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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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

3260 El Pinal Drive , Evergreen, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Pearl Gray
  • Other Services
  • Other Services: Siding
6968 Alpine Drive , Parker, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Khaki Brown
  • Other Services
  • Other Services: Siding
8016 South Ammons Street , Littleton, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Cobblestone
  • Other Services
  • Other Services: Siding
7620 Frontier Circle , Morrison, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Night Gray
  • Other Services
  • Other Services: Siding
6051 South Newport Street , Centennial, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Primed
  • Other Services
  • Other Services: Siding

Customer Testimonials

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Dustin Centofanti
Bellwether did a James Hardie siding installation. From helping figure out design to communicating on pre-job walk through to getting the job done they did excellent. Their crews have a great eye and attention for detail. You can tell they install the siding to manufacturer specification and take pride in their work. Finally I found the project manager to really care about customer satisfaction - they made sure to take care of final little details to make sure the job was fully complete and done... Read more
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Andrew Cohen
Bellwether was great about helping us evaluate options for a siding replacement and listening to our preferences on a desired product. Install went great and the project manager kept us updated with photos and texts throughout, and provided detailed answers to questions.
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Rich Torres
I was recommended to Bellwether from my family because I was impressed about the quality of Bellwether's work. Fast forward 6 months later, and Bellwether did my house.. From start to finish, I wouldn't have it any other way. Travis Towers with Bellwether was so awesome, professional, and all around a friendly person. Karen in financing works with you financially from beginning to end. Bellwether's prices are are so great, I ended up getting the fiber cement siding. Project manager Dylan and ... Read more
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Ronald Akau
We were impressed with the Bellwether team. Seth was professional, understanding, and listened to our design questions and concerns. Dylan, Angel and the sixteen man crew met our goals and finished the siding in three days. The entire project schedule, from siding to gutter install, was executed as promised. We appreciate and believe the Bellwether process and highly recommend this family owned company!
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Megan Biller
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.