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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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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!!!
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Jerry Greer - 18295 East Nassau Drive , Aurora, CO, US
You installed new siding. Everything is good!!!! I really appreciate your company's professional and Christian ethics. It was a pleasure doing business with you!!!
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Ross Levin - 5033 Hillstone Lane , Evergreen, CO, US
Colorado Siding Repair replaced the cedar soffit and fascia with Hardy board on our entire house. The whole process from proposal, planning, prep, execution and cleanup all went smoothly. Communication was spectacular with both verbal and written explanations of what to expect leading up to the work and then texts and emails during the installation. Folks were accessible at all times for questions during the project. All the employees we interacted with showed a positive attitude and seemed ... Read more