Steve Dennis and his team at Bellwether did an amazing job replacing the siding on my entire house. They were fast, efficient and thorough. I highly recommend Bellwether to anyone needing siding work.
Tyra Vickers
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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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
We installed a new Sierra Pacific door and 3 Pelle windows in our Lennar house in the northend area. The process took around 3 months and we're super pleased with the quality and care towards making our vision into a beautiful reality. The design process was super smooth and gave us a lot of ideas to work with while considering the structural integrity and resell value. The actual work days where the house was in a mess was less than 6 days, but scheduling and holidays was a factor in making sur... Read more
Beautiful work! Great Service! I even had one issue with the paint and they came right out to my house to fix it in the same week! I Love how the new siding looks and Bellwether was great to work with.
I had a great experience with Bellwether for replacing all the siding on my home in November 2023. It was a major project, that came together beautifully! I’m so pleased with the final product, the excellent service I received, the attention to detail and getting the project done right on schedule. I especially appreciated Paul as my project manager-he was SO responsive anytime I texted him a question. There were a couple of minor hiccups in the process, but Paul addressed them very quickly,... Read more
We were extremely pleased with our experience with Bellwether! From our salesman, Steve Dennis, to the front office personnel,Paul,Tanisha,and Karen, to the installers. They were all exceptionally knowledgeable, friendly and professional. They assisted with our dealings with insurance, project timing, and completion steps. Everyone was friendly and willing to work around our needs and schedule. As the City inspector left, he said "They did a great job for you." We can't agree more! Thanks... Read more