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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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
David Lavigne — review for Bellwether Windows, Siding, & Doors
David Lavigne - 4495 Wellington Road , Boulder, CO, US
I have used CSR on three separate properties over the last year and have had great results! Their quality of work, communication, and follow-up by Cash and Paul and other CSR employees exceeded my expectations. Cash and Paul always made sure that the work was done properly and followed up with Covid based supply chain difficulties. I would definitely recommend them for any of the work that is listed below, and will use them again on other properties. Property one had a full exterior siding r... Read more
Amanda Andrew — review for Bellwether Windows, Siding, & Doors
Amanda Andrew - 6907 West Roxbury Avenue , Littleton, CO, US
They just finished our job and I’m completely satisfied. They did new windows, James Hardie siding, gutters and fixed our roof over the porch. Their crew was incredible. Hard working, extreme attention to detail, easy to work with and nice to my kids. I’m so impressed. Our house looks beautiful and is water tight!
Jessica Salazar — review for Bellwether Windows, Siding, & Doors
Jessica Salazar - Himalaya Court , Denver, CO, US
Bellwether did an excellent job replacing the siding on our home with the James Hardie siding, from the beginning of the project to finish everyone was great. Cash the salesperson was very polite and explained the how the process works,Lee came out prior to installation to let us know exactly what would be done during installation. Cole the project manager kept everything running smooth and kept me updated on the progress of the project. Angel the insallation crew leader was vey polite and made... Read more
Brad Carter — review for Bellwether Windows, Siding, & Doors
Brad Carter - 1193 South Dudley Street , Lakewood, CO, US
Bellwether was a delight to work with starting with Cash Stricker. One of the original owners, actually has installed the Hardie Board Product. He could answer all my questions and provided an accurate, easy to understand estimate. The installers, Mario and Heberto worked with care and patience like they were working on their own home. All building codes for building wrap, rafter framing and flashing designs were followed ( I asked lots of questions during the renovation). The Painters and G... Read more
Janet Garner — review for Bellwether Windows, Siding, & Doors
Janet Garner - 9275 West 8th Avenue , Lakewood, CO, US
A few years ago we had siding put on and Bellwether was great so naturally when we needed to update some doors and put in a French door, we called on them again. *Amy was great from start to finish making sure we were up to date on planning and getting everything we needed. *Cole was great to work with throughout the whole process and really gave us a personal touch and made sure we got what we wanted. *Luis and his crew made sure we knew about issues they ran into and worked hard to fix everyth... Read more