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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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

Reviewer photo
Karen MacDonald
To update our 75 year old house, we wanted new siding accent walls, a new window, and paint. We have worked with many contractors for renovation and landscaping, so we know how quickly things can go wrong. We were therefore *very impressed* with Colorado Siding Repair, from the initial bid process, through the design, delivery, and final result. They are very professional, personable, and skilled. The crew who did the work showed up on time, paid attention to details, did great work, and were ha... Read more
Reviewer photo
M Martinez
The 1 star is not for the actual quality of work - I have no idea the quality. They sent a sales person out. He said he would have a quote by the that weekend. Several weekends have passed and no quote. I called and emailed the sales person and copied the person who coordinated the visit. No response. Not only is this incredibly unprofessional but absolutely rude. How hard is it to hit reply? If they don't have time to do the work or do not want the work then say so. Neither was indicated by the... Read more
Reviewer photo
Ken Mcleish
Removed our swamp cooler on side of the house. Put in new siding which matched our old siding exactly and painted it. Can't tell the hole for cooler was ever there. Did a fantastic job!
Reviewer photo
Jesse Granger
CSR worked out great! We were selling our house and the inspector noticed some warping in the siding. The sun damage put the deal at risk so we needed and expert opinion right away. CSR had someone come out for an assessment super quick and wrote up a full report assuring the buyer the damage was merely cosmetic. Saved us a bunch of trouble and time! Thanks, Colorado Siding Repair!
Reviewer photo
Breezy Schaefer
Everything about this company was amazing. Exceptional service, high quality product and the finished project looks better than I imagined. Cash was extremely knowledgeable when it came to his products and him and his group were so responsive. They made scheduling quick and easy and the employees working on the project were on time and finished that day. There is no project too big or too small for them. I will definitely be using Colorado Siding Repair for my future home project needs.