- Alutech Corporation
 - Manufactures an assortment of flush aluminium doors and frames. - Amweld Building Products
- Manufacturer of hollow metal doors, frames and hardware for the commercial construction industry.
- Bane Nelson Inc.
- Industrial and commercial contractor that also manufactures doors and offers millwright services.
- Benchmark
- Developers of residential and commercial steel doors and frames.
- Bliss-Nor Am Windows & Doors
- Manufacturer of steel windows and doors for new and heritage construction.
- Byron Epp, Inc.
- Offering replacement door for problem openings, and more.
- Ceco Door Company
- Manufacturer of steel doors and frames.
- Curries Company
- Manufacturer of hollow metal doors and frames.
- Dawson Doors
- Manufactures custom stainless steel or naval brass doors and related architectural products.
- Dome'l Inc.
- Manufactures glass and aluminium products, including skylights, high-rise balcony doors, and bus stop/smoking shelters.
- Dunbarton Corporation, Inc
- Manufactures Rediframe steel door frames and Slimfold steel bifold and mirror doors.
- Firedoor Corporation
- Manufacturer of custom hollow metal doors and frames including rated fire, hurricane, and acoustic models.
- Hollow Metal Specialists, Inc.
- Provides prefabricated and custom doors, frames, windows, and hardware.
- Kewanee Corporation
- Manufacturer of hollow metal doors and windows for high rise apartment buildings and sport complexes.
- Next Door Company
- Provides stainless steel doors for residential, light commercial, and commercial use.
- Pocahontas Aluminum Company
- Manufactures and distributes quality heavy duty extruded aluminium doors and windows.
 Powershield Steel Doors and Windows
- Solutions for steel door sets in the commercial sector including fire doors, security doors, and glazed fire-screens.- Republic Builders Products
- Manufactures hollow metal doors and frames.
- Security Metal Products
- Designs and manufactures hollow metal doors and frames.
- Steelcraft Manufacturing Company
- Manufactures steel doors and frames for the commercial construction market.
- Steiner Doors and Windows
- Designers and manufacturers of custom aluminium doors and windows.
- Timely Industries
- Manufacturer of pre-finished steel door frames.
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