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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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
Bruce LaBarr — review for Bellwether Windows, Siding, & Doors
Bruce LaBarr - 2138 Sunstone Drive , Fort Collins, CO, US
We recently had our house re-sided by Bellweather Siding and are very satisfied with the results. Their crew completed the project quickly and did a quality job. Their follow was thorough, and they quickly addressed all our needs and concerns, making the process stress-free. The craftsmanship is outstanding, and our home looks fantastic. I highly recommend Bellweather Siding for their exceptional service, competitive pricing and their dedication to customer satisfaction. David Dembalski went a... Read more
Rosanne DeMattia Pash — review for Bellwether Windows, Siding, & Doors
Rosanne DeMattia Pash
We were so impressed with Bellwether as they stood behind their work! Seth’s knowledge base on James Harding and siding install was evident after interviewing many companies. We did get off to a rocky start with a poor construction crew however Cole and Dylan listened to our concerns. They got in an amazing crew with Angel as the crew lead and the work was impeccable!!! Thank you Katie for following up. Again this is a great company who totally took care of us! We look forward to posting pics w... Read more
Z — review for Bellwether Windows, Siding, & Doors
Z
Bellwether replaced the siding on my house. It was a complicated project but they did an excellent job. They were very responsive from beginning to end, with no drama and no surprises. I highly recommend them.
Kooper Vehige — review for Bellwether Windows, Siding, & Doors
Kooper Vehige
We recently got new windows and siding and absolutely love the outcome! The crew that came out was so fast and very nice/respectful!
Saraya — review for Bellwether Windows, Siding, & Doors
Saraya
When we decided it was finally time to replace our siding and windows, we did a lot of research on different companies. We ended up choosing Bellwether and couldn’t be happier! Their price was better than our other quotes and they were so thorough and professional. They were upfront and answered all of questions honestly. We never felt rushed or like they were trying to sell us more than we needed. The project went smoothly and we loved the text thread they set up during the project for communic... Read more