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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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David Haller
We used Colorado Siding Repair (CSR) to 1) repair specific exterior trim/siding water damage from poor builder design; 2) replace all exterior trim to avoid future issues from poor builder design; 3) repaint exterior; 4) add custom shutters to exterior; and 5) add gutters for improved protection. I tried to contact several businesses to get quotes on this project, and most would not call me back, given the scope of work. But CSR was game and Cash was my first point of contact. Cash was informat... Read more
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Atiq Mir
Emailed and called them for a repair estimate for wind-damage on siding. Seems like they don't repair a few panels. However, instead of simply saying no or ignoring my email and call (like others have done), they took time to send me couple of local handyman referrals who do small jobs like that. Greatly appreciate it!
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Cory Fryer
Replaced siding on entire side of house! Excellent work done by Miguel and Marcelo and their female assistant. Just an amazing team. Project took three days and it was painted and all. The workmanship was incredible and they were so meticulous about every stage of the project. The product they used to replace the old Masonite siding that we had will last so long and is amazing! We highly recommend using this company. Cash , the owner and Keith, Karen and Katelyn were all amazing! Will use ... Read more
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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.
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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