Take a look at our past work!

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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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


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

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Andy Edwards
We had a great experience. We had our siding replaced. They had a huge crew and it was completed in 3 days! My wife and I were shocked how fast they went, they were working hard to get it done before a cold front came in. The crew was great, cleaned up, and got the dumpster out quickly. Having your siding replaced is very loud, so I would recommend planning to be out of the house for the first 2 days (or get some good ear plugs!) Great experience, good pricing, great project manager and crews... Read more
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Kooper Stringer
We recently got new windows and siding and absolutely love the outcome! The crew that came out was so fast and very nice/respectful!
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Dan Rowe
My project was very unique. I only needed to replace my gables and side a shed to match. I had 5 different quotes and Bellwether was the only reasonable one that was eager to do the job. I couldn't be happier with how it came out. It was such a small 4-day project and they worked outside of their comfort zone on my unique shed situation (4 doors and swing-in window). Thank you so much for doing the great work at a reasonable price!
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Nate Reed
Josh and Tanisha run a tight ship. I’m pleased with their ability to get our project completed on budget and on schedule. We had a huge 18 unit siding replace of our townhomes and they were better than I could have expected. Trusting these guys was a great choice. Will do my work again and highly recommended!!
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Bruce LaBarr
Bellwether Siding provided exceptional service. They replaced the siding on my home with impressive speed and maintained high-quality workmanship throughout the process. The team was courteous, and their follow-up was thorough, promptly addressing all minor concerns. I highly recommend them for any siding projects. Special thanks to David Dembiski for ensuring everything went smoothly.