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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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

1555 West Thomas Avenue , Englewood, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Boothbay Blue
  • Other Services
  • Other Services: Siding
  • HardiePlank Select Cedarmill Siding: Boothbay Blue
199 County Road 8038 , Fraser, CO, US
  • HardiePanel Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Rich Espresso
  • Other Services
  • Other Services: Siding
  • HardiePanel Select Cedarmill Siding: Rich Espresso
1555 West Thomas Avenue , Englewood, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Aged Pewter
  • Other Services
  • Other Services: Siding
1555 West Thomas Avenue , Englewood, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Timber Bark
  • Other Services
  • Other Services: Siding
1555 West Thomas Avenue , Englewood, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Timber Bark
  • Other Services
  • Other Services: Siding

Customer Testimonials

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Lauran
Bellwether replaced our 100 year old shingle siding with James Hardy, paying great attention to the detail of our home. From our sales person, Tom, to our installer, Alejandro, the communication and professionalism was top notch. Install went well even with weather delays. Painting was the final phase of the project and communication broke down a bit as Bellwether contracts out for their paint jobs. However, when mistakes were made, Bellwether was quick to address and fix them. If you have a si... Read more
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Jordyn
Had to get a siding repair done for one of the homeowners my company works with doing Solar and this company was great to work with! They were able to keep myself and homeowner up to date with when the project was starting and was done to satisfaction. Karen with accounting was very helpful when it came to payment as well
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Scott Lawson
CO Siding did a great job replacing the siding on our house! Completely PRO throughout the whole process from sales to completion. On time and on budget. Communication throughout was perfect too. I highly recommend them and I’ll use them again without hesitation.
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Melisha Westbrook
We had a wonderful experience with Colorado Siding Repair. We had new siding installed and exterior painting done. They were professional and the crews cleaned up before they left every day. The communication from the entire team was excellent and they followed through with every scheduled date. Once project was complete we were so pleased with the finished product!
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Alison Levernier
Replaced my siding