Greyrock Window & Door
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Whether you need window replacement, a custom new front door, or windows retrofitted, you want a window and door company that is not only competent, but also cares. Greyrock Window & Door, based in Fort Collins, offers the best window replacement and installation services, as well as siding replacement and custom doors.

Our window company offers the highest quality products that will not only make your home more energy efficient and reduce your carbon footprint, but we also ensure that your windows are exactly what you want. After all, you want to enjoy looking out as it snows along the Front Range and in Wyoming, find reprieve from the heat of hot July days, and be protected when errant hail storms make their way through Colorado and Wyoming.
Services
Professional replacement for windows, doors, and siding in Northern Colorado. Welcome to Grey Rock Window & Door Inc. We provide window, door, and siding replacement services to the Fort Collins community and the surrounding areas. We are a local and family-owned business with more than 15 years of industry experience.
When your home needs new windows or a new door, look not further than Grayrock Window & Door. We serve Fort Collins & Southern Wyoming with beautiful storm doors, bay windows, entry doors, and exterior siding. We offer window installation and door installation to simplify your life. Life is too short not to be able to let the light in.
A few months ago, I took on the task of finding new windows for our home. After what seemed like ages of searching, we stumbled upon Greyrock Window & Door in Fort Collins. Whether youre ready for it or not, winter is almost here. For Coloradoans all along the Front Range, that means cold nights and a mix of both sunny and snowy days.
Providing your home with trusted, energy-efficient window solutions from our exclusive Vanguard Windows dealers. Humans are creatures of comfort. We enjoy a cool, drafty climate during the warmer months, and a warm, cozy indoor living space during the colder months.

As a local window company based in Fort Collins, we experience virtually all temperature extremes, and its important to make sure that your homes windows are capable of keeping you and your family comfortable year-round.Thats why Greyrock Window & Door only provides the best-quality windows and doors to ensure that your home keeps the heat out during the summer, and keeps it in during the winter.
Is it time to upgrade your home with new windows? You can trust Greyrock Window and Door to provide superior products and expert craftsmanship for your window replacement project. If your windows aren't functioning as they should or your home is starting to show its age, it may be time to replace your windows.
Reviews (5)
Bopper Smith
Bopper Smith
Nov 06, 2021
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Door was due to be installed in Sept. I called salesman in Oct 4 times. 1st time said his contact was on vaca, 2nd call he said corporate had no internet, 3rd n 4th call he never returned. Called Provia directly they told me production delays but door sched to start build next week. Finally got door installed. Installers didn't have trim in truck. I've now called 4 times to Greyrock n NEVER get a return phone call. To add insult to injury side light has a ding in it. I do NOT recommend Greyrock - plenty of other competition that hopefully offers better customer service.
Carol Ballantine
Carol Ballantine
Aug 26, 2020
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Positive: Quality
We had Greyrock replace all our windows and front door. Their products are high quality and everyone is friendly and a pleasure to work with. New door was installed today and it is gorgeous!!! Bill and team - thank you.
Marty Bateman
Marty Bateman
Aug 30, 2019
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We replaced our windows and Greyrock did a great job! Not a high pressure sales job but gave us all the information we needed. They look great and they are very reasonable in price -- actually our lowest quote.
Lara Wiley
Lara Wiley
Jun 05, 2018
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I had a fabulous experience with Greyrock! They installed a new slider door and front window and I couldn’t be more pleased! They were so nice to work with, knowledgeable and I felt confident that I was getting a quality product! I would highly recommend!!!
Elycia Feldman
Elycia Feldman
May 20, 2018
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Great company everyone that we worked with was pleasant! Bill was not only great about communicating project details but also explained the products with knowledge and wisdom. The install was seamless and done by experienced staff. We are super happy with our new windows and doors! I would highly recommend Greyrock to anyone looking to improve the value of their home and quality of their life.