Ply Gem Industries (Siding & Windows)
Vinyl and composite siding, trim, soffit, and specialty exterior building products.
Ply Gem (now part of Cornerstone Building Brands) is one of the largest manufacturers of exterior building products in North America, producing a comprehensive portfolio of vinyl siding, soffit, trim, fence, railing, and stone veneer products for residential new construction and remodeling. The company's brands include Variform, Mitten, Napco, Cellwood, and Georgia Pacific Building Products siding, distributed through home centers, building product dealers, and specialty distributors. Ply Gem products are manufactured at facilities across the US and Canada serving builders, contractors, and remodelers.
- Type
- Manufacturer
- Location
- Cary, NC, United States
- Founded
- 1943
- Website
- plygem.com
- Categories
- Building & Construction Materials, Plumbing, HVAC & Fixtures
- Markets
- United States, Canada
Verified facts
- corporate-mail-on-domain (green), checked 2026-08-09 Mail server of the company domain
- customer-reviews (amber), checked 2026-08-09 Sitejabber
- debarment-clear (green), checked 2026-08-09 OpenSanctions
- sanctions-clear (green), checked 2026-08-09 OpenSanctions
- lei-active (green), checked 2026-08-23 GLEIF global LEI register (golden copy)
- domain-registered (green), checked 2026-08-09 Domain registry record
Claimed certifications
- ISO 9001, Quality Management IAF CertSearch
Import rules for these goods
- Construction products sold in the EU need a Declaration of Performance and CE marking under the Construction Products Regulation. European Commission (CPR)
- Cement and steel components imported into the EU fall under CBAM (definitive regime from 1 Jan 2026). European Commission (CBAM)