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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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

West 8th Avenue , Denver, CO, US
  • Other Services
  • Other Services: Windows
  • Other Services: Doors
315 Morgan Drive , Loveland, CO, US
  • Other Services
  • Other Services: Windows
  • Other Services: Doors
3424 Wabash Street , Denver, CO, US
  • Other Services
  • Other Services: Windows
  • Other Services: Doors
400 South Steele Street , Denver, CO, US
  • Other Services
  • Other Services: Windows
  • Other Services: Doors
32834 Snowshoe Road , Evergreen, CO, US
  • Other Services
  • Other Services: Windows
  • Other Services: Doors

Customer Testimonials

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Kelly Toney
We could not have had a better experience with Bellwether. They were professional, on time, delivered a beautiful quality product, and met all of our expectations. The ease of their process was a breath of fresh air. We completely re-sided the outside of our house from old mountain cedar siding to gorgeous James Hardie board and batten fiber-cement siding. They also handled replacement of all of the 40 year old windows in the house. It was a big job handled like clock-work. We had nothing but co... Read more
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Yorolyn
We had our windows and doors replaced. They did an amazing job!
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Jeanetha Wemken
This crew were so professional and tidy and respectful of my home as they installed all new windows. And refinished the trim. Great experience!!!
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Joe Murray
Project was installation of Hardie Board on cabin and detached garage near Cripple Creek. Hand holding through process of selecting colors was beyond expectations. Communications before, during and after were excellent. Neighbors are impressed. Highly recommend Bellwether.
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Brad Carter
Bellwether was a delight to work with starting with Cash Stricker. One of the original owners, actually has installed the Hardie Board Product. He could answer all my questions and provided an accurate, easy to understand estimate. The installers, Mario and Heberto worked with care and patience like they were working on their own home. All building codes for building wrap, rafter framing and flashing designs were followed ( I asked lots of questions during the renovation). The Painters and G... Read more