Working with this company has been wonderful - from the sales person Terri (amazing and delightful) - to the team that showed up and measured and communication on windows arriving to installation - Great job!
Leslie Petty
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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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Siding Installation
As a James Hardie Alliance Elite certified contractor and one of Denver's most trusted siding specialists, we install fiber cement, wood, composite, vinyl, and metal siding across the full Front Range of Colorado, with a pre-construction meeting unique to Bellwether that gives you a clear and detailed scope before a single panel goes up, backed by a 30-year product warranty, 15-year finish warranty, and a 100% satisfaction walkthrough at the end of every project.
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Window Replacement
We install full-frame replacement windows across Denver and the broader Colorado market using vinyl, composite, fiberglass, and wood-clad options selected for Colorado's altitude, UV intensity, and rapid temperature changes, with double-pane low-E coated glass as our standard recommendation and triple-pane available for noise reduction in high-traffic areas, all installed by long-time Colorado residents who understand how the climate affects both windows and the siding around them.
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Multifamily Siding Replacement
We specialize in large-scale multifamily siding replacement across Colorado, managing everything from local approvals and color coordination across units to new sheathing, weather barriers, and full installation, using durable materials built for Colorado's climate and backed by a 30-year product warranty and 15-year finish warranty, with 3D and HD renderings available so HOA boards and property owners can visualize the transformation before a single panel goes up.
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2981 East 163rd Place ,Thornton, CO, US
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.
- Other Services
- Other Services: Siding
Customer Reviews
See what our customers are saying — click any logo to read our reviews on that platform.
Lauren, Karen, Cole and the entire gang worked with me from start to finish to make sure every detail came out just the way I wanted. I highly recommend Bellwether: they will take care of you and your project.
Awesome company to work with. They helped ensure I got the custom look I wanted with hardie board. Our house looks incredible and we’re getting compliments from all the neighbors. The crew was meticulously, professional and fast and they left the work site very clean. Highly recommend Bellewether!
Great job! Huge thank you for the whole crew. Dave is a great and knowledgeable salesman, Cole our project manager was super responsive, Amy the designer came up with amazing colors and we are very satisfied, Karen the accountant is always in contact and never misses a message. Everything was very neat and organized. Everyone was very pleasant to work with. Thank you, Bellwether! I would recommend you to anyone who asks.
Customer Service is Unbelievable. Let’s just say my job had challenges and Paul, Cole, and Karen didn’t give up until it was all done to my satisfaction. I just noticed, somehow one side of one window didn’t get caulked, I shared a picture with Cole (over a year after the initial completion) and he came out immediately and addressed the problem!
Over the top customer service is something most companies have forgot, but bellwether knows how to treat its customers!
I will plan to use bellwether... Read more
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.