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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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
paul jost — review for Bellwether Windows, Siding, & Doors
paul jost
Bellweather Windows, Siding and Doors team updated our 1975 windows & siding and did a awesome job! The entire team from up front to the execution has been an incredible group to work with and was amazed by the speed of execution and quality of work during install. Will be definitely recommending them to friends, family and neighbors.
Stephanie Melzer — review for Bellwether Windows, Siding, & Doors
Stephanie Melzer
We had Bellwether replace our siding and it was a great experience! The whole process was quick and went smoothly. The office was very easy to communicate with and talked us through everything and the contractors were excellent. We literally have no complaints and are very happy with the end result!
John Savoy — review for Bellwether Windows, Siding, & Doors
John Savoy
Bellwether exceeded my expectations! From my first contact with salesman Steve Dennis and then Project Manager Paul Dickens, both listened and answered my questions and assured me the project would be done to my expectations. Well the day of the job 15 men showed up, headed by lead man Angel. His crew was so well orchestrated, they stripped the whole house of all cedar siding, wrapped and started siding the first day. The attention to detail was amazing and the house was fully sided with Hardie ... Read more
Matt Wallace — review for Bellwether Windows, Siding, & Doors
Matt Wallace
Bellwether took such incredible care of my family and our home from start to finish. They serve professionally, communicate exceptionally, and do such high quality work! I couldn't be happier with my new siding, and I highly recommend Bellwether!
Michael Tyra — review for Bellwether Windows, Siding, & Doors
Michael Tyra
The rep who came to the house was very thorough and professional. The quote was quite detailed and made me feel everything was covered. I would have happily gone with them, but their price was much higher than the others. I just couldn't do it.