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Whether you're replacing outdated wood siding, upgrading to vinyl or fiberglass windows, or enhancing curb appeal with a new front door, we deliver expert craftsmanship and personal service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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Richard Bartosik
After going through the process of vetting several companies and receiving quotes for windows and siding, we decided to move forward with Bellwether. As you may have already figured out (if you're reading this you're likely shopping for a company), this process is not always the most pleasant as the companies vary greatly with the products they prefer, the prices can be drastically different even for the same products, and the overall feel of the representative that you're working with. To begi... Read more
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sheila ewing
Great experience with Bellweather Windows and Siding. From start to finish everyone I worked with was super! I had James Hardie siding and 4 Pella replacement windows installed. Seth, the salesperson was friendly, informative and clearly explained the process. Cole, the project manager kept the operation running smoothly and kept me in the loop with the progress of the job. Julio, the head of the installation crew was incredibly diligent in making sure they all got the job done efficiently each... Read more
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Vivian Gallant
Though the job started a bit bumpy with the foreman being changed out right before the job, Luis and especially Carlos took the reins and did an amazing transformation on our house. Beginning with David who designed a very complex siding facade, then it was well translated off the paper into reality. We were so impressed with and grateful for the hardworking Belwether employees who gave their utmost to get things right as well as their care and respect for our home. Thank you.
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Ginny Donovan
I've been thrilled with the service I've received from Bellwether. They did a beautiful job on my siding a couple years ago, and I've just now worked with them to replace my windows. Everyone involved with the company has been great to work with - polite, professional and thorough. One of the things that stood out to me is that I never had to remind anyone what color trim I had when I scheduled my window replacement, they knew what I had had done previously and ordered accordingly. They're very ... Read more
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Bell L
Cash Stricker was great and caught a couple of punchout items we hadn't noticed! It's stressful living in a construction zone for a week but the end result looks so good. Looking forward to comparing heating bills from past years now that our home has been ungraded to have OSB sheathing and Hardiewrap.