Longmont Window Replacement Company | Expert Window Replacement in Longmont

A+ BBB Rated & Top 5 Rated | Energy Efficient Solutions for Longmont Window Replacement

With window replacement in Longmont typically costing between $600 and $1,500 per opening, selecting the right contractor makes a significant difference in the long term value of your home. Custom Exteriors provides expert craftsmanship and high quality materials to ensure your project is completed correctly the first time. We focus on delivering reliable results that improve your home’s comfort, value, and curb appeal.

How Can We Help You?

Custom Exteriors Partners, Awards & Accreditations

Why Custom Exteriors is a Top-Rated Window Company in Longmont

Choosing a window contractor requires a partner with a proven track record of technical precision and access to industry leading products. At Custom Exteriors, we have built our reputation on a foundation of professional excellence and transparent communication. As a local contractor with deep roots in Northern Colorado, we understand the specific performance requirements that our climate demands.

We specialize in the installation of premium brands known for their durability and thermal performance, including ProVia, Anlin, and Pella. Our status as a highly rated window company is backed by a consistent history of five star reviews and top tier rankings on platforms like Google, our local BBB, and Angi. When you partner with us, you are choosing a team that prioritizes structural integrity and long term energy savings, ensuring your home remains comfortable and efficient for years to come.

Affordable Financing for Longmont Homeowners

Financing to Fit Your Budget!

Investing in your home is a major decision, but it should not be a financial burden. Custom Exteriors offers flexible payment plans that allow you to upgrade your windows immediately while spreading the cost over time. We work with leading lenders to provide competitive rates and a straightforward application process, ensuring your project fits comfortably within your budget.

Professional Window Installation

Premium Brands and Custom Sizes

Our inventory includes a wide variety of window styles designed to meet the aesthetic and functional needs of Longmont homes. Whether you are looking to improve your curb appeal or maximize thermal performance, we provide the technical expertise to help you choose the right configuration for your space.

Custom Window Styles: We install everything from standard double hung and slider windows to architectural casements and expansive picture windows.
Patio and Entry Doors: Our selection includes high security entry systems and smooth gliding patio doors that create a seamless transition to your outdoor living space.
Energy Efficient Glass Packages: Every product we offer can be customized with Low E glass and argon gas fills to meet local energy codes and reduce utility costs.
Quality Frame Materials: Choose from durable vinyl, composite, or fiberglass frames depending on your maintenance preferences and budget.

Managing multiple contractors for windows, siding, and roofing often leads to scheduling conflicts and communication gaps. Custom Exteriors simplifies the process by serving as your single point of contact for all exterior needs. This integrated approach ensures that throughout your exterior remodel, every component works together as a cohesive system, providing better protection against the elements and a more polished final appearance.

By consolidating your services, you eliminate the stress of coordinating different crews. Our team manages the entire timeline, ensuring that transitions between windows, siding, and trim are handled with professional precision.

Our Services

Roofing

Providing residential & commercial roof replacements, repairs, and maintenance.

Siding

Our siding services include high-performance fiber cement, engineered wood, vinyl, metal panels, and more.

Windows

We install energy efficient windows and entry doors that reduce your utility costs and increase your value

exterior paint

Our exterior painting services use high performance paints and stains that protect your home.

Gutters

We design and install custom made gutters and downspouts.

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Our Proven Process:
Five Steps to New Windows

Navigating a window replacement project is straightforward when you have a clear roadmap. At Custom Exteriors, we follow a professional five step sequence designed to ensure accuracy, maintain a clean job site, and deliver a result that meets our high standards. By managing every detail from the first measurement to the final walkthrough, we eliminate the guesswork and provide a predictable, stress free window replacement for every Longmont homeowner.

We evaluate your current windows and discuss your goals. We help you choose the best brands and styles to match your home’s needs and budget.

Our technicians perform exact measurements of every opening. This ensures your custom windows from Pella or Simonton fit perfectly upon arrival.

We coordinate a schedule that fits your life. On installation day, we protect your floors and furniture to maintain a safe, clean work environment.

Our trained crew removes old units and installs your new windows. We focus on proper flashing and insulation to ensure maximum energy efficiency.

We perform a final walkthrough with you to ensure everything is spotless and functioning correctly. We don’t leave until you are fully satisfied.

