Siding Installation

St. Charles County, MO Area

Lifetime Craftsmanship Warranty

A+ Rating With the BBB

Free Estimates Within 48 Hours

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Transform Your Home with Expert Siding Installation

Gateway Exteriors has been beautifying homes in St. Charles County, MO and the surrounding areas since 1982. We're not just another siding contractor; we're a family-owned business with over four decades of experience in exterior improvements. Our team of long-tenured employees takes pride in delivering exceptional craftsmanship and attention to detail with every project. We believe in quality over quantity, which is why we never use subcontractors and stand behind our work with a lifetime warranty on craftsmanship.




In addition to siding, we offer a full range of exterior services, including windows, doors, gutters, and decking, designed to enhance both the beauty and functionality of your home. Our personalized approach ensures each project is tailored to your needs and style preferences. As skilled residential siding contractors in Wentzville, MO, we combine expert installation techniques with high-quality materials to create lasting results that homeowners can enjoy for years to come.

As a James Hardie Preferred Vendor, Mastic Elite Contractor, and LP SmartSide Preferred Installer, we've earned our reputation as the area's premier siding installation experts. Our commitment to excellence is reflected in our A+ rating with the BBB and our status as one of the best quality providers in the local area. We offer a wide range of siding options to suit every homeowner's needs and preferences, backed by robust product warranties. Don't settle for less when it comes to your home's exterior. Contact Gateway Exteriors today to experience the difference that true expertise and dedication can make.


We also prioritize modern solutions and materials that improve both the durability and curb appeal of your home. From energy-efficient windows to low-maintenance decking and gutters, every project is handled with the same care and attention that has defined our work for over 40 years. As leading residential siding contractors in Wentzville, MO, we focus on delivering results that combine beauty, performance, and long-term value.

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Why Choose Us

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Lifetime Craftsmanship Warranty

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A+ Rating With the BBB

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Free Estimates Within 48 Hours

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In Business Since 1982

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Product Warranties Honored

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No Subcontractors

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Diamond Kote Siding Installation

Our Diamond Kote Siding installation service offers a perfect blend of beauty and durability. This innovative siding option provides superior protection against the elements while offering a stunning, low-maintenance finish that'll make your home stand out in the neighborhood.
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James Hardie Siding Installation

As a James Hardie Preferred Vendor, we specialize in the installation of their renowned fiber cement siding. This exceptional product offers unparalleled durability, fire resistance, and a wide array of styles and colors to suit any architectural design.
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LP SmartSide Siding Installation

Our team is certified as an LP SmartSide Preferred Installer, ensuring expert application of this innovative engineered wood siding. LP SmartSide offers the warmth and beauty of real wood with enhanced durability and weather resistance.
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PVC Siding Installation

For homeowners seeking a low-maintenance, moisture-resistant option, our PVC siding installation is an excellent choice. This durable material resists rot, insects, and weather damage, providing long-lasting protection for your home.
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Steel Siding Installation

Our steel siding installation offers unmatched strength and longevity. This robust material stands up to extreme weather conditions, resists dents and impacts, and provides excellent insulation properties to improve your home's energy efficiency.
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Vinyl Siding Installation

As a Mastic Elite Contractor, we excel in vinyl siding installation. This versatile and cost-effective option comes in a wide range of colors and styles, allowing you to achieve the look you want while enjoying the benefits of low maintenance and durability.
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Recent Projects

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Here's what our satisfied clients are saying...

At Gateway Exteriors, we take pride in providing exceptional exterior improvement services to our clients. We would be grateful if you could share your thoughts about our business with others. Your feedback helps us improve and helps others make informed decisions. Please take a moment to leave a review of Gateway Exteriors and let others know what you think.

  • What types of siding materials do you install?

    We offer a wide range of siding options to meet every homeowner’s needs and style preferences. Our team installs fiber cement, engineered wood, PVC, steel, and vinyl siding, ensuring durability and low maintenance. Each material is carefully selected for weather resistance, long-term performance, and curb appeal. Our experienced installers provide precise, professional application for a flawless finish. As reliable residential siding contractors in Wentzville, MO, we guide homeowners in choosing the right siding material for both aesthetics and functionality, backed by product warranties and our lifetime craftsmanship guarantee.

  • How do I know if my home needs new siding?

    Signs that your siding may need replacement include visible damage, warping, water infiltration, or noticeable gaps and cracks. Fading or peeling paint can also indicate underlying issues. Our team conducts thorough inspections to evaluate your siding’s condition and recommend solutions tailored to your home. We assess material longevity, performance, and energy efficiency to help homeowners make informed decisions. As professional residential siding contractors in Wentzville, MO, we focus on ensuring your home is protected, looks its best, and maintains value through expert installation and high-quality materials.

  • Can you help with windows, doors, and other exterior upgrades?

    Absolutely. In addition to siding, we install energy-efficient windows and durable doors, as well as gutters, decking, and other exterior components. Our goal is to create cohesive upgrades that enhance both aesthetics and functionality. We tailor each project to your home’s style, ensuring materials are compatible and professionally installed. Our team handles every step, from initial consultation to completion, so homeowners enjoy a seamless experience. By combining multiple exterior upgrades, we help improve energy efficiency, curb appeal, and long-term durability while maintaining the same high standard of craftsmanship we apply to siding projects.

  • How long does a siding project typically take?

    The duration of a siding project depends on the size of your home, the materials selected, and any additional exterior work. On average, most installations can be completed within one to two weeks. Our team carefully plans each step to minimize disruption and ensure a clean, safe job site. As reputable residential siding contractors in Wentzville, MO, we prioritize efficiency without compromising quality. From removing old siding to precise installation and finishing touches, we manage every phase to ensure your project is completed on schedule while meeting our high standards of craftsmanship and durability.

  • Do you provide warranties or guarantees on your work?

    Yes. We stand behind our work with a lifetime craftsmanship warranty, and we honor all manufacturer warranties for the siding and materials we install. This means homeowners can feel confident that their investment is protected against installation defects or material failures. Our in-house team performs all work without subcontractors, maintaining consistent quality from start to finish. As professional residential siding contractors in Wentzville, MO, we combine our decades of experience with high-quality products to deliver durable results that homeowners can enjoy for years, knowing both performance and aesthetics are fully supported.

  • How do I get an estimate for my siding or exterior project?

    We offer free estimates within 48 hours of your inquiry. Our team evaluates your home, reviews your goals, and provides a detailed proposal outlining material options, pricing, and project timeline. We take the time to answer questions and help homeowners understand the benefits of different siding and exterior solutions. By handling everything in-house, we ensure accurate estimates and reliable project planning. As experienced contractors, we aim to make the process straightforward, transparent, and tailored to each client’s needs, giving you confidence in both the project and the results. From consultation through completion with consistent communication and professional workmanship.