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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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
  • HardiePlank Select Cedarmill Siding: Evening Blue
  • HardiePlank Select Cedarmill Siding: Night Gray
  • HardiePlank Select Cedarmill Siding: Mountain Sage
  • HardiePlank Select Cedarmill Siding: Timber Bark
  • HardiePlank Select Cedarmill Siding: Aged Pewter
  • HardiePlank Select Cedarmill Siding: Iron Gray
  • HardiePlank Select Cedarmill Siding: Cobblestone
  • HardiePlank Select Cedarmill Siding: Gray Slate
  • HardiePlank Select Cedarmill Siding: Arctic White
  • HardiePanel Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Light Mist
  • HardiePlank Select Cedarmill Siding: Khaki Brown
  • HardiePanel Select Cedarmill Siding: Cobblestone
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
151 West Sycamore Lane , Louisville, CO, US
  • HardiePlank Smooth Siding
  • HardiePanel Select Cedarmill Siding: Primed
  • Other Services
  • Other Services: Siding
  • HardiePlank Smooth Siding: Primed
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Aged Pewter
1029 North Garfield Avenue , Loveland, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Arctic White
  • Other Services
  • Other Services: Siding
  • HardiePlank Select Cedarmill Siding: Arctic White
5358 East Costilla Drive , Centennial, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Arctic White
  • Other Services
  • Other Services: Siding
  • HardiePlank Select Cedarmill Siding: Arctic White

Customer Testimonials

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Craig Richardson - 9371 South Alcosta Place , Littleton, CO, US
We had a great experience with Bellwether. They were competitive on pricing and very high-quality in installation. Couldn't be more pleased. And, when time came for the inevitable punch-list of issues in a big, complex project at the end, they stood behind their work, resolved the punch list to my complete satisfaction. That's what we call integrity and character. Hard to find sometimes in this world. I would use Bellwether again and recommend them to my closest friends. As we say in the N... Read more
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Rich Torres - 2402 South Eagle Way , Aurora, CO, US
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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Katie Wood - 1292 West Long Avenue , Littleton, CO, US
Overall, Bellwether is priced in the middle of the pack, they have quality workmanship and are incredibly fast. My siding was removed and replaced and painted in four days (compared to a neighbor's siding, where the other company took several weeks). It looks great! I had some issues with disorganized or missed communication, but after the project the owner sat down with me to discuss lessons learned so he could take that feedback forward. To me, that speaks to the companies dedication to qualit... Read more
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Jeanne Dassel - 1267 Stardust Circle , Castle Rock, CO, US
Bellwether and crew were superb. Materials and support arrived as scheduled. Project managers were checking in regularly. Adjustments were seamless. The whole project proceeded from start to finish as promised.
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Ed Hester - 3130 North Buttercup Circle , Frederick, CO, US
Had all of our siding replaced by Bellwether with James Hardie siding. They finished off the job by sealing and painting all eaves and trim work not replaced. Final product looks great. They had a few items to come back and complete and did so quickly and to our satisfaction. Great pricing, great communication. Would have given 5 starts but the installation crew did not do a good job of cleaning up everyday after they finished work. There was a dumpster literally in the driveway but our ... Read more