- Andersen Corporation
 - Makers of replacement and new home windows and doors. Browse the online catalogue of Andersen windows, doors, and window inserts. - Milgard Windows
- Manufactures vinyl, aluminium, and wood windows.
- International Window Corporation
- Manufacturer of residential windows and doors constructed of aluminium, wood or vinyl, insulated windows, tub and shower enclosures.
- Windsor Windows and Doors
- Manufactures wood and vinyl products, as well as sash replacement kits.
- Hy-Lite Block Windows
- An alternative to glass block, prefabricated windows of lightweight acrylic blocks.
- Traco
- Manufactures aluminium, vinyl, and composite windows for residential and commercial applications.
- Gorell Windows and Doors
- Manufactures custom windows and doors, including oroducts for lower home energy costs.
- Harvey Industries
- Manufacturer of wood and vinyl windows and distributor of roofing, siding, and decking materials.
- Caradco
- Columbia Glass & Window
- A window manufacturer of aluminium and vinyl windows, storm doors and windows, patio doors and more.
- Reynolds Building Products
- Offering a total line of siding, windows, shutters, raincarrier systems, accents, and accessories.
- Gilkey Window Company, Inc.
- Making custom wood and vinyl replacement windows as well as textured steel and fibreglass doors.
- Champion Aluminum Windows
- Manufacturers of thermally broken aluminium windows.
- Pihla-ikkunat
- Manufacturer of windows. In Finnish.
- AMSCO Windows
- Offers a wide selection of premium vinyl, aluminium, and wood fibre composite windows and doors.
 Corby Windows Group
- Fabricators and suppliers of pvc-u windows, patio doors, and conservatories.- Accu-Weld
- Manufacturers of vinyl replacement windows and doors with distribution throughout the U.S.
- Polaris Technologies
- Manufacturers of high performance glass, doors, solariums, Victorian images gazebos, and more.
- TRYBA
- Manufactures and sells PVC, wooden, and aluminium windows as well as roller shutters and doors.
- Window Clinic, The
- Supplies and installs double glazed products.
- Cossins Windows
- Manufactures vinyl, aluminium clad, and wood windows in both standard and custom sizes, plus exterior doors, patio doors, skylites, and sunrooms.
- Winstrom Manufacturing
- Producers of commercial and residential, vinyl and aluminium, architectural windows, vinyl replacement windows, speciality windows, storm windows, and storm doors.
- Kasson and Keller
- Offering a line of replacement and new construction windows.
- Midstate Millwork
- Offers Heartland vinyl, aluminium, and wood windows.
- Standard Patent Glazing Company, The
- Specialises in the design, manufacture, and installation of patent glazing systems throughout the U.K.
- GlazeGuard Ltd
- Manufactures and installs conservatories, double glazing, doors, garage doors, rooflines, decking, and fencing across London, Surrey, and Kent.
- Builders Prime Window & Supply
- Provides Pennsylvania, Delaware, and New Jersey area homeowners and contractors with windows, doors, roofing, decking, and more.
- Sol-A-Trol Products
- Manufacturers of heavy commercial windows.
- 3W Companies
- Diversified group of national firms that offer commercial construction services, environmental testing and remediation, medical facilities development and financing, and commercial/retail glass services.
 National Replacement Window Advisory Service / National Conservatory Advisory Service
- Surveys the work which needs to be done, sends details to companies for bid tendering, and provides obtained quotes to customer.- Abbe Window
- Manufacturer and exporter of windows, shutters, shower enclosures, sliding glass doors, and more.
- Tunbridge Wells Glass Works
- Double glazing services along with replacement windows, leaded lights, convex traffic mirrors, and safety glass from Tunbridge Wells Glass Works in Kent, U.K.
- Welglaze
- Supplier of double glazed windows, doors, and conservatories.
- Redbus Serraglaze Ltd.
- Manufactures coated light-sensitive windows.
- Dura-Pane Windows
- Offers double glazing windows, doors, and conservatories throughout Yorkshire.
- Crystal Windows and Conservatories
- Bespoke colour and wood grain finish PVCU windows and conservatories from Crystal Windows in Poynton, Cheshire, England.
- WeatherGard
- Michigan based manufacturer of vinyl replacement windows and doors. Installer of windows, doors, siding, roofing, gutters, and gutter protection.
- Window Replacement Center
- Find window replacements. Compare home replacement window estimates and quotes from local window contractors.
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