#1 Fort Collins Siding and Window Contractor

Fort Collins Siding and Window Experts

Let the trusted professionals at Bellwether Windows, Siding, & Doors in Fort Collins help you design and install high-quality siding and window solutions tailored to your home and budget.

Get expert siding replacement, window replacement, and James Hardie siding installation from Fort Collins’ trusted siding company.

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Fort Collins Siding, Windows, and Doors

Since 2017, Bellwether has proudly served as one of the leading siding companies in Fort Collins, delivering customized siding replacement and window replacement solutions that match the city’s charm and climate. At Bellwether, we understand the unique needs of Fort Collins homeowners and offer custom solutions tailored to each property.

Whether you’re looking to update your siding, replace your windows, or undertake a comprehensive exterior remodel, we are committed to delivering high-quality products and exceptional craftsmanship.

As a James Hardie Elite Preferred Contractor and Pella Platinum Certified Contractor, we specialize in durable, high-performance materials designed to withstand Fort Collins’ climate while enhancing your home’s curb appeal. From stylish and secure windows to long-lasting siding, we provide the complete package to create a beautiful, functional, and resilient home exterior.

Recent Fort Collins Exterior Siding Projects

See What Our Clients Have to Say

Excellent
4.8
Great experience with sales, construction, and customer service. We did James Hardie siding and it transformed our property. Would highly recommend!
Jay Blue
3 days ago
So, a little over a year has passed since we had our beautiful Pella windows and slider replaced. These have performed exceptionally and have far exceeded our expectations!! We continue to wholeheartedly recommend Bellwether!! Our original review is also below: Our experience with Bellweather and having new windows installed has been awesome! From first contact with Seth our Project Guide who helped us determine what kind of windows and pricing would best fit our needs and budget; to then working with the Project Manager Dylan who prepped us on what to expect, scheduled all of the work, and walked with us through the entire process; to the installation team and their lead Angel, all of whom were extremely good at their work, very kind, respectful, and completely thorough; and to the folks behind the scenes, Katie who kept us in the loop with window and dumpster delivery, billing and more, and Karen who kept us square with permits and HOA approvals... everyone along the way was professional, kind, thorough, and communicative. Our new Pella windows make our home feel whole, and we can already feel the difference. My wife and I are very grateful to the good folks at Bellweather and whole heartedly recommend them for any siding or window project that you might be considering.
lynn Shepherd
5 days ago
Matthew Dwyer
6 days ago
great experience, and great people
Rich Horstmann
2 weeks ago
Everything went really smooth...no pressure and great customer service.
Deb Eastberg
2 weeks ago
We were referred by a neighbor. We called for an estimate and everything was complete within about 2 weeks. I have no complaints!
Installing new siding was so easy with Bellwether! From our first meeting with Rick I was impressed with the level of detail and professionalism. The project manager explained every step of the process clearly. Dylan was detail oriented and thorough with his post project walk through. We love the way our house looks! It was a pleasure working with everyone at Bellweather.
We had a great experience with Bellwether. They were wary to work with. Great craftsmanship and overall experience.
Sheri May
3 weeks ago
Great service, great staff. They've been very responsive and helped sort out every issue we ran into with our siding. The installer helped us work through a problem where the window was crooked with the siding and now you can't even tell. Would recommend.
Linda Reyes-Hart
3 weeks ago
If you’re looking for window and door replacement, I can’t recommend Bellwether enough. From start to finish, the entire process was smooth and straightforward. Their pricing was competitive and reasonable, and the installation crew was prompt, respectful, and completed the job in a very reasonable timeframe without cutting any corners. The final result looks fantastic—so much so that we immediately recommended Bellwether to our neighbors next door. Great team and top-notch work!
Robert Bruce
3 weeks ago
Dylan and his team were excellent to work with. Dylan was exceptional in all regards to our siding, trim, gutters and paint project. He was excellent at keeping us informed of progress and very receptive to our questions, issues and concerns. We highly recommend Dylan as a project manager to anyone requesting Bellwether's services.
