When storm water forces its way into a commercial medical facility, the stakes go far beyond a wet floor. Patient safety, sensitive equipment, and operational continuity all hang in the balance. At Hillcrest Medical Center in Tulsa, Oklahoma, our team was called in to solve a persistent water intrusion problem affecting sub-grade floors that sit below street level. The solution required a combination of exterior polyurethane foam injections and interior acrylic crack injections, two proven methods that eliminated the water infiltration and restored the facility to a dry, safe condition.
This commercial water intrusion repair in Tulsa is a strong example of how Level Structural, our commercial and civil division, approaches complex below-grade water problems in high-stakes environments.
Understanding the Problem: Storm Water Intrusion in Sub-Grade Floors
Hillcrest Medical Center is one of the largest healthcare campuses in the Tulsa metro area. Like many hospital facilities built on sloped terrain, portions of the building extend below street level. These sub-grade areas are particularly vulnerable to hydrostatic pressure during heavy rain events, which are common across eastern Oklahoma throughout spring and summer storm seasons.
The facility management team reported recurring water intrusion along the lower level floors. Each time a significant storm rolled through, water would seep through cracks and joints in the concrete walls and floor slabs. In a medical environment, even small amounts of standing water can create serious problems including mold growth, compromised sterile conditions, and potential damage to medical equipment.
Our team performed a thorough inspection and identified two primary pathways for water entry. First, voids and channels behind the exterior foundation walls were allowing water to travel along the outside of the structure and pool against the sub-grade surfaces. Second, hairline cracks in the interior concrete had opened enough to let pressurized water push through during heavy rain events.
Why Traditional Waterproofing Methods Fall Short for Commercial Facilities
Many commercial property managers initially consider surface-level solutions like interior sealants or basic drainage improvements when dealing with water intrusion. While these approaches can help manage symptoms, they rarely address the root cause in sub-grade applications where hydrostatic pressure is the driving force.
Excavating around a large commercial structure to apply exterior membranes is often impractical. For a working hospital, the disruption would be enormous. Shutting down access points, tearing up landscaping and parking areas, and working around utilities would create weeks of chaos in an environment where patient care cannot be interrupted.
That is exactly why injection-based repair methods have become the preferred solution for commercial structural repair projects where access is limited and downtime must be minimized.
Exterior Polyurethane Foam Injection: Sealing the Source
The first phase of our repair strategy focused on the exterior of the structure. Our team used polyurethane foam injection to fill voids and seal pathways along the outside face of the sub-grade walls.
Polyurethane foam is a closed-cell, hydrophobic material that expands after injection to completely fill voids, channels, and loose soil pockets. Once cured, it forms a rigid barrier that water cannot penetrate. Unlike open-cell foams or cementitious grouts, polyurethane foam actively repels water rather than absorbing it, making it ideal for below-grade applications where constant moisture exposure is expected.
Our crew drilled small injection ports through the exterior grade and injected the foam at calculated intervals along the sub-grade wall line. As the material expanded, it filled every gap between the soil and the foundation wall, cutting off the primary water migration pathways. The process was completed with minimal surface disruption, and the injection ports were patched flush with the surrounding grade.
How Polyurethane Foam Injection Works for Water Intrusion
The science behind polyurethane foam injection makes it particularly well suited for water intrusion applications. When the two-part resin is injected, it reacts and expands to several times its original volume. This expansion generates enough pressure to push into even the smallest voids and channels while remaining controlled enough to avoid damaging the surrounding structure.
For the Hillcrest Medical project, our team selected a formulation designed specifically for water cutoff applications. This particular foam has a higher density and faster reaction time compared to foams used for concrete lifting, allowing it to cure before groundwater can wash it away. The result is a permanent, waterproof barrier that bonds to both the foundation wall and the surrounding soil.
Interior Acrylic Crack Injection: Stopping Water at Every Entry Point
While the exterior foam injection addressed the primary water pathways, our team also needed to seal the interior cracks that had allowed water to push through the floor slabs and walls. For this phase, we used chemical acrylic crack injection, a technique that works from the inside out to create flexible, watertight seals within the concrete itself.
Acrylic injection resins are specifically engineered for crack repair in concrete structures where water is actively present. Unlike rigid epoxy injections, acrylic resins remain flexible after curing, which means they can accommodate the minor thermal expansion and contraction cycles that all concrete structures experience without losing their seal.
The Acrylic Crack Injection Process
Our technicians began by mapping every visible crack on the interior sub-grade surfaces. Each crack was cleaned and fitted with injection ports spaced at regular intervals along its length. The acrylic resin was then injected under controlled pressure, starting at the lowest point of each crack and working upward to ensure complete penetration.
As the resin traveled through the crack, it filled the entire void from the interior surface all the way through to the exterior face of the concrete. In areas where active water flow was present during the injection, the acrylic resin reacted with the water to form a gel that expanded and cured in place, effectively chasing the water back out and sealing the pathway behind it.
This ability to react with active water is what makes acrylic injection the go-to method for crack repair in wet environments. Epoxy injections require dry conditions to bond properly, but acrylic resins thrive in the presence of moisture.
Why the Combination Approach Delivers Superior Results
Using polyurethane foam injection and acrylic crack injection together creates a layered defense system that addresses water intrusion from multiple angles. The exterior foam barrier reduces the volume and pressure of water reaching the foundation, while the interior crack injections seal every remaining entry point at the concrete surface level.
This dual approach is especially important in commercial water intrusion repair where the consequences of failure are severe. A hospital cannot afford recurring leaks that compromise patient areas, mechanical rooms, or data infrastructure. By attacking the problem from both sides, Level Home ensures that the repair is comprehensive and long lasting.
