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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Christine Perez - 28525 Tepees Way , Evergreen, CO, US
We used Colorado Siding and Repair for a very complicated exterior siding removal and replacement. Their staff was very responsive and answered all of our questions before, during and after the project. Their installers were on time every day, worked extremely hard throughout the project and did an excellent job. We had just moved into the house and this was a very stressful project for us. Colorado Siding was extremely helpful and competent in explaining the process and timelines and re... Read more
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George Anderson - 993 West 124th Drive , Westminster, CO, US
Were very flexible and professional in replacing my siding to new code and painting it our desired colors plus the team were very hardworking and diligent to produce a great fit, finish and result. Highly recommended.
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Jeremy Ervin - 3640 Magnolia Street , Denver, CO, US
Colorado Siding Repair installed new siding on the gables of our house and re-painted the gables, eaves, gutters, downspouts and both porches of our house. Cash Stricker (co-owner) worked with us throughout the process, and made sure to address every detail. They were very attentive to our needs, and took care of everything.
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Peggy Cook - 5735 Dover Street , Arvada, CO, US
I contracted with Bellwether to install new siding on my home. Every employee that I spoke with was helpful and professional, but especially the crew that installed the new siding. They transformed the exterior of my home that now has some curb appeal. My neighbors all commented on how much they liked the new look. Peggy C.
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Kelly McDowell - 10082 Zenobia Court , Westminster, CO, US
I called CO Siding more than a year ago to get ideas on how to tackle my siding and soffit project. My house had updated siding on the front, but had open soffits and old vinyl siding on 3 sides of the house that needed updating and soffits that needed to be enclosed. Cash, one of the owners, came out and really gave me a lot of options on what I could do and how they could work with me in phases, due to my very limited budget. I was very impressed given no other companies provided me options. I... Read more