- Fibertec Window Manufacturing, Ltd.
 - Fibertec is a fibreglass window and door manufacturer of fibreglass double hung windows, casement, awning, and sliding windows, patio doors, entrance doors, as well as vinyl, wood, and aluminium windows. - Kaylien Corporation
- Manufactures fibreglass residential and commercial doors, including fire-rated, waterproof, contemporary/traditional, and bronze, brass, and pewter surfaced.
- Kensington Windows
- Manufacturer of vinyl replacement windows. Offers energy efficient windows and glass doors sold through dealers and retailers.
- North Star Manufacturing Ltd.
- Fabricator and extruder of vinyl windows and doors.
- PGT Industries
- Manufactures hurricane resistant aluminium and PVC glass windows and doors. Also offers patio rooms and custom vinyl enclosures.
- Special-Lite, Inc.
- Manufactures doors and accessories from a variety of materials. Standard and custom configurations available.
- StrongFiber Co., Ltd.
- Makers of fibreglass doors.
- Thermoplast
- Thermoplast is a Canadian PVC profile extruder dedicated to the window and patio door industry.
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