Our experience with commercial projects across Tulsa, including work at Saint Francis Health System and the Tulsa Firefighters Credit Union, has shown that combination approaches consistently outperform single-method repairs in complex below-grade environments.
Challenges of Working in an Active Medical Facility
Every commercial project differs from residential work in terms of logistics, but hospitals present an additional layer of complexity. Our crew coordinated closely with Hillcrest Medical Center’s facilities management team to schedule work during periods that minimized impact on patient care areas.
Noise, dust, and chemical odor control were all critical considerations. Polyurethane foam injection and acrylic crack injection are both low-disruption methods, which made them ideal for this environment. There was no need for heavy excavation equipment, jackhammers, or large-scale demolition. The injection rigs are compact and relatively quiet, and the materials cure quickly with minimal off-gassing.
The interior crack injection work was completed in sections, allowing hospital staff to maintain access to adjacent areas throughout the project. Each section was inspected and cleared before our crew moved to the next, ensuring that no area was left exposed or unsafe.
The Role of Drainage in Long-Term Water Management
While injection-based repairs are highly effective at sealing active water intrusion, Level Home always evaluates the broader drainage conditions around a structure as part of our assessment. Water intrusion is often a symptom of larger site drainage issues that, if left unaddressed, can create ongoing hydrostatic pressure against sub-grade surfaces.
At Hillcrest Medical Center, our team reviewed the existing surface drainage, grading, and stormwater management systems surrounding the affected areas. We provided the facilities team with recommendations for perimeter drainage improvements that would further reduce the volume of water reaching the foundation walls during heavy storms. Combining injection repairs with proper drainage management creates the most durable long-term solution.
Sub-Grade Water Intrusion: A Common Challenge for Tulsa Commercial Properties
Tulsa’s geography and climate create ideal conditions for sub-grade water intrusion in commercial buildings. The region sits on clay-rich soils that expand when saturated and contract during dry periods. This constant soil movement opens cracks in foundation walls and slabs, and the heavy seasonal rainfall provides plenty of water to exploit those openings.
Commercial properties with below-grade spaces, including hospitals, parking garages, office buildings, and retail centers, are particularly at risk. Many of these structures were built decades ago when waterproofing standards were less rigorous, and the original barrier systems have often deteriorated over time.
Level Home has seen a significant increase in demand for commercial water intrusion repair across the Tulsa metro area. Property owners and facility managers are recognizing that injection-based solutions offer a cost-effective, minimally disruptive alternative to traditional excavation and membrane systems.
Cost and Timeline Advantages of Injection-Based Water Intrusion Repair
One of the most compelling reasons to choose polyurethane foam injection and acrylic crack injection over traditional methods is the dramatic reduction in project cost and timeline. Excavation-based waterproofing for a commercial structure can take weeks and cost tens of thousands of dollars in site restoration alone.
Injection-based repairs are typically completed in days rather than weeks. The Hillcrest Medical project was finished on schedule with minimal disruption to hospital operations. The materials are injected through small ports that are easily patched after the work is complete, leaving no visible evidence of the repair on either the interior or exterior surfaces.
For commercial property owners evaluating their options, we encourage scheduling a free inspection so our team can assess the scope of the problem and provide a detailed repair plan and estimate.
What Sets Level Home Apart for Commercial Water Intrusion Projects
Level Home Foundation Repair, through our Level Structural division, brings a unique combination of residential precision and commercial scale capability to every project. Our team is experienced with polyurethane foam systems, acrylic and epoxy injection methods, helical and steel pier systems, and comprehensive drainage solutions.
We work directly with facility managers, general contractors, and structural engineers to develop repair plans that meet the specific requirements of each project. Whether the challenge is water intrusion in a hospital, settlement in a warehouse, or structural support for new construction, Level Home has the equipment, materials, and expertise to deliver a lasting solution.
Schedule Your Commercial Water Intrusion Assessment
If your commercial property in Tulsa or the surrounding area is experiencing water intrusion through sub-grade floors or walls, Level Home can help. Our team will conduct a thorough inspection, identify all water entry pathways, and recommend the most effective combination of injection and drainage solutions for your situation.
Call us at (918) 361-7787 or contact us online to schedule your assessment. We serve commercial and residential clients throughout Tulsa and the surrounding communities.
Frequently Asked Questions
Polyurethane foam injection is a repair method where closed-cell, hydrophobic foam is injected into voids and channels along the exterior of a foundation wall. The foam expands to fill gaps between the soil and the structure, creating a permanent waterproof barrier that prevents storm water from reaching the foundation surface. It is commonly used for commercial water intrusion repair in sub-grade applications.
Acrylic crack injection involves pumping a flexible acrylic resin into cracks in concrete walls or floor slabs. The resin fills the crack from the interior surface through to the exterior face, creating a watertight seal. Unlike epoxy, acrylic resin can cure in the presence of active water, making it ideal for repairing leaking cracks in sub-grade commercial structures.
Most commercial water intrusion repairs using polyurethane foam injection and acrylic crack injection are completed in a matter of days rather than weeks. The exact timeline depends on the number of water entry points and the size of the affected area. Injection-based methods are significantly faster than traditional excavation and membrane waterproofing.
Yes. Polyurethane foam injection and acrylic crack injection are both low-disruption methods that produce minimal noise, dust, and odor. Our team regularly performs these repairs in active commercial facilities, including hospitals and medical centers, by coordinating with facility management to schedule work in sections.
The cost of commercial water intrusion repair varies based on the number of injection points, the severity of the water intrusion, and the accessibility of the affected areas. Injection-based repairs are generally more affordable than excavation methods because they require less labor, equipment, and site restoration. Contact Level Home at (918) 361-7787 for a free inspection and detailed estimate.
