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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Eric Scott
Cash with CSR was amazing! He explained the entire process & developed an incredible design for my home. The CSR crew was absolutely amazing, working so hard to make my home the best looking house on the block! From start to finish working with CSR was an easy & smooth process. I highly recommend CSR for any job!
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Chris Maria
Cash was here today to look at some loose siding. He recommended that it be taken off because there was custom wood siding underneath. He stayed and removed the siding for me. I am very pleased with Cash and his honesty and willingness to stay and get the job done same day. Thanks again Cash!
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Joseph Teh
Fast response to request. Repair was done promptly and very well. Good summary of the work was provided via photos and video. Highly recommend!
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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