Our Services

Replacement Windows & Patio Doors

Cornerstone is proud to install vinyl and fiberglass replacement windows and patio doors from the industry’s premier suppliers, Simonton and Milgard. Both companies have exceptional warranties, including a double lifetime warranty. Please ask for more details.

Custom Entry Doors

Cornerstone offers a wide selection of custom entry doors. Whether you prefer the elegance of a classic design, the vintage feel of a craftsman or the the clean lines of a modern, Cornerstone helps homeowners achieve the look they want for the front of the home.

Tony Szik's Cornerstone Doors & Windows, Inc., Door Installation, Torrance, CA

Transform your home with new windows & Doors!
Contact us today for a FREE estimate

Simonton offers on windows and patio door rebates
Cornerstone Windows banner - Serving the South Bay for 25 years

Cornerstone Windows & Patio Doors

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Cornerstone Windows will be in touch as soon as possible to discuss your project