- Advanced Solar Products
 - Manufacturer and distributor of sunrooms, conservatories, windows, and doors. - Ambico Limited
- Manufacturer of steel doors and frames for niche markets, including acoustic, bullet and blast resistant, stainless, lead-lined, and brass.
- APEX Industries Inc.
- Manufacturer of doors and frames and overhead and sliding doors.
- Bélisle Doors & Windows Inc.
- Custom-built; includes list of distributors.
- Bliss-Nor Am Windows & Doors
- Manufacturer of steel windows and doors for new and heritage construction.
- Boccam
- Manufacturers of doors, mouldings and wood components.
- Bowen Windows Inc.@
- Byrcon Wood Products
- Manufacturer of wood interior, exterior, and cabinet doors. Custom and standard sizes and designs available.
- City Window and Glass
- Installation of custom made windows and doors. Factory direct warehouse prices.
- Clearlite Glass (B.C.) Ltd
- Offers commercial and residential window and door repairs, sealed unit replacements, and more.
- Cossins Windows
- Manufactures vinyl, aluminium clad, and wood windows in both standard and custom sizes, plus exterior doors, patio doors, skylites, and sunrooms.
- DraftSeal
- Manufactures weatherstripping and threshold products for commercial and residential applications.
- Extrex International Ltd.
- Importer and distributor of automatic door sensors and switches.
- Fenplast Inc.
- Manufactures PVC windows.
- 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.
- Hoffmeyer's Mill
- Products include Victorian screen doors, garden arbours, benches, antique reproductions, mouldings, wood sash and lumber.
- Huron Window Corporation
- Manufactures PVC windows and doors.
- Inline Fiberglass Ltd.
- Manufactures fibreglass profiles for door and window frames and sash. Also offers pultruding machines.
- JWS Manufacturing Inc.
- Custom manufacturers of architectural wood doors, frames, and millwork.
- Kohler International Ltd.
- Manufactures vinyl windows.
- Larsen and Shaw Limited
- Manufacturer of continuous hinges, butt hinges, and furniture hardware in various metals.
- Loewen Window Centre
- View photographs and browse for information about a range of wood windows and doors.
- McLeod Windows
- Custom PVC window and door system manufacturers and suppliers for residential, commercial, and industrial construction contractors.
- Omniglass Ltd.
- Design and manufacture of pultruded fibreglass window and door frames and sashes for use in residential construction.
- Ontario Screen Systems Inc.
- Offers Phantom screens for doors and windows. Compact, retractable insect screens that roll out of sight when not in use.
- Oran Industries Ltd.
- Vinyl window manufacturer.
- Plastiques Industriels RPG Ltee
- PVC extruder for the door and window industries.
- Pomatek
- Manufacturer of insulated steel doors.
- Portes et fenêtres Vitrostar
- Makes, sells, and installs its products.
- Ridley Windows and Doors Inc.
- Manufactures custom and speciality wood windows and doors for commercial, residential, and institutional applications.
- Silliker Glass/G.E. Silliker & Sons Ltd.
- Manufactures, distributes, and designs glass, windows, doors, entrances, and store fronts. Both wholesale & retail.
- Sunshine Door
- Manufactures the Sunshine Door polycarbonate panel door that allows sun into workshops.
- Top Rollshutters Inc.
- Manufactures storm shutters.
- Verre Select
- Producing decorative stained glass, leaded glass, and 3-dimensional panels for door and window manufacturers.
- Vitrerie J.L. Inc.
- Manufactures and installs commercial, industrial, and institutional windows.
- West Island Glass Inc.
- Retail distributor of windows, doors, glass, mirror and related products such as screens and glazing accessories.
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