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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Sheryl Clay - 16120 East Gunnison Place , Aurora, CO, US
Hire this company! I needed new siding, shutters, windows and paint. I scoured the Internet and got several quotes before going with Colorado Siding Repair, and I am glad I went with CSR. The whole team was polite, knowledgeable and professional. I kept waiting for that inevitable letdown that I have experienced with so many contractors, but it never came. They have a high level of skill and competence and do great work using quality materials. In the beginning, I felt overwhelmed taking on such... Read more
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Randy Glassman - 7022 South Eudora Street , Centennial, CO, US
We had a great experience from initial conversation through sales to production completion. We replaced all windows and full hole siding. Most impressive was their crew's working timeline and respect of my property during construction. I highly recommend Colorado Siding Repair.
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Omar Contreras - 6354 South Hanover Court , Englewood, CO, US
Siding replacement was executed on time, on budget, a very professional work. Communication with company was excellent. Any additional charges were properly discussed and documented, so no surprises. Installation crew was phenomenal. Detail oriented and responsive, clean, organized and hardworking crew. Very happy with the results.
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Ro Mistry - 1101 Conifer Court , Littleton, CO, US
Colorado Siding Repair, now Bellwether replaced our old siding with Hardie Plank and also added a couple of new windows we wanted, where many others were not able to. Excellent job overall. Was all done virtually as well before our moving in showing us detailed pictures of the work they did and they also took care of some minor issues we brought up once we were there.
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Jeanetha Wemken - 4922 Silver Spruce Lane , Evergreen, CO, US
This crew were so professional and tidy and respectful of my home as they installed all new windows. And refinished the trim. Great experience!!!