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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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
Fran Dong - 681 Saint Andrews Lane , Louisville, CO, US
Colorado Siding Repair replaced our old siding with JamesHardie sidings/trim. Great experience working with them. Excellent job overall. We are very pleased that we chose them over three or four other bids. The results were excellent and would not hesitate to use them for any other services they provide. They also took care of some minor issues we brought up once we were there. I would highly recommend if you want new siding.
Reviewer photo
Luke Meyer - 9165 Bell Flower Way , Littleton, CO, US
The project went smooth from start to finish. They started exactly when expected and ended when as they said. They did a good clean job. Our house looks so good now. The rates were very competitive and I believe we got a great deal! I am getting compliments all the time. It was money well spent. You can't go wrong with this company !
Reviewer photo
Katelyn Lindsay - 9776 Malachite Court , Parker, CO, US
Cash and his team at CSR are awesome. Replaced the siding on the backside of my house, along with all the trim around all windows. Did a full paint job as well. He was very responsive, super honest and thorough about all questions we had, and felt his pricing was fair. Would highly recommend and will always be my go-to for all siding related issues.
Reviewer photo
Steve Tinnes - 8829 Thunderbird Court , Parker, CO, US
Bellwether installed new entry doors, James Hardy siding, soffit, and facia. Great involvement and follow up all the way from salesperson to Owner. I was impressed with the quality of their work.
Reviewer photo
Kalin Ivany - 7654 South Harrison Way , Centennial, CO, US
Overall, this was incredible and painless project. Keith worked with us to get our vision for the new siding and windows and walked us through the plan and process. Vicente was an excellent project manager, and we were so happy with the crew. Siding installation was quick, and I really appreciated how the crew cleaned up at the end of each day. Alex and his team were fantastic with the paint; Oscar's gutter installation was stunningly quick; Rigoberto's work finishing the punch list items brough... Read more