Cornerstone Building Brands

What Cornerstone Building Brands does

Cornerstone Building Brands is the largest North American manufacturer of exterior building products, organized into three operating segments: Siding & Accessories (Surface Solutions), Windows & Doors (Aperture Solutions), and Metal Solutions (Shelter Solutions). The company produces vinyl windows, vinyl siding, stone veneer, metal roofing, metal wall systems, and related accessories under a portfolio of 25+ sub-brands including Ply Gem, Simonton, Mastic, MBCI, Harvey, Cascade, Mueller, and Metal Sales. Manufacturing operations span 93 production facilities with 106 warehouses, distribution centers, and retail outlets across the United States and Canada, supported by approximately 19,400 team members. The company is privately held by Clayton Dubilier & Rice (CD&R) and was formed in 2018 through the merger of NCI Building Systems and Ply Gem Building Products, both prior CD&R portfolio companies.

The company generates revenue through wholesale and distribution-based hardware sales of manufactured building products to three end markets: residential new construction, residential repair and remodel, and commercial/industrial construction. Products move through four go-to-market channels (Buildings, Commercial Metal Roofing, Retail Direct, and Building Supply Distribution) reaching customers via Home Depot, lumberyards, distributors, dealers, and direct builder relationships. The company is currently managing approximately $5 billion in debt and working with creditors and their advisers (Moelis & Co. and Paul Weiss Rifkind Wharton & Garrison) on a potential restructuring, while continuing to execute an active M&A and product expansion strategy (most recently acquiring Metal Sales Manufacturing Corp. in September 2025 and launching SunSteel integrated solar roofing in January 2026).

Name

Cornerstone Building Brands

Legal name

Cornerstone Building Brands, Inc.

Website

https://cornerstonebuildingbrands.com

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

5,001–10,000 employees

Ownership category

akta.pro rank

Product category

Exterior Building Products Manufacturing

NAICS

Metal Window and Door Manufacturing (332321), Ornamental and Architectural Metal Products Manufacturing (33232), Architectural and Structural Metals Manufacturing (3323)

SIC

Metal Doors, Sash, Frames, Moldings & Trim (3442), Fabricated Structural Metal Products (3440)

akta.pro primary industry

Interior Doors (IMADAIAB)

Keywords

• Exterior building products
• Vinyl windows doors
• Metal roofing systems
• Manufactured stone veneer
• Metal building solutions

Headquarters

HQ city

Cary

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Exterior Building Products Manufacturing: Cornerstone Building Brands manufactures and sells exterior building products including vinyl windows, vinyl siding, stone veneer, metal roofing, metal wall systems, and metal accessories. Products are sold through multiple distribution channels including distributors, home centers, lumberyards, and direct to builders/contractors. Revenue is generated from product sales across residential new construction, residential repair/remodel, and commercial markets.

Go-to-market motion1 record

Distribution channels7 records

Marketing channels10 records

Core offering

Cornerstone Building Brands is the #1 manufacturer of exterior building solutions in North America, producing vinyl windows, vinyl siding, manufactured stone veneer, metal roofing, metal wall systems, and metal building systems. The company serves both residential and commercial markets through three business segments: Siding & Accessories, Windows & Doors, and Metal Solutions. Products are sold via multiple channels including home centers, distributors, lumberyards, dealers, and direct-to-builder programs across approximately 225+ facilities.

Product overview

Cornerstone Building Brands is a premier manufacturer of exterior building solutions in North America, organized into three main business segments: Siding & Accessories (Surface Solutions), Windows & Doors (Aperture Solutions), and Metal Solutions (Shelter Solutions). The company offers a comprehensive portfolio of products spanning vinyl windows, vinyl siding, stone veneer, metal roofing, metal wall systems, and metal accessories through multiple sub-brands. The Siding & Accessories division includes Mastic, Variform, Mitten, MAC Metal Architectural, StoneWorks, and Ply Gem fence/railing/gutters. The Windows & Doors division includes Simonton, American Craftsman, Silver Line, Atrium, Cascade, Harvey, North Star, Thermo-Tech, SoftLite, and Ply Gem Canada brands. The Metal Solutions division includes MBCI, ABC, Union Corrugating, Fortify Building Solutions, Mueller, Metal Sales, Star Building Systems, Metallic, Robertson, and Ceco Building Systems. The company serves both residential and commercial markets across new construction and repair & remodel channels.

