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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Patty Sible - 611 Elizabeth Avenue , Platteville, CO, US
I highly recommend Colorado Siding Repair for their high quality product, quick responsiveness, very competitive pricing & top notch professional staff. When I contacted Colorado Siding Repair, David promptly visited our home to review the siding work that was needed. He explained in detail the reason we were seeing our siding issues & offered some advice to prevent these issues going forward. When sending the quote he offered two options, instead of telling us we needed to replace the siding on... Read more
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Peter Hopkins - 2473 Briarwood Drive , Boulder, CO, US
Colorado Siding Repair replaced the siding on our entire house with James Harding siding and did a fantastic job. Stephen worked with us through the whole process to plan the project and configure the job the way we wanted; the computer-assisted drawings really helped us make some important decisions and be confident that we would be happy with the outcome. Everyone was so professional, competent and friendly. Thank you CSR!
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Jim Boyd - 1371 Copper Hill Road , Glen Haven, CO, US
They did a nice job installing our new James Hardy siding. It looks great and we are very pleased with their service.
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Bryan Dickinson - 2440 Outlook Trail , Broomfield, CO, US
I had talked to several former customers before deciding to hire Colorado Siding Repair, so I was confident they would do a good job. But they exceeded even my most optimistic hopes. From start to finish, in all aspects, this project was executed professionally. Tom was a very helpful and patient salesman. He never pressured us or used "hard" sales tactics. He answered our questions honestly and worked with us to keep the project within our budget. He positively influenced our color and style ch... Read more
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Ken Grimes - 4418 South Taft Court , Morrison, CO, US
CSR installed all new siding on our home, and they did a fantastic job! The work crews were very thoughtful and professional with their workspace and cleanup. The office staff was friendly and easy to work with as well. We are very happy with this contractor and with the new siding job on our house--highly recommended!