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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Ryan McAnally - 10181 Briargrove Way , Littleton, CO, US
Colorado Siding Repair is a rare company to find. Their willingness to get the job done right and continue to strive for complete customer satisfaction is unlike anything I have encountered in the construction industry. Cash and Paul are terrific human beings guided by their integrity and honesty. Despite several set-backs, they showed every day and always made sure we knew they were going to do everything they could to make us satisfied.
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Rick Hanni - 15120 East Greenwood Place , Aurora, CO, US
"They did not fall short in any way. The crew that they sent out, I think Cash was the salesperson--he had four or five crews--the crews they sent out to my house were great. They were organized, friendly, and professional. I couldn't have asked for anything more-- completely top notch. In fact, I made sure to put their business card in a safe place b/c I'm going to have some additional repairs on siding, and they're going to do the work.
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Fallon Hanley - 2234 Garfield Avenue , Louisville, CO, US
Very professional and executed the work quickly And efficiently. I’d recommend this group to anyone I know.
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Robert Klamser - 9257 East 35th Avenue , Denver, CO, US
Cash and his team at CSR definitely care about their work. The staff regularly followed up on the status of my siding replacement, including walking me through the entire process, step by step. The finished product is stunning, which was shocking because it is siding... how boring is that. Three of our neighbors have already reached out to us for a recommendation based on how our house turned out.
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Samantha Sclafani - 1458 Glencoe Street , Denver, CO, US
The whole Colorado Siding Repair team is fantastic. I had requested a quote for some siding repair on a garage and paint - a representative showed up the same day to review the site and work, provided a quote exactly when he said that he would, and arrived to complete the work when scheduled. The on-site team was professional, courteous and very detail oriented. The garage turned out beautifully. I really appreciated the white glove service I received - the project was completed exactly to my sp... Read more