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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Jovana Kamenko - 6824 Olympus Drive , Evergreen, CO, US
Awesome company to work with. They helped ensure I got the custom look I wanted with hardie board. Our house looks incredible and we’re getting compliments from all the neighbors. The crew was meticulously, professional and fast and they left the work site very clean. Highly recommend Bellewether!
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Julia Cherkasskaya - 7066 East Maplewood Avenue , Centennial, CO, US
Great job! Huge thank you for the whole crew. Dave is a great and knowledgeable salesman, Cole our project manager was super responsive, Amy the designer came up with amazing colors and we are very satisfied, Karen the accountant is always in contact and never misses a message. Everything was very neat and organized. Everyone was very pleasant to work with. Thank you, Bellwether! I would recommend you to anyone who asks.
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Mitch Gerstenkorn - 10466 West Fremont Place , Littleton, CO, US
Customer Service is Unbelievable. Let’s just say my job had challenges and Paul, Cole, and Karen didn’t give up until it was all done to my satisfaction. I just noticed, somehow one side of one window didn’t get caulked, I shared a picture with Cole (over a year after the initial completion) and he came out immediately and addressed the problem! Over the top customer service is something most companies have forgot, but bellwether knows how to treat its customers! I will plan to use bellwether... Read more
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janet kidd - 23541 Genesee Village Road building 15, Golden, CO, US
Great business to work with
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Monica Smith - 1429 Flannagan Court , Erie, CO, US
I had an excellent experience working with Bellwether! From the initial consultation with Seth to the final walkthrough with Dylan. The team was professional and efficient. The quality of their work exceeded my expectations, and they made sure to keep me informed throughout the entire process. The project was completed on time and within my budget, which I truly appreciated. I highly recommend Bellwether for anyone looking for reliable, high-quality window replacement, painting and construction... Read more