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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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.

Joyce Schilling — review for Bellwether Windows, Siding, & Doors
Joyce Schilling
Very talented crew with a impressive work ethic. Errors were caught early and quickly corrected. Very professional crew that worked together seamlessly. We ate happy with the new look. We would recommend Bellweather, in fact we are already telling our neighbors.
B May — review for Bellwether Windows, Siding, & Doors
B May
We recently had new siding installed on our home by Bellwether, and the entire experience was outstanding from start to finish. Our sales rep, Seth Blue, did an excellent job understanding our goals and helping us choose the right siding to fit both our vision and budget. Dylan Harden, our Project Manager, made sure everything ran smoothly and kept us informed throughout the process. His crew lead, Julio, and the rest of the team worked with incredible attention to detail and took the time neces... Read more
Wendy Bennington — review for Bellwether Windows, Siding, & Doors
Wendy Bennington
Everyone was so nice and personable. Dylan was a great project manager and communicated well. We love our new Hardie board siding and the look of our house.
Chris A. — review for Bellwether Windows, Siding, & Doors
Chris A.
Could not be happier with this company. Mike Sipes was incredibly patient and helpful, Cole did a fantastic job as managing everything, as did everyone in the office. And the windows and siding all look fantastic. We constantly get compliments from people passing by. Would 100% recommend.
Louis Harris — review for Bellwether Windows, Siding, & Doors
Louis Harris
We had a great experience with Bellwether from beginning to end. Dylan, Angel, and Amy were great to work with and ensured the project was completed on time and within budget! Would highly recommend them!