720-427-4477Longmont Window Company
Window Replacement, Installation, and Care
For decades, JDI Windows has been known for precision installations, lasting craftsmanship, and caring service. Choosing us means choosing windows that are done right the first time.
From Prospect New Town to Clover Basin and Old Town Longmont, reach out today for expert service you can trust.
JDI is the 2024 winner of the Best of the Best award.
Recognized for our dedication to excellence, JDI Windows has become the trusted window company of choice in Longmont. With decades of hands-on experience, we handle every job — large or small — with care. If your windows are aging, inefficient, or damaged, we offer long-lasting solutions you can count on.
Award-Winning Window Installation Company in Longmont
As one of America’s most respected local businesses since 2020, JDI Windows is proud to have earned the Best of the Best award annually since 2015. These accomplishments speak to our reputation for skill, service, and results. As a trusted Longmont window company, we deliver more than windows—we provide upgrades that truly transform your home.
OUR PROCESS
How We Work
We keep things simple, transparent, and tailored to your needs—so replacing or installing windows is never stressful. If you’re ready to update your Longmont home, here’s what to expect:
Request a Quote
Getting started is easy! Simply call us at 720-619-3121 or fill out our online contact form. Once we have your request, we’ll follow up with a call to go over your project. We’ll ask about the number of windows, the style you’re considering, and details about your home so we can recommend the best options.
Receive an Accurate Quote
After gathering information, we’ll send you a clear, accurate quote tailored to your project. You’ll have the chance to review everything before moving forward. With JDI Windows, you’ll always know the cost upfront — no hidden charges or unexpected fees.
Seal Your Order
Once the project terms are agreed upon, we’ll move forward to the next step. Our installation specialists will schedule a measuring appointment within 48 hours. During this visit, we’ll take precise measurements of your window spaces to ensure the replacement windows are a perfect fit, guaranteeing a seamless and professional installation.
Schedule Your Installation
As soon as your windows arrive, we’ll work with you to set a convenient installation date. After installation, our crew makes sure your home is left spotless and that you’re 100% satisfied. If any concerns come up, we’ll handle them right away. We’re dedicated to delivering a seamless window installation experience in Longmont, offering a wide range of product choices, precise custom-fit installations, and exceptional customer service.
Comfort, Savings, and a Better Home
Leaky or damaged windows don’t just cause frustration—they raise energy costs and lower property value. By upgrading, you’ll enjoy greater efficiency and an updated look. JDI Windows has the right options for your Longmont home.
Services JDI Windows Offers
Installation
JDI Windows
Installation Service
Building a new home or upgrading an older one in Longmont? We’ve got you covered. As a top-rated window company in Colorado, we combine trusted expertise with high-quality products to deliver a final result you’ll love.
Replacement
Reliable Window Replacement Service
Noticing signs of damage, warping, or poor insulation? We’re here to help with our replacement window services. We’ll evaluate your current windows and recommend energy-efficient, stylish replacements that align with your home’s look and your budget.
Energy-Smart Windows, Built to Last
At JDI Windows, we choose Altius because they’re known for energy savings and long-term performance. Every window is Energy Star certified and custom-fit, giving you better comfort, lower costs, and timeless appeal.
Building Trust, One Window at a Time
Since 1997, JDI Windows has made honesty and craftsmanship the foundation of our work. Our A+ BBB rating and great reviews prove that commitment. Unsure about your options? Book a free in-home consultation in Longmont and let us help you find the perfect windows for your home.
Look for a Dealer with a Wide Selection of Windows
When selecting a window company, it’s important to work with one that offers more than just a few standard options. Every home is unique, and your windows should reflect your style, budget, and performance needs. At JDI, we provide homeowners with access to over 300 different window styles, materials, and sizes. From modern designs to classic looks, our team helps you customize the perfect fit so your new windows enhance efficiency, comfort, and curb appeal.
JDI has over 300 styles, materials & sizes of windows.
Work with a Trusted, Local Professional
Instead of relying on national chains that treat customers like numbers, choose a local window company that understands your community and your home’s needs. JDI is family-owned and has over 50 years of combined experience serving Colorado neighborhoods. As a trusted window company in Longmont, we focus on delivering quality craftsmanship, personalized care, and results that last.
JDI is a family-owned company with over 50 years of combined experience.
Ask Questions About Pricing, Service, Installation, and Warranties
When comparing one company to another, make sure you’re getting clear answers about pricing, installation, and warranties. At JDI, we believe in honesty and transparency from start to finish. Our quotes are straightforward with no hidden fees, and our warranties give you confidence that your investment is protected. Backed by unmatched service and skilled installers, we make window replacement simple and stress-free.
At JDI, we believe in complete transparency and unmatched expertise.
JDI Windows: The Right Choice for Professional Window Installation in Longmont
Customer Testimonials
Frequently Asked Questions
How long will it take to install my new windows?
Most installations in Longmont can be completed in just one or two days, though the exact timeline depends on the number of windows and the complexity of the project. Our skilled installers work quickly but never cut corners—we prioritize both efficiency and craftsmanship. By the time we’re finished, your home will be left clean, with beautiful new windows installed to the highest standard.
Can I replace my windows in the winter months?
Absolutely! Our team installs year-round, and many Longmont homeowners choose to upgrade during the colder months. Replacing drafty or poorly insulated windows in winter allows you to experience immediate improvements in warmth, comfort, and energy savings. Our installation process is designed to minimize exposure to the elements, so your home stays comfortable even during the project.
Will the quote I received change after you take the measurements?
We take pride in providing honest, upfront pricing. The initial quote you receive is designed to reflect the full cost of your project with no hidden charges. If adjustments are required after final measurements, we’ll discuss them with you in detail before moving forward. Our goal is to ensure you feel confident and informed every step of the way.
How do I choose the right windows for my home?
With so many options available, it can feel overwhelming to know where to start. That’s where we come in. Our team will walk you through all of your choices (styles, energy ratings, glass types, frames, and finishes) so you can make a decision that balances aesthetics, performance, and budget. We’ll recommend solutions that suit your Longmont home’s architecture and your family’s lifestyle.
What signs indicate that my windows need to be replaced?
There are several warning signs to look out for. Drafts, noticeable temperature fluctuations, condensation or fog between panes, difficulty opening or closing, and visible damage like cracks or warping all indicate it may be time for an upgrade. Rising energy bills can also be a clue that your current windows aren’t performing efficiently. Replacing them with modern, energy-efficient options can improve comfort and reduce costs.
