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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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

355 East 112th Drive , Northglenn, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Trad Red
  • Other Services
  • Other Services: Siding
274 Washington Street , Golden, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Monterey Taupe
  • Other Services
  • Other Services: Siding
10238 Andee Way , Littleton, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Primed
  • Other Services
  • Other Services: Siding
Harlan Street , Westminster, CO, US
  • Norandex Woodsman Select Siding
  • Norandex Woodsman Select Siding: Olive
  • Other Services
  • Other Services: Siding
3370 South Marion Street , Englewood, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Boothbay Blue
  • Other Services
  • Other Services: Siding

Customer Testimonials

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Jen Ross
We had our siding, soffits, fascia, and windows replaced by Bellwether and we could not be happier with the work or the customer service. The pricing was very comparable to other estimates we received, they outlined the process and even came out ahead of schedule. We were due to get a snowstorm when scheduled, and rather than cancel, they sent out two crews, over 15 people, to get the job done in a couple of days. I also very much appreciated the help with the design. Our house doesn't have much... Read more
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Jay Blue
Our experience with Bellweather and having new windows installed has been awesome! From first contact with Seth our Project Guide who helped us determine what kind of windows and pricing would best fit our needs and budget; to then working with the Project Manager Dylan who prepped us on what to expect, scheduled all of the work, and walked with us through the entire process; to the installation team and their lead Angel, all of whom were extremely good at their work, very kind, respectful, and... Read more
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Monica Smith
I had an excellent experience working with Bellwether! From the initial consultation with Seth to the final walkthrough with Dylan. The team was professional and efficient. The quality of their work exceeded my expectations, and they made sure to keep me informed throughout the entire process. The project was completed on time and within my budget, which I truly appreciated. I highly recommend Bellwether for anyone looking for reliable, high-quality window replacement, painting and construction... 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.