Bellwether is proud to be an Elite Preferred James Hardie contractor because we believe in the quality and the benefits
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.
"*" indicates required fields
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.
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.
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.
Unique to Bellwether, we offer a pre construction meeting where we provide a clear and detailed scope before we begin building.
Open communication with project manager crew leader, and internal representatives.
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.
30 - year Product Warranty | 15 - year Finish Warranty
Personalized Exterior Design Service
Excellent Service & Support Throughout Project Lifecycle
3D & HD Renderings of Your Home
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
Bellwether is proud to be an Elite Preferred James Hardie contractor because we believe in the quality and the benefits
At Bellwether, though we don’t build walls, we have complete knowledge of framing and wall construction so that we can
Location: Longmont, Colorado Type of Siding: Cedar Age of House: Built in 1987 The Problem: The Dimeffs were dealing with
The building industry changes fast. New materials, methods, and codes come up every year. Not every contractor adapts, which is why staying current with industry
Fall is the best time for a home remodeling project, offering unique advantages that other seasons simply can’t match. While many homeowners wait for spring
When siding begins to age, it often cracks, warps, or loses its ability to shield your home. In Colorado’s climate, where snow, wind, and sun