Skip to content
Business ProfileWindow Installers in Corona, California

International Window

Listed in Corona 4.00 (4 reviews)

International Window

International Window Corporation is based in Corona and manufactures vinyl and aluminum windows and doors. It has made them since 1957, operates production facilities in Fullerton and Hayward, and offers the Keltic 7800 multi-slide door line.

Last Updated October 2, 2026.

Featured Window Installers in Your Area

Compare a few featured businesses in this area.

Business Highlights
  • The company says it provides full warranty coverage for its products.
  • The company says its vinyl windows and patio doors undergo testing for changing climatic conditions.
  • The company says it maintains a fully staffed engineering department.
Service Area

Based in Corona.

Active Business Listing

International Window is one of 12 window installers ProsGrade lists in Corona, California.

Active
Public local listing
Listing details

11 services listed, including Gentry 5400 vinyl windows, Crown 5300 vinyl windows and Crown 5365 retrofit vinyl windows. Open weekdays, closed on weekends. Rated 4.0 from 4 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How International Window compares with the other 11 window installers on ProsGrade in Corona, using public Google ratings and review counts.

  • One of 12 Corona window installers on ProsGrade.

Services Covered

11 services
  • Gentry 5400 vinyl windowsOptional triple glazing; nail-on, block-frame and flush-fin options.
  • Crown 5300 vinyl windowsDual glazing; grids, leaded glass and v-groove options.
  • Crown 5365 retrofit vinyl windows
  • Lanai 5000/5100 hinged vinyl doorsAll-vinyl construction with an aluminum-reinforced subframe; in- or outswing.
  • Lanai 5600 vinyl sliding doors
  • Gentry 5900 vinyl sliding glass doors5½-inch frame depth; reversible; grid and v-groove specialty-glass options.
  • Keltic 7800 multi-slide doors
  • Acoustic vinyl windows and doorsAcoustic 9300 series windows.
  • Aluminum windowsAmbassador 8200, 6200 commercial and residential, and Imperial 6200 series.
  • Aluminum doorsAmbassador 8200 and 6800/6900 series.
  • Security screen doors

Reviews

What customers say

A customer praises the Keltic multi-slide doors for smoothly gliding rollers. A dealer describes the company’s aluminum lines as very good quality and its service as friendly, while a separate customer reports an aggressive, intimidating driving encounter involving a company truck.

Customer Reviews

Ivek Rodrigo

One of this company’s drivers behaved aggressively in traffic and used a large commercial truck in an intimidating way. This is unprofessional and unsafe, especially for a company whose drivers may interact directly with customers.

Ana Irais Hernandez Diego

??????

Donna Biss

Best Multi Sliding Doors Keltic Series. They are comparable to Fleetwood and Western but 1/3 of the price! Extreme Upgraded Roller system in which the doors glide smoothly! Love my doors!!

Kenny Tashman

I am an IWC dealer in West Hollywood. My Father started using International Windows back in the 1960's. They are a reliable company that is based in S. California. I use there Aluminum lines to supply my many customers. The quality is always very good, and the lead times are much better in since the pandemic is over. I find there pricing very competitive and the service is friendly. Give them a try on your next project. Thank you, Kenny Tashman President Tashman Home Center
View full reviewShow less

Write a Review

Share your experience with this business. Reviews are moderated before they appear publicly.

We'll email you a link to confirm your review. It's only sent in once you click it.

Frequently Asked Questions

Can a replacement-window installation leave the existing frame in place?

The company says an installer can leave the existing frame in place with little or no stucco damage when replacing its windows and doors.

What color choices are available for its vinyl products?

The company says several standard colors are available beyond white and tan.

Can International Window configure its Keltic door system for a 30-foot exterior wall?

The company’s FAQ says the Keltic system can be used for that wall, with multi-slide and pocket-door styles available.

How does International Window compare the energy performance of vinyl and aluminum windows?

Its FAQ says vinyl typically offers better energy efficiency, while thermally broken Ambassador aluminum products have energy calculations close to vinyl.