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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Jay Blue - 469 3rd Street , Severance, CO, US
Our experience with Bellweather and having new windows installed has been awesome! From first contact with Seth our Project Guide who helped us determine what kind of windows and pricing would best fit our needs and budget; to then working with the Project Manager Dylan who prepped us on what to expect, scheduled all of the work, and walked with us through the entire process; to the installation team and their lead Angel, all of whom were extremely good at their work, very kind, respectful, and... Read more
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Ronald Akau - 19880 East 53rd Avenue , Denver, CO, US
We were impressed with the Bellwether team. Seth was professional, understanding, and listened to our design questions and concerns. Dylan, Angel and the sixteen man crew met our goals and finished the siding in three days. The entire project schedule, from siding to gutter install, was executed as promised. We appreciate and believe the Bellwether process and highly recommend this family owned company!
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Brady Martin - 5395 Osceola Street , Denver, CO, US
CSR and the team there are great! They have completed a few projects for us ranging from small to large. Trustworthy, responsive, thorough, fair...what more could you want. We will definitely use them for any future projects.
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Andrew Cohen - 2861 West 21st Avenue , Denver, CO, US
Bellwether was great about helping us evaluate options for a siding replacement and listening to our preferences on a desired product. Install went great and the project manager kept us updated with photos and texts throughout, and provided detailed answers to questions.
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Michael Adkins - 13672 West Bates Avenue , Lakewood, CO, US
Awesome work by Colorado Siding Repair! Cash looked at my siding and gave me several different price options to work with my budget. I am selling my house and CSR moved me up in their schedule on short notice so I was able to stay on track to put my home on the market in early February.