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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Alex Lehr
Hands down will be using this company again! Cash (the Co-Founder) came out to evaluate the north side of our home, and with some simple explanations, he saved me over $9,600 by doing it myself! (Most companies will charge you to replace the whole side instead of the couple of pieces that might be broken) Not every situation will be like this, but the time Cash spent walking me through the project was something I haven’t seen from a company in a long time! Thanks again, Colorado siding Repair, a... Read more
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CL Google
We used Colorado Siding Repair to replace the siding on our home. We went with the James Hardie ColorPlus siding and had the entire house done. Siding, trim, fascia, soffits, etc. The house looks absolutely amazing now. It really modernized our almost 45-year old house. People continue to stop and comment on how good the house looks, and ask us who did the installation. The CSR crew did such great work. Honestly, they did much more than I ever expected them to do. And certainly the quality is be... Read more
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Jim Davis
Course was in great shape.
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A W
CO Siding replaced my siding and painted. They did an excellent job. Cash is very thoughtful and detail oriented and it shows in the end result. We are thrilled with how the project came out.
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Cole Carosella
Everyone at Colorado Siding was great from the field team of Cash and his crew to the office of Kari and Karen, we had a great experience with Colorado Siding and would highly recommend. They are very transparent, communication is great, and they are available and responsive. The finished product looks great. 5/5 stars earned.