Differentiator

Problem solved

Functional benefit

Brands

• Ply Gem: Vinyl siding, windows and doors, stone veneer, fence and railing products
• Simonton
• Mastic
• Variform
• Mitten
• StoneWorks
• MBCI
• CECO Building Systems
• Star Building Systems
• Metallic Building Systems
• Robertson Building Systems
• Union Corrugating Company
• American Building Components (ABC)
• American Craftsman
• Silver Line
• Atrium
• North Star
• Harvey
• Cascade Windows
• Prime Window Systems
• Thermo-Tech
• SoftLite
• Fortify Building Solutions
• Mueller
• Metal Sales
• MAC Metal Architectural
• TrueWall
• Ply Gem Canada

Products and services

• Vinyl Siding Premium vinyl siding products offered under multiple sub-brands (Mastic, Variform, Mitten, TrueWall) with broad color selection, virtually maintenance-free properties, and limited-lifetime warranties, serving builders, contractors, and homeowners across residential new construction and repair/remodel markets.
• Manufactured Stone Veneer Manufactured stone veneer products from StoneWorks brand offering regionalized character along with full installation services through a turnkey philosophy, targeting residential and commercial exterior applications.
• Vinyl Windows and Patio Doors Vinyl windows and patio doors offered under brands including Simonton, American Craftsman (Home Depot exclusive), Silver Line, Atrium, Cascade Windows, Harvey, Ply Gem Canada, SoftLite, and Thermo-Tech, serving residential new construction, replacement, and commercial markets with energy-efficient options.
• Entry Door Systems Entry door systems under the North Star brand, designed for security and home safety with high-quality craftsmanship and materials.
• Metal Roofing Metal roofing products and accessories offered under multiple brands including MBCI (90+ profiles), American Building Components (ABC), Union Corrugating, Mueller, and Fortify Building Solutions, serving residential and commercial markets.
• Metal Wall Systems Metal wall panel systems and components for commercial and industrial buildings, with over 90 profiles along with secondary structural components, trim, and related accessories.
• Metal Building Systems Pre-engineered and custom metal building systems for commercial, industrial, and agricultural applications, offered under brands including Ceco Building Systems, Star Building Systems, Metallic Building Systems, Robertson Building Systems, Fortify Building Solutions, Mueller, Metal Sales, and Hypersteel/Simplisteel.
• Fence and Railing Ply Gem fence and railing products that are easy to install, exceptionally durable, low maintenance, and designed to last for decades.
• Gutters and Rainware Sectional and seamless rain gutter options with high-quality aluminum construction featuring rust-inhibiting primer and low-mar topcoat finish.
• Steel Siding High-end steel siding products under MAC Metal Architectural brand offering rich, unique colors with uncompromising quality and aesthetics, backed by a 40-year warranty.
• SunSteel Solar Panels with Double-Lok Metal Roofing Factory-integrated solar roofing system combining SunSteel solar panels with Double-Lok standing seam metal roofing panels, creating a streamlined solar roofing solution for commercial and industrial buildings through a single-trade installation approach.
• Armacoil Steel Jobsite Coils Contractor-grade jobsite steel coils available across the Metal Solutions network in Florida and Texas, providing consistent, high-quality materials to contractors through familiar distribution channels.
• Jenny Marrs Curated Exterior Palettes A collection of 12 curated exterior design palettes developed with designer Jenny Marrs, offering coordinated product pairings of siding, windows, stone, trim, and accent colors for homeowners and remodelers.
• Ply Gem Pro Academy Contractor training and certification program providing enhanced educational resources, installation training, and professional development for exterior contractor professionals, including VSI Certified Installer program and AIA-approved CEU courses.

Quantifiable outcome

• 40% reduction in window seal failure likelihood through window dunk test process
• +2 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

14 partnerships are on record, tiered core and minor.

