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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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

8410 North 81st Street , Niwot, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Boothbay Blue
  • Other Services
  • Other Services: Siding
  • HardiePlank Select Cedarmill Siding: Boothbay Blue
  • HardiePanel Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Arctic White
West Highland Drive , Grand Junction, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Timber Bark
  • Other Services
  • Other Services: Siding
2981 East 163rd Place , Thornton, CO, US
    6824 Olympus Drive , Evergreen, CO, US
    • Other Services
    • Other Services: Siding
    6189 Nelson Street , Arvada, CO, US
    • Other Services
    • Other Services: Siding

    Customer Testimonials

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    Jackson Goodwin.
    Could not be happier with Chad’s service and quote. Arrived on time. Didn’t waste my time with marketing nonsense just got down to the quote. Didn’t end up going with them but it was absolutely worth considering and I would encourage anyone else to consider them too
    Reviewer photo
    James Crocker
    Amazing service. Amazing product. Highly recommend
    Reviewer photo
    James Lincoln
    The team was great! It was actually important and very much appreciated that the Pella rep came back to measure and double check the order before it was ordered.
    Reviewer photo
    Nick Lepak
    Overall great experience. We had the team replace the siding in our house and garage. The attention to detail and quality of construction were great. There were a few areas we didn’t like the design and the team was quick to offer up an alternative and make it come to life. Would recommend to others looking for a new siding. We will consider them for some old windows that also need to be replaced.
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    Jacqueline Vedra
    We had a great experience with Bellwether. They installed Hardie siding on our entire house and the project was well run with great communication from the team. Beautiful result. No complaints.