Bellwether Windows, Siding, & Doors of Colorado

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About Us

Based in Denver, we proudly serve the greater Colorado Front Range and mountain communities, including cities such as Aurora, Boulder, Colorado Springs, Fort Collins, and surrounding areas, even reaching into Cheyenne, Wyoming.. Reach out to us if you’d like a consultation, (303) 323-8578

About Us

At Bellwether, we’re Colorado’s top-rated exterior remodeling company specializing in fiber cement siding, energy-efficient window replacement, and custom entry doors. As the #1 James Hardie siding installer in Colorado, we help homeowners protect and beautify their homes with durable, weather-resistant materials built for Colorado’s unique climate.

Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service every step of the way. Our award-winning designs and certified installation teams ensure long-lasting value and stunning results.

We’re proud to serve the Front Range and beyond, helping families fall in love with their homes again.


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Read what 190+ clients have said about our services:

Recent Work

2981 East 163rd Place,Thornton, CO, US

2981 East 163rd Place , Thornton, CO, US
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6824 Olympus Drive,Evergreen, CO, US

6824 Olympus Drive , Evergreen, CO, US
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  • Other Services
  • Other Services: Siding

Customer Reviews

See what our customers are saying — click any logo to read our reviews on that platform.

Bellwether Windows, Siding, & Doors reviews on GoogleBellwether Windows, Siding, & Doors reviews on Project Map It
Pam Lanza — review for Bellwether Windows, Siding, & Doors
Pam Lanza - 745 Golden Gate Drive , Golden, CO, US
Bellweather was great to work with from sales team, site manager and installation crew. They showed up on time and did an excellent job. The crew was very nice and respectful and the workmanship is outstanding. When the project was completed, the crew walked the site with us to make sure everything was satisfactory, then, the site manager walked the project with us and went over every inch of caulk, piece of flashing and board. It was installed by James Hardy Board trained people who knew what t... Read more
Martha Griego — review for Bellwether Windows, Siding, & Doors
Martha Griego - 1166 West Radcliff Avenue , Englewood, CO, US
They did siding on our home and the men they sent were so professional and communicated in what they were doing. They would ask where we wanted mail box, address, etc. I would highly recommend them.
Joe Murray — review for Bellwether Windows, Siding, & Doors
Joe Murray - 2875 Highland Meadows Drive , Florissant, CO, US
Project was installation of Hardie Board on cabin and detached garage near Cripple Creek. Hand holding through process of selecting colors was beyond expectations. Communications before, during and after were excellent. Neighbors are impressed. Highly recommend Bellwether.
Christine Perez — review for Bellwether Windows, Siding, & Doors
Christine Perez - 28525 Tepees Way , Evergreen, CO, US
We used Colorado Siding and Repair for a very complicated exterior siding removal and replacement. Their staff was very responsive and answered all of our questions before, during and after the project. Their installers were on time every day, worked extremely hard throughout the project and did an excellent job. We had just moved into the house and this was a very stressful project for us. Colorado Siding was extremely helpful and competent in explaining the process and timelines and re... Read more
George Anderson — review for Bellwether Windows, Siding, & Doors
George Anderson - 993 West 124th Drive , Westminster, CO, US
Were very flexible and professional in replacing my siding to new code and painting it our desired colors plus the team were very hardworking and diligent to produce a great fit, finish and result. Highly recommended.