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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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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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Dave Kleiber - 2288 Holly Court , Golden, CO, US
We live in Steamboat. We tried and tried to find a local contractor to re-insulate, instal new windows, and re-side our 120 year old mountain home. Couldn't get anyone locally to even return a phone call. My wife reached out to Bellwether and three days later we were meeting with their rep and planning our project. Within a month our remodel began. We were amazed by how quick, professional, and skilled the crews were. They tore off the old siding and insulation and removed the old windows... 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