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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Peter T.
The best thing about Colorado Siding & Repair (unlike the other siding companies I had called before engaging them) is that they do partial replacement and repair in addition to full siding replacement. Other area companies will not do partial replacement/repair of damaged siding. This is a niche they have in this market. I basically needed only one and a half sides of my house's siding replaced. Despite a few minor scheduling hiccups along the way, my interactions with the conscientious Cash St... Read more
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Peter Petrick
Had an appointment they missed it okay no problem, had a second appointment missed it okay sure I'm a nice guy, had a third appointment okay this is becoming redundant, 4th appointment no show I'm done.. These guys now owe me a few hundred dollars in lost wages. Best of luck to those who make an attempt to work with these folks not worth my time.
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Rod Manzur
Great company to work with. Fair price and attention to detail. Josh, the owner, is reachable and great to work with. Manuel is a great carpenter and paint team very efficiant.