Your Top-Rated Longmont Siding Company | Premium Siding Installation and Replacement

A+ BBB Rated & Top 5 Rated | Upgrade Your Longmont Home with Hail-Resistant Siding

With siding installations in Longmont costing between $8,000 and $25,000 and up for most homes, choosing the right contractor is important. At Custom Exteriors, we focus on providing long term value by combining high performance materials like James Hardie fiber cement with the precision of a locally owned team that has served the Front Range since 2018.

How Can We Help You?

Custom Exteriors Partners, Awards & Accreditations

Experienced Northern Colorado Siding Professionals: Expert Installation and Proven Results

When you choose Custom Exteriors for your exterior remodel, you are partnering with a team that maintains an A+ rating with the BBB and a 5.0-star Google rating. As members of both the James Hardie and LP SmartSide contractor networks, we bring specialized expertise to every installation. We stand behind our craftsmanship with an industry leading warranty, ensuring your home is protected by the best materials and the highest standards of installation. Our understanding of local building requirements and the Colorado climate means your siding will look beautiful and perform reliably for decades.

Working with our team you can expect:

Flexible Financing for Your Siding Project

Affordable Payment Plans for Longmont Homeowners

Whether you are looking for low monthly payments or deferred interest plans, our team provides a streamlined application process with quick approvals. This allows you to address urgent needs, such as hail damage or failing exterior envelopes, while keeping your monthly expenses manageable. We work with reputable lenders to ensure you receive competitive rates and transparent terms, making it easier than ever to secure your home with premium siding.

Siding Essentials

Siding Options for Your Longmont Property

James Hardie
Fiber Cement Siding

The Longmont climate demands an exterior capable of withstanding high UV exposure and rapid temperature changes. James Hardie fiber cement is engineered to resist the warping and cracking often caused by our dry mountain air. By utilizing ColorPlus Technology, your home benefits from a factory applied finish that retains its vibrancy and resists fading far more effectively than traditional paint applied on site.

Everything you should know about your siding project

Upgrading your siding is a significant investment that impacts both your home’s value and its energy performance. Our team provides clear guidance on which materials offer the highest return on investment and what to expect regarding long term maintenance. From questions about insulation R-values to specific local building codes in Longmont, we provide the expertise needed to help you make an informed decision.

LP SmartSide
engineered wood siding

For homeowners seeking the authentic texture of natural wood combined with the strength of modern engineering, LP SmartSide is an excellent choice. This siding undergoes a proprietary treatment process specifically designed to resist fungal decay and termites. It provides superior impact resistance against hail and windborne debris, making it a highly durable investment for homes across the Eastern Plains and the Front Range.

Professional Siding Replacement: Your Longmont Exterior Experts

Custom Exteriors is proud to serve Longmont, known for its stunning views of the Rocky Mountains and quick access to Estes Park and Rocky Mountain National Park. As locals of the area, we understand that every Longmont home is unique, so we offer a wide variety of siding options tailored to fit your home’s style.

If you’re ready to upgrade your home’s exterior, Custom Exteriors is Longmont’s trusted siding contractor. Backed by our excellent reputation and dedication to providing high-quality services, we offer siding replacement, installation, and comprehensive exterior solutions, including roofing, windows, exterior paint, and gutters. We ensure your home looks its best from top to bottom, all while using only one contractor, simplifying your exterior remodel.

Our team is skilled at installing fiber cement, wood, composite, vinyl, stone, or steel siding. Whatever your style, we have the perfect solution to improve your home’s appearance and protect it from Longmont’s ever-changing weather. We work with top siding manufacturers like James Hardie®, LP SmartSide®, Mastic®, and more.

Why Choose Us:

Top-5 Rated, Local Contractor
One-Stop Exterior Shop
Locally Owned & Operated
Flexible Financing Options
Licensed & Insured
Local Longmont Expertise
Insurance Negotiation Pros
Transparent Communication
Clear, Easy to Understand Estimates

Custom Exteriors | Your All-In-One Solution For Exterior Services

Roofing

We provide expert solutions for everything from minor repairs to complete roof replacements. Our team specializes in the roofing systems most common in Longmont, including asphalt shingles, metal panels, and commercial systems. We also eliminate the stress of storm damage by managing the insurance negotiation process to ensure your claim is approved and your home is protected.

Siding

Whether you require a full replacement or a minor update, our team provides the specialized siding expertise your property demands. We focus on the most reliable materials for the Colorado climate, including durable James Hardie fiber cement, LP SmartSide, and low-maintenance vinyl. Our professionals manage every phase of the project to ensure your exterior receives a clean, lasting finis

Windows

Whether you are looking to improve energy efficiency or update your property’s style, we provide professional installation for the top window brands on the market. We expertly install windows from Milgard, Pella, and Anlin to ensure a perfect fit for your home or business. Our focus on quality selection guarantees that your new windows are built to perform reliably in the Colorado climate.

Exterior Painting

Whether you are seeking a fresh color update or a full protective coating, we provide professional painting services designed to withstand the Longmont elements. We specialize in high-quality finishes for siding, trim, and accents, ensuring every project provides a clean final result. As a proud partner of Sherwin-Williams, we use their premium line of exterior paints to guarantee a durable finish for your property.

Gutters

A reliable gutter system is essential for protecting your foundation and siding from water damage. We install seamless gutter solutions designed for maximum drainage and durability, handling everything from standard replacements to reinforced systems built for heavy snow and rain. Our K-style gutter installations are custom made on-site to ensure a perfect fit for your home’s specific dimensions.

Custom Doors

Improve your property’s security and curb appeal with a door system tailored to your unique style. We specialize in installing high-performance entry doors and elegant glass patio doors that keep your home beautiful, efficient, and secure. Beyond the aesthetic upgrade, a custom entry door is a proven way to add measurable value and energy efficiency to your home.

