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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Martha Smith - 6367 South Ingalls Street , Littleton, CO, US
Cash and his team were great to work with. They were efficient and very responsive when I had questions. They replaces my original 1970's siding with Hardie Boy and I love the results. They were also very understanding as I waited for my HELOC to close. Goodbye barn red, hello modern grey that will last a lifetime!
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Casey Story - 6117 South Westview Street , Littleton, CO, US
I have nothing but positive things to say about our partnership with Cash, Paul, and the entire Bellwether/Colorado Siding Repair team. When we began the vendor evaluation process for the complete residing of our 1950's MCM home, we had a very particular idea of what we were hoping to achieve as an outcome. After sitting on the receiving end of multi-hour, in home sales presentations, including hard line negotiating and closing tactics from from 4-5 other vendors, we had all but given up on fi... Read more
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Andrea Lively - 3962 South Bannock Street , Englewood, CO, US
The best experience! I work in construction and am sad to say that most folks these days do not take any ownership, pride or responsibility. This was our experience when the contractor we had been working with on our major kitchen remodel decided he had not budgeted enough for the siding repair and didn't have anyone lined up so he just wasn't going to finish what we had contracted him to do. This left gaping holes in the side of our home and now was up to us to figure it out. We met with everyo... Read more
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Jen Ross - 32172 Lodgepole Drive , Evergreen, CO, US
We had our siding, soffits, fascia, and windows replaced by Bellwether and we could not be happier with the work or the customer service. The pricing was very comparable to other estimates we received, they outlined the process and even came out ahead of schedule. We were due to get a snowstorm when scheduled, and rather than cancel, they sent out two crews, over 15 people, to get the job done in a couple of days. I also very much appreciated the help with the design. Our house doesn't have much... Read more
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Estelle Kew Hoehl - 6620 South Billings Way , Centennial, CO, US
After several siding quotes, I chose to work with Colorado Siding repair for full exterior James Harding replacement. I know not to go with the cheapest quote out there and play games with me later. CSR Josh, Cash, Keith were helpful, honest, reasonable and had great crew and after sales service. We are happy with their siding job. There are some punch list items to fix after the job but I will highly recommend this to my friends. This is not a paid review like what other shady companies try to ... Read more