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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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

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

Installing new siding can significantly enhance the appearance and durability of a home. Here in Evergreen, CO, our team at Bellwether Windows, Siding, & Doors is skilled at providing top-notch siding services to protect properties from harsh weather. Our focus is always on delivering quality installations that add value and beauty to the client's home. By choosing us, customers benefit from a seamless process and end results that stand the test of time.

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 Project Map ItBellwether Windows, Siding, & Doors reviews on Facebook
Kristen Cudish — review for Bellwether Windows, Siding, & Doors
Kristen Cudish
Seth came to the house for our consultation I asked multiple times if they would be removing the old insulation he assured me they would which somehow didn't make it into the itemized list along with a window which is how they got the low bid...anyway the crew stripped my house down when I asked why they weren't taking the old insulation that the paper had stains.I noticed a lot of dirt and black spots they called the foreman he had them just rip the old insulations stained paper facing off then... Read more
Richard Wand — review for Bellwether Windows, Siding, & Doors
Richard Wand
When we decided to replace all of our home's windows, we talked to a number of window contractors at the annual home and garden show. We really liked the folks at Bellwether and decided they were who we wanted to do business with. They did not disappoint. From the sales and bidding process through the installation, Bellwether was nothing short of excellent in their performance. I've dealt with a lot of contractors over the years while my wife and I remodeled our large 1997 fixer-upper. Wind... Read more
Eric B — review for Bellwether Windows, Siding, & Doors
Eric B
The Bellwether team provided excellent services throughout the process of developing and carrying out our fire-resistant (James Hardie) siding project. Teri on the sales side was very responsive and happily answered all of our questions. Dennis and the installation team communicated the requirement of our project well and did an impeccable job with the installation. We didn't even find anything to put on a punch list after they were done. Karen was patient and flexible -- a pleasure to work with... Read more
Roxann Ingersoll — review for Bellwether Windows, Siding, & Doors
Roxann Ingersoll
Workmanship on the outside was good. Some of the inside boards were not aligned correctly. Also, communication with the company was not as good as when we had used them in the past. However, we would not hesitate to use Bellwether for future projects.
John L — review for Bellwether Windows, Siding, & Doors
John L
Just had Bellwether install James Hardi siding on my son’s house. They did an excellent job . The communication was very good. Everyone we dealt with was friendly knowledgeable and very helpful. The crew that came out to do the work did an excellent job and cleaned up the work site very well. We have hired many contractors over the years and this was one of the best that we have worked with. Do not hesitate to have them for your project..

Frequently Asked Questions

Denver homeowners choose us because we offer award-winning design and installation services, backed by decades of experience and numerous industry certifications. Our commitment to quality is reflected in our A+ BBB rating and our reputation as Colorado's #1 James Hardie siding installer.

We offer a comprehensive range of services in Denver, including siding installation, window replacements, and door installations. Our expert team is trained to provide high-quality craftsmanship that enhances your home's exterior.

Yes, we offer financing options to help Denver homeowners achieve their dream exterior renovations. Our flexible plans make it easier to invest in your home's future without breaking the bank.

We are deeply committed to the Denver community, providing high-quality exterior remodeling services that homeowners can trust. Our team is local, and we understand the unique needs of homes in this area, ensuring every project meets Colorado's specific climate challenges.

Bellwether stands out in the Denver market due to our award-winning designs, expert installations, and strong manufacturer partnerships, such as our status as a Pella Platinum Certified contractor. Our focus on quality and customer satisfaction sets us apart.