John Ambroz
4 weeks ago
The crew was fantastic from start to finish, very friendly and hard working. The project manager was always in contact with me, making sure all was being done and there were no problems. I would recommend bellwether to anyone.
Cathy Payne
4 weeks ago
The process from the beginning to end has been seamless. I am very pleased with my new Pella windows.
Paul
1 month ago
Bellwether did an excellent job installing siding on my cabin. Rob was knowledgeable and skilled. He went the extra mile on my project.
Chad Neb
1 month ago
Awesome team approach from Teri the sales professional to Dylan the project manager and Luise and his team that did the install. I’d refer over and over.
Larry Ruiz
1 month ago
Ryan came out to the house and gave a very detailed and informative sales presentation, and sold us on siding the house with a very quality product. Can’t wait to get the siding on the house
Ol'man Conway
1 month ago
Joseph Wynn
1 month ago
Great work with, great job. Project manager Dylan was awesome kept me updated throughout the build. Did Window replacement, front siding, and roof fascia’s and soffits. They look amazing
Jim Bahne
1 month ago
We put Pella top of the line windows in our custom home 49 years ago. Loved them. We’ve been replacing them slowly over the past 10 years with the new version Pella windows that have improved insulation and locking mechanisms. We have found Bellwether to be competitive in their pricing and meticulous in their installation and customer follow-up. We cannot recommend them more highly.
Maddie Morabito
1 month ago
Bellwether was a great company to work with throughout the entire process! From the introductory meeting, to the installation, to the final quality assurance meeting, the process was seamless. We noticed a huge difference with the temperature control in our house after having the new windows installed, and we’ve already had neighbors mentioning how great the new siding looks. We highly recommend working with Bellwether!
Suzanne Brown-Lee
2 months ago
Wonderful experience replacing our siding. They were quick, efficient and thorough. Would recommend them.
tom dodick
2 months ago
Bellwether was professional from the beginning to the completion of the job. When they said something was going to be done, if was done. The job turned out looking extraordinary and I was impressed at the attention to detail at the end of the job. I was a contractor for 40 years and I know how paying attention to details can make or break a successful project. New siding is expensive and if you're going to have it done, you want it done right and professionally, Bellwether did that.
Peter
2 months ago
I’m not easily blown away, but I am so far! From Ryan’s incredible customer service, to Rob’s transition into production, and today, Dylan with Angel’s crew getting me out of a jam! The roofing contractor (not Bellwether) needed the facia removed and blocked. With less than 12 hours notice Dylan mobilized Angels crew who knocked it out in a single day: Safely and Professionally! I could not be happier with my selection of Bellwether!
Lynnmarie Hannapel
2 months ago
We were in dire need of a backdoor/storm door replacement and our large kitchen dining area window. Bellwether provided us with a professional consultation with all our questions answered and a reasonable price. The organization of the project provided us with professional services from the initial consult with Teri Tovar who understood exactly what we needed, to the Project manager, Dylan Hardin, who managed and delivered the project with personal attention to all the details and concerns along the way, to the installation crew who were amazing and left us with a beautiful window and doors that looked so good! We love the product, the on point service! It was a worthy investment all around! Thank you!
Aubrey Donnellan
3 months ago
Tony and the team was amazing!

Fort Collins Siding Replacement

From historic craftsman homes near Old Town to modern styles in new developments, Fort Collins homeowners count on Bellwether for durable, design-forward siding solutions. Our go-to material? James Hardie siding—renowned for its wood-like appearance, long lifespan, and exceptional performance in Colorado’s ever-changing climate.

With over 700 ColorPlus Technology finishes and a baked-on finish that resists fading, James Hardie siding offers unmatched design flexibility with low maintenance. And with tools like Hover 3D renderings, you’ll be able to see your future exterior before work begins.

As a trusted siding company in Fort Collins, Bellwether ensures your siding replacement goes smoothly from first consultation to final walkthrough, delivering beautiful results that last.

