Replacement Experts
Your home is a family’s biggest financial investment. Replacement windows, entry doors, french doors, and sliding and swinging glass patio doors are proven and cost effective way to improve your home’s value, beauty, energy efficiency, security and reduce outside noise.
In business since 1999, Cornerstone installs products from the industry’s premier companies; Simonton, Win-Dor, Milgard, and Masonite. All products are expertly installed and include exceptional warranties, including a double lifetime warranty.
Cornerstone’s installation system allows most projects to be completed in one day with no drywall or stucco damage. Protecting your home and furniture during the installation process is always a priority.
Cornerstone offers a free, in-home, no pressure consultation as well as free visual estimates.
Our Projects
Cornerstone uses only full-time employees. There are no sub-contractors. This maintains a high level of quality control and a seamless installation process. Most jobs are completed in one day!
We are proud to be voted a South Bay Favorite for Windows & Doors in 2022, 2021 and 2020 by readers of the Daily Breeze!
We’re happy to report that due to a large backload of installations, we’re unable to contract any new business until late April 2024. We will start returning emails and phone calls on April 29th.
If you’re a current customer with an installation date, please leave a short message and someone will return your call promptly.