Bellwether Windows, Siding, & Doors of Colorado

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About Us

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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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


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Read what 190+ clients have said about our services:

Recent Work

2981 East 163rd Place,Thornton, CO, US

2981 East 163rd Place , Thornton, CO, US
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6824 Olympus Drive,Evergreen, CO, US

6824 Olympus Drive , Evergreen, CO, US
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  • Other Services
  • Other Services: Siding

Customer Reviews

See what our customers are saying — click any logo to read our reviews on that platform.

Bellwether Windows, Siding, & Doors reviews on GoogleBellwether Windows, Siding, & Doors reviews on Project Map It
Jeremy Ervin — review for Bellwether Windows, Siding, & Doors
Jeremy Ervin - 3640 Magnolia Street , Denver, CO, US
Colorado Siding Repair installed new siding on the gables of our house and re-painted the gables, eaves, gutters, downspouts and both porches of our house. Cash Stricker (co-owner) worked with us throughout the process, and made sure to address every detail. They were very attentive to our needs, and took care of everything.
Peggy Cook — review for Bellwether Windows, Siding, & Doors
Peggy Cook - 5735 Dover Street , Arvada, CO, US
I contracted with Bellwether to install new siding on my home. Every employee that I spoke with was helpful and professional, but especially the crew that installed the new siding. They transformed the exterior of my home that now has some curb appeal. My neighbors all commented on how much they liked the new look. Peggy C.
Kelly McDowell — review for Bellwether Windows, Siding, & Doors
Kelly McDowell - 10082 Zenobia Court , Westminster, CO, US
I called CO Siding more than a year ago to get ideas on how to tackle my siding and soffit project. My house had updated siding on the front, but had open soffits and old vinyl siding on 3 sides of the house that needed updating and soffits that needed to be enclosed. Cash, one of the owners, came out and really gave me a lot of options on what I could do and how they could work with me in phases, due to my very limited budget. I was very impressed given no other companies provided me options. I... Read more
Fran Dong — review for Bellwether Windows, Siding, & Doors
Fran Dong - 681 Saint Andrews Lane , Louisville, CO, US
Colorado Siding Repair replaced our old siding with JamesHardie sidings/trim. Great experience working with them. Excellent job overall. We are very pleased that we chose them over three or four other bids. The results were excellent and would not hesitate to use them for any other services they provide. They also took care of some minor issues we brought up once we were there. I would highly recommend if you want new siding.
Luke Meyer — review for Bellwether Windows, Siding, & Doors
Luke Meyer - 9165 Bell Flower Way , Littleton, CO, US
The project went smooth from start to finish. They started exactly when expected and ended when as they said. They did a good clean job. Our house looks so good now. The rates were very competitive and I believe we got a great deal! I am getting compliments all the time. It was money well spent. You can't go wrong with this company !