IWC

International Window is a California manufacturer of aluminum windows, vinyl windows, and sliding & hinged patio doors. Operating two production facilities one in Fullerton (Southern California) and a second in Hayward (Northern California) reducing lead times with “local” manufacturing and distribution. 

At Discount Builders Supply & Hardware in San Francisco we offer a full selection of IWC vinyl windows & patio doors, aluminum windows & patio doors as well as  acoustic windows.

Our friendly team is here to assist with any questions you might have, help you choose the right IWC door or window, or provide a quote whenever you’re ready.

Product Catalogs & Guides

See below to find IWC aluminum & vinyl window patio door brochures and installation guides or visit Discount Builders Supply & Hardware in San Francisco.

Vinyl Windows & Doors

View IWC Gentry and Crown vinyl windows and sliding patio doors. With complete window and door hardware options as well as grid and glass offerings.

Aluminum Window & Door

Aluminum 6200 Window Series with Residential single hung, full, half, quarter circle, picture, horizontal sliding, casement and awning windows and Commercial windows. Also details on Imperial aluminum patio doors.

Keltic Windows & Doors

Keltic Door Series available in multi-slide, pocket doors, 90 degree corners, hinged doors & custom configurations. Keltic Window Series include hinged, single hung, and horizontal sliding windows.

Ambassador Series

Ambassador Series includes both windows and sliding glass doors. Line options include offerings with ThermoTech design for energy efficiency dual colors to mix earth tones on inside and neutral colors on exterior.

Window & Door Care

Maintenance guide and checklist for your IWC doors and windows. Covering frame surfaces, drainage system, insulating glass, hardware, rollers and weather strip.

Retrofit

Replacement window installation instructions.

New Construction

New Construction window installations instructions.

Block Construction

Block Frame window installation instructions.

special order Form

Thank you for your order. Please Provide us the following information to  process your credit card
* Copy of Cardholders Credit Card and ID required.
* DBS requires a photo ID for each authorized user.
Credit card form must be completely filled out and all arequired copies turned in or it cannot be processed.