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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Keegan Deignan
Cash and the rest of the crew did an incredible job with my recent siding repair and paint job. I would highly recommend them to anyone looking for professional and reliable siding work. They communicated through every step of the process, and made sure I was happy with the work that was completed.
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Anna Hamp
Cash, Paul, Katelyn, and the entire team at Colorado Siding Repair were professional, courteous, and responsive. Our most recent project was finished even faster than we had anticipated. Since we were on a tight budget, they worked with us to replace the siding on one side of the house at a time. We really appreciate their beautiful work (see before and after photos below) and can't wait to have them finish the last wall of our house soon.
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Carri Stern
I would give these guys 100 stars if I could! I am VERY, VERY picky about this kind of work being done on my house and I couldn't recommend them more highly! Cash was our sales rep and he never pressured me in any way. He presented all options to me equally and let me decide if I wanted to move forward and what level of siding to choose. One of our huge issues is that our 1970 house was roasting in the summer and freezing in the winter. He suggested that we put new insulation in as part of the p... Read more
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Erin Gardner
Cash and team did an amazing job transforming our 1973 original cedar siding to a quality Hardie product that we love. The team had to deal with all types of unusual things that come with original wood siding. Siding that has warped over the years and allowed things to live behind the boards such as bees and even BATS! CSR team took great care to work with us on all of our issues that came up. The crew worked hard during 90 plus degree weather and still managed to clean up their debris each day.... Read more
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Yukiko Tomonaga
We recently replaced our siding with CSR and highly recommend them, especially we would like to shout out for Steve! Steve was our sales person and so wonderful to work with. He was always available for our questions and super quick in response. He was patient when deciding colors and styles, he frequently came out to check on the progress once the installation started. He just went above and beyond to make sure we feel comfortable every steps of the way. So thank you Steve for everything! We co... Read more