The most experienced and professional people in Colorado
Alejandro Borja
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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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:
- Siding
- Windows
- Multifamily Siding Replacement
- Stucco Removal
- Insulation
- Decks
- Roofs
- Remote Sales Estimates
- Bellwether Referral Rewards+
- Exterior Design
- Free Online Quote
- Financing
- Blog
- FAQs
- About Us
- Contact
Read what 190+ clients have said about our services:
Our Work
355 East 112th Drive , Northglenn, CO, US
- HardiePlank Select Cedarmill Siding
- HardiePlank Select Cedarmill Siding: Trad Red
- Other Services
- Other Services: Siding
274 Washington Street , Golden, CO, US
- HardiePlank Select Cedarmill Siding
- HardiePlank Select Cedarmill Siding: Monterey Taupe
- Other Services
- Other Services: Siding
10238 Andee Way , Littleton, CO, US
- HardiePlank Select Cedarmill Siding
- HardiePanel Select Cedarmill Siding: Primed
- Other Services
- Other Services: Siding
Harlan Street , Westminster, CO, US
- Norandex Woodsman Select Siding
- Norandex Woodsman Select Siding: Olive
- Other Services
- Other Services: Siding
3370 South Marion Street , Englewood, CO, US
- HardiePlank Select Cedarmill Siding
- HardiePanel Select Cedarmill Siding: Boothbay Blue
- Other Services
- Other Services: Siding
Customer Testimonials
Bellwether did a great job putting James Hardie siding on my cabin near Black Hawk. The crew worked quickly and took care of any issues. There were some issues with material delivery, but the PM took care of them and made sure a solution was figured out. Great work! I'm glad I chose to work with them.
Awesome staff super friendly helpful
We hired Bellwether to replace some old pine wood siding. They did an excellent job. Lee and Julio stood out as 2 employees that went above and beyond. They were very professional and a pleasure to work with.
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