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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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
Bryan Dickinson — review for Bellwether Windows, Siding, & Doors
Bryan Dickinson
I had talked to several former customers before deciding to hire Colorado Siding Repair, so I was confident they would do a good job. But they exceeded even my most optimistic hopes. From start to finish, in all aspects, this project was executed professionally. Tom was a very helpful and patient salesman. He never pressured us or used "hard" sales tactics. He answered our questions honestly and worked with us to keep the project within our budget. He positively influenced our color and style ch... Read more
Ken Grimes — review for Bellwether Windows, Siding, & Doors
Ken Grimes
CSR installed all new siding on our home, and they did a fantastic job! The work crews were very thoughtful and professional with their workspace and cleanup. The office staff was friendly and easy to work with as well. We are very happy with this contractor and with the new siding job on our house--highly recommended!
Alison Levernier — review for Bellwether Windows, Siding, & Doors
Alison Levernier
Replaced my siding
Alex Lehr — review for Bellwether Windows, Siding, & Doors
Alex Lehr
Hands down will be using this company again! Cash (the Co-Founder) came out to evaluate the north side of our home, and with some simple explanations, he saved me over $9,600 by doing it myself! (Most companies will charge you to replace the whole side instead of the couple of pieces that might be broken) Not every situation will be like this, but the time Cash spent walking me through the project was something I haven’t seen from a company in a long time! Thanks again, Colorado siding Repair, a... Read more
CL Google — review for Bellwether Windows, Siding, & Doors
CL Google
We used Colorado Siding Repair to replace the siding on our home. We went with the James Hardie ColorPlus siding and had the entire house done. Siding, trim, fascia, soffits, etc. The house looks absolutely amazing now. It really modernized our almost 45-year old house. People continue to stop and comment on how good the house looks, and ask us who did the installation. The CSR crew did such great work. Honestly, they did much more than I ever expected them to do. And certainly the quality is be... Read more