Finding Your Fit: A Guide to Window Styles

Choosing the right window style begins with evaluating your home’s architectural design, your specific needs for airflow, and the practical requirements of each room. While a double hung window offers a classic look that fits almost any space, you might prefer a casement window for areas like the kitchen sink where a crank is easier to reach than a sliding sash. We recommend walking through your home to identify where you want maximum ventilation versus where you simply want an unobstructed view of the Longmont landscape.

Versatile Double Hung Windows

Double hung windows are the most popular choice for Longmont homeowners due to their classic look and versatile ventilation. Featuring two operable sashes that slide vertically, these windows allow you to open both the top and bottom sections simultaneously. This design creates a natural cooling effect by drawing in fresh air through the bottom while pushing warm air out through the top.

Maximum View & Ventilation from casement windows

Casement windows are hinged and crank outward to the left or right.. This design allows for a full top to bottom opening, providing the most airflow of any window style. Because the sash presses firmly against the frame when closed, casements offer an airtight seal that is exceptionally effective against the high winds we experience along the Front Range.

Awning Windows: Weather Protection and Privacy

Hinged at the top and opening outward from the bottom, awning windows are perfect for maintaining ventilation even during a light Colorado rain. They are often placed higher on walls for privacy or paired with larger picture windows to add airflow without sacrificing the view.

Sliding Windows: Modern Style and Ease of Use

Sliding windows, or gliders, feature sashes that move horizontally along a track. They are an excellent choice for rooms where you have more width than height available. Because they do not swing outward, they are ideal for areas facing walkways, decks, or patios where exterior space is limited.

Bay/Bow Windows: Character and Space

Bay and bow windows extend outward from the exterior of your home, creating a dramatic focal point and adding interior floor space. A bay window typically features three glass panels, while a bow window uses four or more to create a gentle curve. These installations are perfect for creating cozy window seats or display areas.

Custom Designs for Unique Spaces

Not every window opening is a standard square or rectangle. Specialty shape windows allow you to add unique architectural flair with curves, angles, and custom geometries. From elegant arches to modern polygons, we provide expert installation for windows that serve as a custom design statement for your home.

Local Projects: Real Results for Longmont Homeowners

While technical specs provide the foundation for a quality project, seeing a completed installation in your own neighborhood offers the best proof of performance. Our recent projects section features in depth featured projects that go beyond simple photos. Each article breaks down the specific challenges of the home, the custom product specifications used to solve them, and a look at our professional process from start to finish.

By reviewing these local examples, you can see how we integrate premium brands like Anlin and Pella into real world Colorado homes. These deep dives provide transparency into our craftsmanship and help you visualize the potential transformation of your own exterior.

Recent Projects by Custom Exteriors:

Vinyl siding replacement in Fort Collins by Custom Exteriors

Fort Collins Vinyl Siding Replacement & Roof Repairs: A Comprehensive Exterior Remodel

Berthoud home with weather wrap prior to installing new vinyl siding.

Full Exterior Restoration and Impact-Resistant Roof Replacement in Berthoud

Repairs on this flat roof in Windsor are underway.

Commercial Roof Restoration in Windsor

Exterior of home upon completion of roof and exterior makeover by Custom Exteriors.

Exterior Painting Makeover and Roof Replacement in Milliken

Completed Certainteed roof replacement on West Loveland roof by Custom Exteriors.

Certainteed Impact Resistant Roof Replacement in the Loveland Foothills

East Loveland home after a Class 4, impact-resistant roof was installed by Custom Exteriors.

East Loveland Roof Replacement: Class 4 Impact Resistant Upgrade

Synthetic shingle roof being installed by Custom Exteriors, a Fort Collins roofing company

Davinci Designer Select Shake Fort Collins Roof Replacement

Ice and water shield installed on a Fort Lupton roof.

Fort Lupton Roof Replacement Project

What Your Neighbors are Saying About Custom Exteriors

Annie G.

Custom Exteriors and Ryan May were great for helping with new windows for our home! Ryan and his coworkers were so helpful and knowledgeable. The process was easy from hearing about the product to getting everything installed. We love our new windows!

Tristan B.

I cannot say enough about the quality and care Custom Exteriors provided for us. The whole team involved with our project were supportive and helpful. They took my calls every time, and if there was an issue it was quickly resolved. They kept communication open and insightful throughout the process. I highly recommend Custom Exteriors.

Steven M.

Excellent communication and updated project status, information consistently. Work performed on our siding replacement and painting was superior, clean up was also done well! Would highly recommended John and Mike to anyone!!

