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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Laine Greaves-Smith - 350 Old Hughesville Road , Black Hawk, CO, US
Bellwether did a great job putting James Hardie siding on my cabin near Black Hawk. The crew worked quickly and took care of any issues. There were some issues with material delivery, but the PM took care of them and made sure a solution was figured out. Great work! I'm glad I chose to work with them.
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Bruce LaBarr - 2138 Sunstone Drive , Fort Collins, CO, US
Bellwether Siding provided exceptional service. They replaced the siding on my home with impressive speed and maintained high-quality workmanship throughout the process. The team was courteous, and their follow-up was thorough, promptly addressing all minor concerns. I highly recommend them for any siding projects. Special thanks to David Dembiski for ensuring everything went smoothly.
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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
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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
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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.