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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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
  • HardiePlank Select Cedarmill Siding: Evening Blue
  • HardiePlank Select Cedarmill Siding: Night Gray
  • HardiePlank Select Cedarmill Siding: Mountain Sage
  • HardiePlank Select Cedarmill Siding: Timber Bark
  • HardiePlank Select Cedarmill Siding: Aged Pewter
  • HardiePlank Select Cedarmill Siding: Iron Gray
  • HardiePlank Select Cedarmill Siding: Cobblestone
  • HardiePlank Select Cedarmill Siding: Gray Slate
  • HardiePlank Select Cedarmill Siding: Arctic White
  • HardiePanel Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Light Mist
  • HardiePlank Select Cedarmill Siding: Khaki Brown
  • HardiePanel Select Cedarmill Siding: Cobblestone
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
151 West Sycamore Lane , Louisville, CO, US
  • HardiePlank Smooth Siding
  • HardiePanel Select Cedarmill Siding: Primed
  • Other Services
  • Other Services: Siding
  • HardiePlank Smooth Siding: Primed
  • HardiePlank Select Cedarmill Siding
  • HardiePlank Select Cedarmill Siding: Aged Pewter
1029 North Garfield Avenue , Loveland, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Arctic White
  • Other Services
  • Other Services: Siding
  • HardiePlank Select Cedarmill Siding: Arctic White
5358 East Costilla Drive , Centennial, CO, US
  • HardiePlank Select Cedarmill Siding
  • HardiePanel Select Cedarmill Siding: Arctic White
  • Other Services
  • Other Services: Siding
  • HardiePlank Select Cedarmill Siding: Arctic White

Customer Testimonials

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Tom Robesky
I had several companies come out to provide an estimate to repair/replace the siding on the north side of my house. They were the only ones that offered an all in one solution. Most of the others didn't include painting or actually fixing the root cause of my problem (my windows didn't have flashing). My repair was started within a week (much sooner than I expected) and finished in only 3 days and it looks amazing!! I couldn't be happier with my choice. I would definitely recommend them to ... Read more
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Jay Krause
My family purchased a home in January. The inspection unveiled a problem with the siding. We've owned two brick homes in the past and this was our first time dealing with siding and was concerned how this might impact our new home. We reached out to Colorado Siding Repair and were put in great hands with Josh. He met us at our new home the next day and explained what our project would entail and the process to accomplish. Attention to quality is important to us and fixing the problem correctly t... Read more
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Julie May
I contacted Colorado Siding Repair knowing we would need a full replacement. Cash was so helpful, he spent 2 hours with us during our initial meeting at our home. He gave us great ideas and really listened to our concerns. What began as a necessary project, turned into an exciting transformation. We LOVE how our house turned out and are still shocked at how good it looks now! Everyone at Colorado siding repair was great to work with. Katelyn was responsive and extremely helpful, the crews ... Read more
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Office Account
Colorado Siding Repair has been our go to siding company when our customers need work done. Customer service is top priority for us and we’ve been able to fully entrust our clients to CSR on big projects to small repairs. We will continue to send work their way and you should too! - TSV Construction and Roofing, Inc.
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Michael Regier
Josh is awesome. He is nice and very helpful.