Take a look at our past work!

Bellwether Windows, Siding, & Doors

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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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


Check out some important pages from our company's website:


Read what 190+ clients have said about our services:

Our Work

1555 West Thomas Avenue , Englewood, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Boothbay Blue
  • Other Services
  • Other Services: Siding
  • HardiePlank Select Cedarmill Siding: Boothbay Blue
199 County Road 8038 , Fraser, CO, US
  • HardiePanel Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Rich Espresso
  • Other Services
  • Other Services: Siding
  • HardiePanel Select Cedarmill Siding: Rich Espresso
1555 West Thomas Avenue , Englewood, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Aged Pewter
  • Other Services
  • Other Services: Siding
1555 West Thomas Avenue , Englewood, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Timber Bark
  • Other Services
  • Other Services: Siding
1555 West Thomas Avenue , Englewood, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Timber Bark
  • Other Services
  • Other Services: Siding

Customer Testimonials

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Megan Biller - 28585 Evergreen Manor Drive , Evergreen, CO, US
Great experience beginning to end. Laura O., Dylan, Amy, and Angel really took care of us and got what we needed and wanted within a reasonable budget for the project. No complaints and would definitely recommend to friends and family.
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Joyce Touchton - 3967 South Pearl Street , Englewood, CO, US
They provided excellent service from beginning to end. Our new windows are beautiful and the process of planning and installation was so easy. The installation team was extremely professional and considerate, we could not be happier with Colorado Siding and Repair!
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M Forrester - 14613 West 62nd Circle , Arvada, CO, US
We were very pleased with the work done by Bellwether Siding. We needed replacement siding, but the profile we have is no longer available. They were flexible in making sure the work done was what we actually needed. I especially appreciate that they were willing to do a smaller job, just three walls, rather than the whole house. Alejandro, the crew lead, was excellent. Great communication and follow up.
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Donna Gordon - 7481 Exeter Court , Castle Pines, CO, US
Bellwether did a great job of replacing the siding on our home with pre-primed Hardie board in Castle Pines. The siding looks perfect and the detailing was done with precision. We couldn't have been happier with the responsiveness of the company to any questions or concerns we might have and the crew worked well to complete the project in a timely fashion. It was a pleasure to work with the administrative staff, too. There was always a friendly and helpful voice on the other side of the line ... Read more
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Dan Rowe - 133 South Sherman Street , Denver, CO, US
My project was very unique. I only needed to replace my gables and side a shed to match. I had 5 different quotes and Bellwether was the only reasonable one that was eager to do the job. I couldn't be happier with how it came out. It was such a small 4-day project and they worked outside of their comfort zone on my unique shed situation (4 doors and swing-in window). Thank you so much for doing the great work at a reasonable price!