- Alutech Corporation - manufactures an assortment of flush aluminum doors and frames.
- Alwind Industries, Inc. - manufactures aluminum windows and doors for schools, hospitals, commercial and institutional buildings.
- 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.
- Columbia Commercial Building Products - manufacturer of aluminum projected, hung and casement windows. CCBP is a subsidiary of Columbia Ventures Corporation.
- 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 aluminum 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.
- EFCO Corporation - manufacturer of aluminum windows, entrances, storefronts, and curtain wall systems.
- Emerson Engineering Company, Inc. - manufacturer of fire rated stainless steel or hollow metal doors, frames, and rolling shutter and vertical slide type pass windows.
- FIB-R-DOR - manufacturer of fiberglass door systems for industrial applications. used in heavy corrosive environments.
- Graham Manufacturing - offering a full range of commercial architectural premium-grade wood doors.
- Hollow Metal Specialists, Inc. - provides prefabricated and custom doors, frames, windows, and hardware.
- JWS Manufacturing Inc. - custom manufacturers of architectural wood doors, frames, and millwork.
- Kewanee Corporation - manufacturer of hollow metal doors and windows for high rise apartment buildings and sports complexes.
- Republic Builders Products - manufactures hollow metal doors and frames.
- Security Metal Products - designs and manufactures hollow metal doors and frames.
- Star Building Systems - supplier of custom-engineered building systems.
- Steelcraft Manufacturing Company - manufactures steel doors and frames for the commercial construction market.
- Superior Window Corporation - manufactures a variety of commercial grade windows.
- Timely Industries - manufacturer of pre-finished steel door frames.
- Window Technologies, Inc. - designs and manufactures commercial grade windows, acoustical windows, glass doors, aluminum french doors, and curtainwalls.
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