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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Jesse Granger
CSR worked out great! We were selling our house and the inspector noticed some warping in the siding. The sun damage put the deal at risk so we needed and expert opinion right away. CSR had someone come out for an assessment super quick and wrote up a full report assuring the buyer the damage was merely cosmetic. Saved us a bunch of trouble and time! Thanks, Colorado Siding Repair!
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Breezy Schaefer
Everything about this company was amazing. Exceptional service, high quality product and the finished project looks better than I imagined. Cash was extremely knowledgeable when it came to his products and him and his group were so responsive. They made scheduling quick and easy and the employees working on the project were on time and finished that day. There is no project too big or too small for them. I will definitely be using Colorado Siding Repair for my future home project needs.
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Erin McCloskey
What started as a daunting and what I thought was an urgent situation ended beautifully with the help of Cash, Paul, Miaque and the entire crew at CSR! My old vinyl siding was literally falling off my house. I received quotes from three different companies and chose to go with Cash and CSR—even though they weren’t the least expensive option—because Cash took the time to talk through everything with me and made sure I understood my options and how I ended up in the predicament I was in (do not pa... Read more
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KA Wolff, True Up LLC
Colorado Siding Repair is awesome. My home had defective steel siding from a previous property owner, that had been installed over old batten board siding. They did a great job removing and replacing it with new Hardie board. My home is beautiful now! Mike and his crew were professional, kind, dependable and did incredible quality work. Colorado Siding communicated well throughout the process and completed the job as agreed in the time frame agreed. Really a great experience.
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Michael Fischer
Colorado Siding Repair was great to work with on our siding project. I spoke to 5 different contractors, and Keith at CSR was the only representative who took the time to answer my questions in great detail. He also didn't expect a commitment on the very first day. He was very knowledgeable about the product and honest about different options for repairing or replacing the siding. On top of that, CSR was very competitive on price. The whole process from signing the contract and scheduling went s... Read more