Andersen Window Service is a window replacement company headquartered in Littleton and serving the Denver Metro Area. As a reputable, family owned and operated window dealer, we constantly strive for excellence with outstanding installation in Andersen window and door replacements. We have access to the complete line of Andersen replacement windows, as well as other manufacturers.
To serve our customers with professionalism and honesty from the start to the end of their project, using the knowledge and expertise acquired since we began in the window and door industry. Window experts experienced in working with architects, builders and homeowners to ensure your vision becomes a reality.
To serve our customers with professionalism and honesty from the start to the end of their project, using the knowledge and expertise acquired since we began in the window and door industry. Window experts experienced in working with architects, builders and homeowners to ensure your vision becomes a reality.
Services
GWS Window Service has grown to be the premiere Andersen Windows and Doors Window and Door Provider in the greater Denver area. We have built our outstanding reputation on providing superior products, exceptional customer service, and skilled craftsmanship. GWS Window Service has added value as a Service Provider for Andersen Windows.
Repair or replace broken Andersen window sashes, weather stripping, balance boxes, locks, and other window components. Fixing a hail damage window seal may be more trouble than it is worth. While it is possible to fix an Andersen window, the most common reason people call us is that we are a Certified Andersen Window Repair and Replacement Company.
Andersen Narroline double-hung window conversion kits are designed specifically to retrofit existing Narroline windows (1968 and newer), turning them into easy-to-clean tilt-wash double-hung windows with with far more energy-efficient windows. High-Performance Low-E4 glass comes standard and is 45% more energy efficient than ordinary dual-pane glass in winter and 56% more energy efficient in summer*.
GWS Windows offers Andersen windows and patio doors. Carrying the best products is part of our DNA, that is why we analyzed the Denver market and offered the best windows and doors for all of our customers. When you are renovating your home, we've got what you're looking for. New Andersen windows and doors can be a major investment, but if you choose wisely, you're rewarded with better light, comfort, added security and energy efficiency.
As our most popular series with our longest-standing products, the 400 Series brings you the best overall blend of performance and style to satisfy just about any window or door need. With years of engineering and craftsmanship to build on, these windows are designed to live up to your high standards.
Reviews (9)
William Oswald
Dec 15, 2021
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This family-owned, Denver-based company did a fantastic job!
First, Jeff and team came over to quote us and were very professional and knowledgeable. We'd receive two quotes already with descriptions of work to be performed, and after hearing their installation process they were obviously the better choice.
The windows were delayed, because everything has been, but Andrea kept us informed about what was going on.
Montas and Erikas were the installers. They were polite, professional, and did fantastic work. The quality of their work and the Gravina's process was obvious from go, and they followed
First, Jeff and team came over to quote us and were very professional and knowledgeable. We'd receive two quotes already with descriptions of work to be performed, and after hearing their installation process they were obviously the better choice.
The windows were delayed, because everything has been, but Andrea kept us informed about what was going on.
Montas and Erikas were the installers. They were polite, professional, and did fantastic work. The quality of their work and the Gravina's process was obvious from go, and they followed
Mark Scheuneman
Apr 17, 2021
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Christine Webb
Jan 19, 2021
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Jeff and the team at Gravina’s were amazing to work with! Their finished product is beautiful, I couldn’t be happier with my new windows and doors. They were responsive starting from the very beginning of the process, had fair pricing, and were constantly checking in to make sure I was happy during the installation. I would highly recommend!
Brian Strom
Aug 28, 2020
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Positive: Punctuality, Quality, Responsiveness, Value
We had Gravina’s replace all the windows in our home. Couldn’t be happier in our decision to go with them! From start to finish everything was as promised. Jeff, the owner had great recommendations and walked us through every step of the way. Would recommend this outstanding company to everyone!
We had Gravina’s replace all the windows in our home. Couldn’t be happier in our decision to go with them! From start to finish everything was as promised. Jeff, the owner had great recommendations and walked us through every step of the way. Would recommend this outstanding company to everyone!
Dan Manning
Aug 26, 2020
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Jeff helped us select the perfect windows and doors for our budget and needs and worked with our insurance company on some hail damage so we didn't have to. His install team was professional, clean, friendly, and skilled. We trusted them enough to give them access to our house while out of town for the second phase of our project and it turned out great. 10/10
Jonathan Mann
Jul 29, 2020
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Positive: Professionalism, Quality, Responsiveness
Gravina's wasn't the cheapest option, but I feel like received what I paid for and am very pleased with my new windows. Staff were very professional, they handled working through COVID19 well, and consistently seemed focused on my job. I highly recommend you speak to them if you're considering new windows for your home.
Gravina's wasn't the cheapest option, but I feel like received what I paid for and am very pleased with my new windows. Staff were very professional, they handled working through COVID19 well, and consistently seemed focused on my job. I highly recommend you speak to them if you're considering new windows for your home.
Jen Carter
Jun 25, 2020
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I didn’t think that customer service like that which Jeff and his team provided was still possible! They could not have been more responsive or professional every step of the project, and the quality of the work they did was outstanding. They may not be the cheapest windows in town, but we feel that the experience and end product were well worth the money. We highly recommend Gravina’s!
Robert Wong
Nov 28, 2019
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Couldn't be happier with the decision to go with Gravina's. In addition to providing a MUCH better quote than their competitors, the installation was super quick and extremely well done. It was a pleasant experience the whole way through, from the people to the job itself. Would definitely recommend!
Ken Imler
Sep 22, 2019
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We had half of our windows replaced last year with Marvin Infinity windows and we were so pleased with the windows and Jeff's workers that we had the rest done this year. The crews are courteous, professional and friendly. They also do a great job of cleaning up and answering any questions. The quality of the Marvin windows is great. Take it from a man who worked in quality assurance for 45 years, these are great quality windows and great value for the price. And Gravina's did a great job on the installation.
