padova, Italy, to integrate large-scale CO2 capture technology into float glass operations. The partnership has completed years of joint research, engineering studies, and technology evaluation focused specifically on float glass furnaces. K2-CO₂ has designed and engineered systems tailored for Cardinal's float glass production profile and high-volume operations. The technology is designed to capture up to 95% of CO2 in targeted process streams, addressing both energy-related emissions and CO2 released from decomposition of raw materials. Installation is scheduled to begin Q1 2028.

Scale indicators8 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Vitro S.A.B. de C.V. Mexico-based global glass manufacturer with major U.S. flat glass and coated glass operations. Directly competes with Cardinal in North American residential and architectural coated glass, with overlapping low-E product portfolios and OEM customer base.
• Guardian Glass: Koch Industries subsidiary producing float, coated, and insulating glass for residential and architectural markets in North America. Direct competitor to Cardinal in low-E coatings and IG units supplied to window and door OEMs.

Broad incumbents

• Saint-Gobain (SageGlass / Glass Solutions): Global building materials giant with extensive glass manufacturing operations including float, coated, and laminated glass in North America. Competes with Cardinal in residential glass and also operates SageGlass electrochromic glass, an adjacent offering to CLiC.
• NSG Group (Pilkington): Japan-headquartered global glass manufacturer producing float and value-added glass under the Pilkington brand, with significant North American capacity. Competes with Cardinal in residential and architectural coated glass markets.
• AGC Inc. (Asahi Glass): Global glass and chemicals company. Cardinal acquired AGC North America in 2021; AGC retains worldwide float and coated glass operations that compete with Cardinal in international and select U.S. segments.

Emerging players

• View, Inc. U.S.-based smart glass company producing electrochromic dynamic glass for commercial buildings. Emerging player in switchable/privacy glass adjacent to Cardinal's CLiC product line, though primarily targeting commercial rather than residential.
• Gentex Corporation: Manufacturer of auto-dimming mirrors and smart glass technologies, primarily for automotive but increasingly buildings. Adjacent technology player in switchable glass space competing with Cardinal's CLiC privacy offering.

Others

• Corning Incorporated: Specialty glass and ceramics manufacturer known for Gorilla Glass and LCD glass. Not a direct competitor in residential window glass, but a major U.S. glass manufacturer with overlapping industrial materials capabilities and R&D scale.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat7 records

Key risks5 records

Key highlights7 records

Customer concentration

• Xtwitter.com/cardinalglass
• Facebookfacebook.com/CardinalGlassIndustries
• LinkedInlinkedin.com/company/cardinal-glass-industries

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries5 records

Funding overview

Funding rounds

Investors

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 Cardinal Glass Industries