• Jordan DaviscoreGTM or Marketing Partner · 22 January 2026Multi-platinum, award-winning country music artist serves as 2026 Home for Good Project Ambassador, helping raise awareness for affordable housing need. Jordan Davis brings music industry connections to strengthen and inspire communities through the partnership.
• AUO Energy BusinesscoreStrategic or Co-development Partner · 21 January 2026Partnership to integrate SunSteel™ solar panels factory-integrated with Double-Lok™ metal roofing panels, creating a streamlined solar roofing solution for commercial and industrial buildings. The integrated system arrives with solar panels pre-applied to each roofing panel, combining clean energy generation with metal roofing durability through a single-trade approach designed to simplify project delivery and reduce installation time.
• Anthony Alfredo / Young's MotorsportsminorGTM or Marketing Partner · 1 January 2026NASCAR Xfinity Series sponsorship featuring Hypersteel cold-formed buildings at Charlotte Motor Speedway, supporting motorsports team and driver.
• Lady A (LadyAID)minorGTM or Marketing Partner · 11 December 2025Partnership with GRAMMY Award-winning trio Lady A to donate $50,000 in windows and siding to Rockford Area Habitat for Humanity and contribute $10,000 to LadyAID's initiatives, supporting affordable housing during holiday season.
• Roc Solid FoundationminorStrategic or Co-development Partner · 10 September 2025Partnership to build hope for kids fighting cancer through multi-state initiative bringing 16 backyard playsets to children fighting pediatric cancer during Childhood Cancer Awareness Month and beyond.
• Sherwin-WilliamsminorStrategic or Co-development Partner · 1 January 2024Collaboration with global paint and coatings leader The Sherwin-Williams Company brings stylish selections to home exteriors. Partnership offers stylish array of window shutters in trend-forward palette of designer colors chosen in collaboration with Sherwin-Williams color experts.
• Metal Building Manufacturers Association (MBMA)minorStrategic or Co-development Partner · 1 January 2024Partnership with MBMA to help ensure building solutions adhere to industry-leading guidelines and best practices. MBMA provides standards and certification support for metal building manufacturers.
• Metal Roofing Alliance (MRA)minorStrategic or Co-development Partner · 1 January 2024Industry partnership supporting metal roofing standards and best practices, helping ensure product quality and installation standards across the metal roofing sector.
• Florida Roofing and Sheet Metal Contractors Association (FRSA)minorStrategic or Co-development Partner · 1 January 2024Industry partnership for roofing standards and contractor certification, ensuring adherence to industry-leading guidelines for metal roofing installations.
• International Accreditation Service (IAS)minorStrategic or Co-development Partner · 1 January 2024Accreditation partnership ensuring building products meet international standards through third-party verification of compliance and quality systems.
• Dave and Jenny MarrscoreGTM or Marketing Partner · 1 January 2023Multi-year partnership with HGTV Fixer to Fabulous hosts featuring Ply Gem, Mastic, Simonton Windows & Doors and American Craftsman products in home renovation projects. Partnership expanded in 2026 with Jenny Marrs launching 12 curated exterior design palettes. Products featured in fourth consecutive season of Fixer to Fabulous.
• Hanley Wood UniversityminorStrategic or Co-development Partner · 1 January 2023Partnership with Hanley Wood University to sponsor CEU course on Water Management Best Practices for Masonry Applications and Metal Wall Panel Systems, approved by AIA for continuing education credit.
• National Home BuilderminorStrategic or Co-development Partner · 1 January 2017Partnership formalized in 2017 to reclaim scrap vinyl siding, reduce packaging, and decrease wood needed for transportation using bulk crates. In 2023, program reclaimed over 1.6 million pounds of scrap for recycling.
• Habitat for HumanitycoreStrategic or Co-development Partner · 1 January 2016Home for Good project partnership to address critical need for affordable housing across North America. Cornerstone Building Brands donates products, facilitates house builds, and partners with country music artists to raise awareness and funds. Since 2016, the company has helped build or remodel over 930 homes and impacted 175+ communities with $4.5 million in donations.

Scale indicators13 records

Recent moves8 records

Expansion highlights5 records

Regional players

• Builders FirstSource: Builders FirstSource is the largest U.S. supplier of building products, prefabricated components, and value-added services to professional builders, competing as a downstream distributor and customer of Cornerstone's siding and metal building products.
• ABC Supply Co. ABC Supply is the largest wholesale distributor of roofing, siding, windows, and other exterior building products in North America, serving as both a major customer and channel partner for Cornerstone's metal roofing and siding brands.

Broad incumbents

• LP Building Solutions: LP Building Solutions is a leading manufacturer of engineered wood building products including siding, with structural and exterior product lines that overlap with Cornerstone's Siding & Accessories segment across residential new construction and R&R.
• Carlisle Construction Materials: Carlisle is a broad building envelope products manufacturer with a large commercial roofing division, competing with Cornerstone's MBCI metal roofing and wall systems across commercial and industrial construction markets.

Direct peers

• JELD-WEN: JELD-WEN is one of the world's largest manufacturers of windows and doors, directly competing with Cornerstone Building Brands' Aperture Solutions segment across residential and commercial channels. JELD-WEN's portfolio overlaps with Simonton, Ply Gem, American Craftsman, and other CBB window/door brands.
• Owens Corning: Owens Corning is a global building products leader with a major Roofing segment that directly competes with Cornerstone's Metal Solutions division (MBCI, Union Corrugating, Mueller). Cornerstone's incoming CEO Gunner Smith was previously President of Roofing at Owens Corning, indicating direct operational overlap.
• Masonite International: Masonite is one of the world's largest manufacturers of interior and exterior doors, directly competing with Cornerstone's North Star entry door systems and overall windows & doors portfolio across residential and commercial markets.
• MI Windows and Doors: MI Windows and Doors is one of the largest vertically-integrated vinyl window and door manufacturers in the U.S., directly competing with Cornerstone's vinyl window brands (Ply Gem, Simonton, Silver Line) particularly in new construction and multifamily segments.
• Andersen Corporation: Andersen is the largest manufacturer of windows and doors in North America, a privately-held peer that directly competes with Cornerstone's Ply Gem, Simonton, and Harvey window brands across both new construction and replacement/remodel channels.
• PGT Innovations: PGT Innovations is a leading manufacturer of windows and doors including impact-resistant products, directly competing with Cornerstone's window brands in hurricane-prone markets such as Florida and the Southeast.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@cornerstonebuildingbrands
• Instagraminstagram.com/cornerstone_buildingbrands

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries4 records

Funding overview

Funding rounds1 record

Investors

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

M&A8 records

Investments

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

Frequently asked questions about Cornerstone Building Brands