Exterior Painting
by Custom Exteriors

Exterior house painting from Custom Exteriors comes with:

Siding replacement in Longmont by Custom Exteriors

Maintaining your home’s exterior in Longmont doesn’t have to be overwhelming, especially with the right siding. At Custom Exteriors, we take pride in being a trusted local siding contractor with extensive experience in Longmont’s unique climate. Our team is committed to providing high-quality, durable siding solutions that protect your home and improve its look.

As one of the top siding companies in the area, we offer personalized services and transparent estimates for every project. Whether you’re planning a full siding replacement or just need an estimate, we’ll ensure you understand the costs, the siding products long term maintenance needs, and scope of the work. Our experienced team works with a variety of materials, including vinyl, cedar, and fiber cement siding, to deliver the best protection for your home against hail, fire, and even woodpeckers.

At Custom Exteriors, we’re here to help Longmont homeowners find the perfect siding to fit their style, budget, and protection needs. Contact us today for a detailed estimate, and let us safeguard your home with our expert siding solutions.

Our siding team is made up of skilled installers of:

What Your Neighbors are Saying About Custom Exteriors

Patrick B.

We recently had the pleasure of working with a highly professional company through our Home Insurance Agent. Everyone employed or contracted through this company are professionals in their hired crafts! We could not be more pleased. Our home looks like the day my wife and I bought it. We don’t look forward to anymore hailstorm repairs but we know who we’re calling should we ever need their assistance again! Thanks Everyone!!!

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!!

Judy C.

Custom Exteriors provided exceptional professional service in the restoration of our home after the severe hailstorm in July 2024. We had to replace the roof, skylight, siding, gutters and downspouts, front door, and window screens. Mike O'Brien personally inspected the work and ensured the final project met his standards. I highly recommend Custom Exteriors.

Serving the Front Range & Beyond: Recent Projects

At Custom Exteriors, we take pride in being a trusted name for homeowners across Northern Colorado and Southern Wyoming. Our team understands the unique challenges our regional climate poses, from high-altitude sun exposure to heavy winter snow, and we deliver exterior solutions built to last.

From roofing and siding to windows and gutters, our recent work showcases our commitment to craftsmanship and durability. Browse through our completed projects to see how we’ve helped your neighbors enhance their curb appeal and protect their homes against the elements.

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

Frequently Asked Questions About Siding Replacement in Longmont

How much does it cost to side a 2,000 sq. ft. house in Longmont?

In 2026, the average cost to side a 2,000 sq. ft. home typically ranges from $12,000 to $22,000+, depending on the materials you choose. Vinyl is the most budget-friendly option, while premium materials like James Hardie fiber cement or stone accents fall on the higher end due to their durability and specialized installation requirements.

Is it better to remove old siding before installing new siding?

Yes, a full tear-off is always recommended. Installing new siding over old material traps moisture, hides existing rot or pest damage, and can void manufacturer warranties. Removing the old layers allows us to inspect your home’s sheathing and install modern housewrap, ensuring a dry, energy-efficient exterior.

Is it cheaper to paint siding or replace it?

Painting is cheaper upfront, usually costing between $3,500 and $7,500. However, if your siding is warped, cracked, or rotting, paint is only a temporary cosmetic fix. Replacement is a better long-term investment, as it lasts 30+ years and significantly improves your home’s insulation and structural integrity.

Which siding and window brands do you offer?

We only install high-performance products built for longevity, such as James Hardie fiber cement siding, LP SmartSide engineered wood siding, vinyl siding and premium window systems from brands like Milgard, Pella, and Anlin.

What is a better option than vinyl siding?

For the Colorado climate, James Hardie fiber cement is the superior choice. Unlike vinyl, which can crack in extreme cold or melt in high heat, fiber cement is fire-resistant, hail-resistant, and won’t warp. LP SmartSide is another excellent engineered wood alternative that offers high impact resistance against our frequent summer storms.

What siding colors increase home value?

Timeless neutrals and nature-inspired tones currently offer the best return on investment. Whites, soft grays, and earthy taupes remain top choices for resale. In 2026, we are also seeing a rise in “organic” colors like navy blue, forest green, and charcoal, which provide a modern look that stays in style for years.

Will homeowners insurance cover rotted siding?

Typically, no. Homeowners insurance is designed to cover “sudden and accidental” damage, such as hail or wind. Rotted siding is generally classified as a maintenance issue or “wear and tear,” which is not covered. However, if the rot was caused by a covered peril (like a storm damaging your roof and leading to a leak), you may have a claim.

How long does a siding replacement project take?

For an average-sized home in Longmont, a professional siding replacement usually takes between 7 and 14 days. This timeline includes the removal of old materials, any necessary wall repairs, the installation of new siding and trim, and a thorough final cleanup of your property.

Do I need a permit to replace my siding in Longmont?

Yes, most municipalities in Northern Colorado, including Longmont, require a building permit for siding replacement. This ensures the installation meets local wind load and energy codes. As your contractor, we handle the entire permitting process and coordinate the necessary inspections for you.

Can new siding improve my energy bills?

Absolutely. When we remove your old siding, we have the opportunity to install high-performance housewrap or rigid foam insulation. This creates a “thermal break” that prevents heat from escaping in the winter and keeps your home cooler in the summer, leading to measurable savings on your utility bills.

What is the best siding for hail resistance?

Because Longmont sits in a high-hail zone, we recommend fiber cement or engineered wood (LP SmartSide). These materials are much thicker and more durable than standard vinyl or aluminum, which can dent or shatter during a significant hailstorm. Investing in impact-resistant siding can often lead to lower insurance premiums over time.