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Let us put your ideas in concrete.

Unerstall Foundations & Flatwork Inc

Serving the Greater St. Louis Metro Area since 1996

When it comes to building a strong foundation for your home or business, trust Unerstall Foundations & Flatwork Inc to protect your property and lay the groundwork for your safety and peace of mind.

Based in Union, MO, and Franklin County, our family-owned foundation repair company has served the Greater St. Louis metro area since 1996. From new home foundations and flatwork to concrete equipment rentals, foundation repairs, and sump pump installation, we have the equipment and expertise to kick off a seamless and successful construction project.

Let Unerstall Foundations put your ideas in concrete! Get in touch with us today to schedule a free estimate with a concrete contractor.

Worksite rainbow with Unerstall Foundations & Flatwork team

Dependable, top-notch concrete contractors

Restoring and establishing the structural integrity of your property shouldn’t come with a high price tag.

That’s why at Unerstall Foundations & Flatwork Inc, providing quality service at an affordable price is at the forefront of everything we do. Our team is ready to deliver concrete solutions for all your construction needs by offering a diverse range of services.

Need to rent concrete equipment or concrete forms?

Unerstall Foundations & Flatwork Inc is the leading supplier of concrete forms and concrete equipment rentals in the Greater St. Louis, MO area. With an expansive inventory of concrete forms, boom trucks, conveyor trucks, and more, we have the rental equipment you need to make your next job easier.

Counties we serve in Missouri

Franklin • Crawford • Gasconade • Warren • St. Louis • St. Charles • Jefferson

Not sure if we service your area?

Missouri county service areas map

About Us

After working in the construction industry for 45 years, Albert Unerstall recognized a growing need for concrete and foundation repair services in Franklin County and the surrounding areas.

In 1996, he founded Unerstall Foundations and Flatwork Inc. Our family-owned concrete contracting company continues to provide reliable, top-notch concrete solutions to residential and commercial clients throughout the Greater St. Louis metro area. In 2001, Albert’s wife, Cindy, started U-rent, Inc. as the demand for renting concrete forms and equipment increased for the do-it-yourselfer.

No matter how large or challenging the project may be, we’re the team you can trust to deliver results of the highest quality on-time, within budget, and with your satisfaction and peace of mind.

Frequently Asked Questions

Where is Unerstall Foundations & Flatwork Inc located?

Unerstall Foundations & Flatwork Inc is located in Union, Missouri, serving as a central hub for projects throughout Franklin County and the surrounding region.

How long has Unerstall Foundations & Flatwork Inc been in business?

Unerstall Foundations & Flatwork has been serving the region since 1996. Our company is backed by decades of experience, with a strong reputation for quality workmanship and reliability in the concrete and foundation industry.

What types of concrete flatwork do you do?

Unerstall Foundations & Flatwork specializes in a wide range of concrete flatwork projects, including driveways, patios, sidewalks, garage floors, and other flat concrete surfaces. Our team focuses on delivering durable, high-quality finishes for both functional and aesthetic purposes.

Do you handle both residential and commercial concrete projects?

Yes, Unerstall Foundations & Flatwork works on both residential and commercial projects. Our team has the experience and equipment needed to handle projects ranging from single-family homes to larger commercial builds.

What makes your concrete work stand out?

We combine hands-on experience with attention to detail, ensuring every project is built to last. We also take local soil conditions and environmental factors into account for stronger foundations.

How do you ensure quality on every job?

We stay involved throughout the entire process—from site prep to finishing—to make sure the work meets our standards and your expectations.

How do you handle project delays due to weather or other factors?

We communicate proactively if delays arise and adjust schedules as efficiently as possible while maintaining quality and safety standards.

How can I see examples of your past work?

We’re continually adding project photos and can share examples of completed work upon request to help you feel confident in your decision.

What areas does Unerstall Foundations & Flatwork Inc serve?

We serve Franklin County and the greater St. Louis metro area, including Crawford, Gasconade, Warren, St. Louis, St. Charles, and Jefferson counties.

 

What services does Unerstall Foundations & Flatwork Inc offer?

Our services include new home foundations, concrete flatwork, foundation repair, sump pump installation, and equipment rentals. They provide comprehensive solutions for both new construction and existing structures.

Do you install insulated concrete foundations (ICF)?

We primarily focuses on traditional poured concrete foundations and flatwork. For specific foundation types such as insulated concrete forms (ICF), it’s best to contact them directly to confirm availability for your project.

Do you provide basement waterproofing and sump pump installation?

Yes, Unerstall Foundations & Flatwork offers services related to foundation protection, including sump pump installation and solutions that help manage water around foundations to reduce the risk of damage.

Do you offer free estimates?

Yes, we provide clear and detailed estimates so you know exactly what to expect before the project begins.

How far out are you scheduling projects?

Our schedule can fill up quickly, especially during peak seasons. We recommend reaching out early, and we’ll always provide a realistic timeline upfront.

Will I know the full cost before work begins?

Yes, we provide detailed estimates and walk you through the scope of work so there are no surprises along the way.

What’s the best way to get in touch for a quote?

You can contact us directly through our website or by phone, and we’ll respond as quickly as possible to discuss your project.

“They did a wonderful job on our sidewalk! They showed up when they promised, did it in one day, and cleaned up after themselves! We could not be happier with the whole experience! Super nice people and first rate work!”

Virginia B.

“The contractors completed the job quickly and efficiently. They presented a better option to re-install the concrete sidewalk. Yet they allowed us to make that final decision of what we thought would look best for the property. In the end we were all happy with the outcome and the completing the job quickly.”

Shannon T.

“The team over here works great together and produces a fantastic product. Albert is great with communication and does what he says he’s going to do. Overall great company! They’ve done two new apartment complexes for me and 6 more to go!”

Jacob C.

Get started on your project. Schedule a free estimate today!

Unerstall Foundations & Flatwork Inc

Address

1673 Old Hwy 50 W
Union, MO 63084
Directions

Hours

Monday ‒ Friday
7:00 AM ‒ 5:00 PM