Fort Collins Window Replacement

Windows play a crucial role in your home’s energy efficiency, comfort, and style. At Bellwether, we install double- and triple-paned Pella windows, offering industry-leading performance and fire-resistant protection. Whether you’re updating the look or upgrading outdated systems, our expert window replacement services are tailored to your home, goals, and lifestyle.
Fort Collins Window Replacement
Fort Collins Door Replacement

Fort Collins Door Replacement

A strong, stylish door makes a big first impression—and keeps the cold (and heat) out. Bellwether offers expert door replacement in Fort Collins using durable, weather-resistant doors from leading brands like Pella. Whether you prefer a traditional wooden door, modern fiberglass, or something custom, we help you choose options that enhance style, safety, and energy efficiency.

Why Choose Bellwether for Your Fort Collins Home?

Bellwether isn’t just another siding company, and Fort Collins is more than just a location for us; it’s home. Our team’s strong connection to the community means we understand the unique character of Fort Collins homes and their needs. Two of our team members call this city home, and several are proud CSU alumni. We care deeply about preserving the character of local homes while protecting them from the elements.

When you choose Bellwether, you’re choosing a partner who provides high-quality craftsmanship, works with premium materials like James Hardie siding, and delivers personalized service. We’ll guide you through the remodeling process step by step, ensuring it’s a seamless and stress-free experience.

We love this town and are dedicated to enhancing its beauty, one home at a time. Let us help you create the home exterior you’ve always envisioned.

Why Choose Bellwether for Your Fort Collins Home

Working with Us Is Easy & Stress Free

We understand that the idea of remodeling your home can be exciting but can also feel overwhelming. We designed a simple process to make exterior remodeling easy & fun.

1. Project Consultation

conversation

2. Project Presentation

proposal

3. Project Approval

4. Pre construction meeting

Unique to Bellwether, we offer a pre construction meeting where we provide a clear and detailed scope before we begin building.

broom

5. Installation Day

6. Open Communications

Open communication with project manager crew leader, and internal representatives.

7. 100% Satisfaction Walk-thru

It's not over until you say so. We value your satisfaction with our product above all else. We offer final walkthrough to guarantee you are pleased.

Still Not Convinced?

More Reasons to Partner With Bellwether Exterior Designs & Renovation Experts

Bellwether is proud to be a top-rated siding company serving Fort Collins and the greater Front Range. We’re here to protect and elevate your home with reliable materials, thoughtful design, and attentive service.

30 - year Product Warranty | 15 - year Finish Warranty

Personalized Exterior Design Service

Excellent Service & Support Throughout Project Lifecycle

3D & HD Renderings of Your Home

Frequently Asked Questions

As an Elite Preferred James Hardie contractor, Bellwether recommends James Hardie siding because it offers the best blend of beauty, strength, and longevity for Colorado homes. It resists fire, rot, pests, and extreme weather, and it comes with a long-term warranty for peace of mind.
Fiber cement is made from a mix of cement, cellulose fibers, and water, making it resilient against wind, fire, and moisture. It’s ideal for Fort Collins’ climate and a smart choice for your siding replacement.
Yes! James Hardie siding is available in a variety of textures and colors to suit any architectural style, from modern to historic. You’ll have no trouble achieving the aesthetic you want without compromising on performance.

Still Not Convinced?

More Reasons to Partner With Bellwether Exterior Designs & Renovation Experts

Our team is proud to serve our homeowners on the Front range of Colorado. We know the unique needs of our clients and deeply care about the look and durability of your home’s exterior. Our team of experts are here to guide you through the process of repairing or replacing your home’s siding and windows.

30 - year Product Warranty | 15 - year Finish Warranty

Exellent Service & Support Throughout Project Lifecycle

Personalized Exterior Design Service

3D & HD Renderings of Your Home

Knowledge & Education Center

Make the best decision and get the most value for your remodeling dollar by reading our blog and becoming an educated buyer.

Denver James Hardie Warranty Colorado

Bellwether is proud to be an Elite Preferred James Hardie contractor because we believe in the quality and the benefits

Bellwether Gray Under Siding Colorado

At Bellwether, though we don’t build walls, we have complete knowledge of framing and wall construction so that we can

Tom and Diane Dimeff James Hardie Siding Colorado

Location: Longmont, Colorado Type of Siding: Cedar Age of House: Built in 1987 The Problem: The Dimeffs were dealing with