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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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

Reviewer photo
KVN Construction
I know the owner of this company and the amount of work they put into providing an amazing result for their clients is absolutely phenomenal. Going above and beyond to build a firm that gives each client the best possible product with an experience 2nd to none. I highly recommend Colorado Siding Repair if your looking for a company that knows what it's doing and takes a massive amount of pride in their craft.
Reviewer photo
Steven Baer
We had a really great experience with Colorado Siding Repair. From the very start, Cash was responsive, upfront and creative. We had to redo a portion of our siding due to cracking and Cash and the team came right out, gave us a few options, including the woodtone product that we ended up going with that no other company suggested. We took a leap of faith to go with the woodtone siding since it's not on many houses. We trusted them that it would look great. The first few days after it was instal... Read more
Reviewer photo
Lindsay L
Since we moved into our home four months ago, we have been making lots of improvements to the house. We’ve worked with about eight companies of various trades, and our experience with Colorado Siding Repair has been the best of them all. Our new siding is durable, low-maintenance, and beautiful, and the whole process from design to completion was honestly a pleasure. The entire team is amazing—cofounders Cash and Paul are passionate, creative, and responsive; project coordinator Katelyn is knowl... Read more
Reviewer photo
Miriam T
I highly recommend Colorado Siding and Repair. Cash was great to work with. He met me on time and spent a long time discussing the project and going over options. The quality of the siding is great and I've gotten a lot of compliments on how the house looks now. The whole team was communicative throughout the process and worked to accommodate my schedule. Paul went through everything with me on the final walk through to make sure I was happy and kindly had someone come back to put up my house nu... Read more
Reviewer photo
Bruce Kaiser
We have used Colorado Siding Repair on two separate projects to replace worn siding with weather resistant hardy board siding. They were timely and very complete with their recommendations resulting in outstanding results in upgrading our house wrapping, trim and flashing installation and paint work. I will use them again on future siding work.