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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Sherri Veneziano
This was a huge project and I am so thankful we hired Bellwether! From the very beginning, my first phone call with Amy to schedule someone to come out to give us an estimate, which in itself was amazing because the house was all brick and no other company even wanted to come out and give us an estimate for siding until the brick was completely removed. I spoke with Amy and she said, no problem, we can come out right away...yea!! Then we met with Seth and he gave us an amazing estimate for th... Read more
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Joyce Schilling
Very talented crew with a impressive work ethic. Errors were caught early and quickly corrected. Very professional crew that worked together seamlessly. We ate happy with the new look. We would recommend Bellweather, in fact we are already telling our neighbors.
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B May
We recently had new siding installed on our home by Bellwether, and the entire experience was outstanding from start to finish. Our sales rep, Seth Blue, did an excellent job understanding our goals and helping us choose the right siding to fit both our vision and budget. Dylan Harden, our Project Manager, made sure everything ran smoothly and kept us informed throughout the process. His crew lead, Julio, and the rest of the team worked with incredible attention to detail and took the time neces... Read more
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Wendy Bennington
Everyone was so nice and personable. Dylan was a great project manager and communicated well. We love our new Hardie board siding and the look of our house.
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Chris A.
Could not be happier with this company. Mike Sipes was incredibly patient and helpful, Cole did a fantastic job as managing everything, as did everyone in the office. And the windows and siding all look fantastic. We constantly get compliments from people passing by. Would 100% recommend.