# Cornerstone Building Brands

> Cornerstone Building Brands is a Cary, North Carolina-based manufacturer of exterior building products for homes and low-rise commercial buildings. Created from the 2018 combination of NCI Building Systems and Ply Gem, it sells windows, doors, siding, stone veneer, metal roofing, wall panels and engineered metal building systems through a large portfolio of specialist brands and a 225-plus-location North American operating footprint.

- **Founded:** 2018
- **Headquarters:** Cary, United States
- **Founders:** Johnie Schulte (Founder of predecessor NCI Building Systems)
- **Team size:** Approximately 19,400 team members; the company also reports 93 manufacturing plants and 106 warehouses, distribution and retail outlets.
- **Products:** Windows and doors, Siding and accessories, Metal roofing and wall systems, Engineered metal building systems, Stone veneer and turnkey stone solutions
- **Notable:** Built a portfolio that the company describes as North America’s number-one manufacturer in windows, vinyl siding, metal accessories, metal roofing and wall systems, and turnkey stone solutions., Combined NCI Building Systems and Ply Gem in 2018 to span residential and commercial exterior categories., Expanded into residential metal roofing with Union Corrugating and Mueller Supply Company.

## Products & services

- **Windows and doors** — Vinyl, aluminum and clad-wood windows, patio doors and entry-door systems for new construction, replacement and renovation through brands including Ply Gem, Simonton, American Craftsman, Silver Line, Atrium, North Star and Cascade.
- **Siding and accessories** — Vinyl siding, shake and shingle profiles, trim, rainware and coordinated exterior accessories, including Mastic and Ply Gem lines.
- **Metal roofing and wall systems** — Metal roof and wall panels, components, trim and jobsite coils for residential, agricultural and low-rise commercial projects through MBCI, Mueller and other specialist brands.
- **Engineered metal building systems** — Pre-engineered structural systems and building packages for warehouses, manufacturing, retail, schools and municipal or institutional uses.
- **Stone veneer and turnkey stone solutions** — Manufactured stone products and installation-oriented solutions that add masonry aesthetics to residential and commercial exteriors.
- **Design and product-selection tools** — Home visualizers, product finders, curated exterior palettes and technical support that help homeowners and professionals coordinate materials and colors.

## Achievements

- Built a portfolio that the company describes as North America’s number-one manufacturer in windows, vinyl siding, metal accessories, metal roofing and wall systems, and turnkey stone solutions.
- Combined NCI Building Systems and Ply Gem in 2018 to span residential and commercial exterior categories.
- Expanded into residential metal roofing with Union Corrugating and Mueller Supply Company.
- Acquired Eastern Architectural Systems to add impact-resistant window and door capabilities in Florida.
- Reached more than 225 facilities across North America.
- MBCI marked 50 years in 2026.
- American Craftsman by Ply Gem ranked second in the manufacturer segment of the J.D. Power 2025 U.S. Windows and Patio Doors Satisfaction Study.
- Five additional Simonton products earned the Good Housekeeping Seal in 2026.

## Latest updates

- **2026-07** — Named Austin So executive vice president, general counsel and corporate secretary.
- **2026-06** — Launched 12 Jenny Marrs-curated exterior design palettes spanning Ply Gem windows and doors, Mastic siding and Ply Gem accessories.
- **2026-06** — Celebrated the 50th anniversary of the MBCI metal-components brand.
- **2026-06** — Introduced Armacoil steel jobsite coils through its metal-solutions brands.
- **2026-05** — Aligned 57 Fortify Building Solutions stores and a national sales center under the Mueller retail brand.
- **2026-01** — Announced integration of SunSteel solar panels with Double-Lok metal roofing panels through select commercial metal brands.
- **2026-01** — Appointed Vishal Singh president of the Windows & Doors business.
- **2025-08** — Gunner Smith became chief executive officer.

## Links

- Website: https://www.cornerstonebuildingbrands.com/
- LinkedIn: https://www.linkedin.com/company/cornerstone-building-brands
- Twitter/X: https://twitter.com/cornerstonebb_
- YouTube: https://www.youtube.com/@cornerstonebuildingbrands
- Instagram: https://www.instagram.com/cornerstone_buildingbrands/
- Facebook: https://www.facebook.com/CornerstoneBuildingBrands

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Profile page: https://yespress.io/cornerstone-building-brands
Published by YesPress — https://yespress.io
Last updated: 2026-08-13