The Advantages of New Windows

Lower energy Bills:

One of the most immediate benefits of new windows is the potential for significant savings on your energy bills. Modern windows are designed to minimize heat transfer. So, they can keep your home warmer in the winter and cooler in the summer.

increased Comfort:

With energy-efficient windows, you can say goodbye to drafts and swings in temperature. This is because they have superior insulation properties. So they can maintain a consistent indoor environment year-round. They then allow you to enjoy your living space in comfort.

Lower Carbon Footprint:

Using less energy for heating and cooling doesn’t just save you money, it also benefits the environment. So, by reducing your energy consumption, you lower your carbon footprint. Because of this, you are contributing to a more sustainable future.

UV Protection:

Energy-efficient windows often come with coatings that block harmful UV rays. UV Rays can fade your furniture and flooring over time. So, with UV protections, you can ensure a longer lifespan for your belongings.

Noise reduction:

If you live near busy streets or noisy areas, energy-efficient windows can help reduce that noise. This is because the insulated design acts as a barrier. In doing so, it creates a quieter indoor environment.

Improved Home Value:

Potential buyers are often willing to pay more for homes with energy-efficient features. So, replacing your windows with an energy-efficient option makes your property more valuable in the real estate market.

Durability:

Energy-efficient windows are often built to higher standards. So this can result in increased durability and a longer lifespan. This also means fewer maintenance costs and longer-lasting performance.

Customizable Choices:

Energy-efficient windows come in various styles and materials. A reputable Longmont window replacement company will help you choose options that are energy-efficient and match your style preferences.

Frequently Asked Questions About Getting New Windows In Longmont

What is the average cost of a quality replacement window?

For a high-quality residential window in Longmont, you can expect to pay between $600 and $1,500+ per opening including installation. This range fluctuates based on the frame material, glass package, and the complexity of the installation.

Who offers the best windows for the money?

Brands like Pella, Anlin and Simonton consistently offer the best balance of durability, energy efficiency, and cost. They provide premium features, such as high-performance weatherstripping and advanced Low E glass, at a price point that offers a strong return on investment for Colorado homeowners.

How much should it cost to install a window?

Labor costs generally range from $200 to $500+ per window. Factors that influence this price include the condition of the existing frame, whether you are doing a pocket or full-frame replacement, and the height of the window on the home.

Can I get a tax credit for installing new windows?

Yes, under the Energy Efficient Home Improvement Credit (part of the Inflation Reduction Act), homeowners may be eligible for a tax credit of up to 30% of the cost of energy-efficient windows, capped at $600 per year. The windows must meet specific Energy Star requirements to qualify.

Which type of windows last the longest?

Fiberglass and high-end composite windows are known for their extreme longevity, often lasting 30 to 50 years. However, premium vinyl windows from reputable manufacturers have closed the gap significantly and can easily last 20 to 30 years when professionally installed and maintained.

Is it worth replacing 20-year-old windows?

Yes. Modern windows from brands like Milgard, Pella, and Anlin are significantly more energy-efficient than those built two decades ago. Replacing old windows can reduce your heating and cooling costs while eliminating drafts and improving home security.

How do Colorado’s temperature swings affect window choice?

The Front Range experiences intense UV exposure and rapid temperature changes. It is vital to choose windows with a low U-factor and high-quality spacers between glass panes to prevent seal failure caused by the constant expansion and contraction of materials.

Is triple-pane glass worth the extra cost in Longmont?

While double-pane glass is sufficient for many homes, triple-pane glass provides superior sound dampening and thermal insulation. If your home faces a busy street like Main Street or Hover Street, or if you want the absolute highest energy savings, the investment in triple-pane is often justified

How long does the actual installation process take?

A professional crew can typically install 8 to 12 windows per day. A standard-sized home in Longmont is usually completed in one to two days, including the final exterior trim work and site cleanup.

Should I replace all my windows at once?

Replacing all windows simultaneously is the most cost-effective approach because it reduces mobilization fees and ensures consistent energy performance. However, if budget is a concern, prioritizing the north and west sides of your home can provide the most immediate relief from Colorado’s winter winds and summer sun.

What is the difference between a manufacturer warranty and a labor warranty?

A manufacturer warranty covers defects in the window itself, such as glass seal failure or frame warping. A labor warranty, provided by Custom Exteriors, covers the quality of the installation. Having both ensures that you are protected against both product failure and installation errors.