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Uneven Pool Deck2026-11-02T16:00:14-06:00

Uneven Pool Deck Repair: Causes, Signs & Solutions

Whether your pool deck has shifted after years of seasonal weather swings or soil movement in the NV Waterproofing and Foundation Repair area, an uneven pool deck is more than a cosmetic issue. Uneven concrete around water creates trip hazards, drainage problems and real liability concerns. The good news is most pool decks can be repaired—not replaced—with PolyLevel®, restoring a safer, more level surface in just a few hours.

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Symptoms

Common Signs Your Pool Deck Needs Repair

A sinking pool deck can look like a cosmetic issue at first, but it usually points to unstable soil beneath the concrete. As the deck settles further, small shifts become drainage issues, bigger cracks and dangerous trip hazards on a surface that's already slick. If you can stub a toe or catch a shoe on it, it's a fall risk—and a liability risk. Recognizing the signs early helps you address the problem before it becomes more extensive—or more expensive—to repair.

Settlement Around the Pool Coping
Deck Pitched Toward the Pool
Cracking Deck Slab
Settled Deck Near the Diving Board or Ladder
Standing Water on the Deck
Spalling and Surface Damage

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Causes

What Causes a Pool Deck to Settle and Become Uneven?

Throughout [Target Location], local soils and seasonal weather patterns can accelerate pool deck settlement. Because pools sit in backfilled soil, the concrete around the pool is especially prone to movement over time. Pinpointing what's behind the settlement is the first step toward the right repair.

  • Soil Movement & Settlement

    Backfilled soil around the pool compacts naturally over time, leaving the concrete without the support it relies on.

    After a pool goes in, the excavated space around the shell is backfilled. Even when properly compacted, this soil continues to settle over the years. As voids develop beneath the concrete, sections of the pool deck begin to sink while the pool shell remains stable. Because the problem starts below the surface, lifting the slab and restoring support is often more effective than replacing the concrete.

  • Washout & Water Erosion

    Splash-out, irrigation and rainfall can wash away soil beneath the deck, creating voids that lead to settlement.

    Water is one of the biggest factors behind a sinking pool deck. Routine splash-out, overflowing planters, sprinklers and heavy rain saturate the surrounding soil and slowly wash away fine particles. As the voids expand, the concrete loses its support and begins to crack, settle, or tilt. That’s why waterproof, closed-cell polyurethane foam is especially effective for pool deck lifting.

  • Freeze & Thaw Cycles

    Shifting seasonal temperatures cause the soil under your pool deck to expand and contract year after year.

    As moisture in the soil freezes, it expands and pushes the concrete upward. As the ground warms, the soil contracts, often leaving voids beneath the slab. Season after season, freeze-thaw cycles weaken the soil’s ability to support the deck, leading to uneven settlement, cracks and trip hazards over time.

  • Settling Around the Pool Edge

    The concrete along your pool edge is usually the first area to sink since it’s built on backfilled soil.

    As settlement continues, gaps can form between the concrete and the coping, creating trip hazards and raising concerns about damage to the pool. Usually the pool shell remains stable and only the surrounding deck has shifted, which makes lifting and leveling an effective repair.

Why You Shouldn't Ignore an Uneven Pool Deck

  • Small Changes Become Bigger Safety Hazards

    A slight change in elevation might not seem like a big deal at first, but uneven concrete around a pool can turn into a serious trip hazard fast. Because wet surfaces reduce traction, even small lips or settled sections become more dangerous for family members and guests.

  • Water Accelerates the Problem

    As the pool deck keeps settling, water stops draining the way it was intended. Pool splash-out, rain and irrigation can collect in low spots or seep beneath the slab, washing away additional soil and creating even more settlement. In [Target Location], seasonal weather conditions can accelerate this process, letting the deck keep shifting over time.

  • Acting Early Helps You Avoid Replacement

    Catching a sunken pool deck early often means the existing concrete can be repaired instead of replaced. As settlement progresses, cracks widen, elevation changes increase and repairs become more extensive. Correcting the underlying soil problem early is usually faster, less disruptive and more affordable than a full replacement.

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NV Waterproofing and Foundation Repair’s Answer for Uneven Pool Decks

In many cases, a sunken pool deck can be repaired instead of replaced. Since settlement usually comes down to unstable soil—not failed concrete—NV Waterproofing and Foundation Repair restores the support beneath the slab instead of tearing out the existing deck. With the PolyLevel® concrete lifting and leveling system, NV Waterproofing and Foundation Repair fills voids below the settled concrete, stabilizes the underlying soil and gradually lifts the slab back toward its original position. Because PolyLevel® is installed under the deck—not against the pool shell—it makes for a safe, precise repair with minimal disruption and no tear-out. In most cases, homeowners can leave the pool full throughout the repair.

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  • PolyLevel® Concrete Lifting

    PolyLevel® uses waterproof, closed-cell polyurethane foam to fill voids beneath a sunken pool deck, stabilize the supporting soil and lift and level the existing concrete. Most repairs wrap up in a few hours, with the deck ready to use the same day.

How It Works

NV Waterproofing and Foundation Repair’s Pool Deck Lifting Process

Step 1

Free Inspection & Tailored Plan

Every project begins with a thorough inspection of your pool deck and the supporting soil. We’ll diagnose what’s causing the settlement, determine whether your pool deck can be lifted instead of replaced, review your repair options and recommend the best solution for your property.

Step 2

Targeted Foam Injection

Small, penny-sized holes are drilled into the affected pool deck, allowing PolyLevel® polyurethane foam to be injected beneath the slab. The foam goes under the concrete—not against the pool shell—making the repair safe and minimally invasive.

Step 3

Fill Voids & Stabilize the Ground

While the foam expands, it fills voids beneath the slab and restores the support the concrete lost. The closed-cell foam helps stabilize the underlying soil and resists water intrusion from pool splash-out, groundwater and seasonal weather.

Step 4

Raise & Level the Pool Deck

The expanding foam carefully lifts the settled concrete back toward its original position, helping eliminate trip hazards, improve drainage, reduce uneven gaps around the pool coping and restore a safer walking surface.

Step 5

Quick Cure & Ready to Use

PolyLevel® cures in about 15 minutes, which means most pool decks return to normal use the same day. Unlike a full replacement, there’s no lengthy demolition, no weeks of curing time for new concrete and, in most cases, no need to drain the pool.

Benefits

Why Homeowners Trust NV Waterproofing and Foundation Repair

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Don't just take our word for it

See what our customers have to say about our work.

NV Waterproofing was extremely responsive and 100% committed to identifying our water problem and designing a solution. Their work was excellent. The crew was on time and organized. They were very careful to protect the exterior landscaping and the interior of our home from dirt and debris. Even two years later, they responded to a sump problem at no additional charge. NV Waterproofing does the job right and stands behind its work.

Mike and Lynn F. | Columbia, MD

We bought a house in a state of disrepair, and so we've had to work with a number of contractors. I'd rank this company at the top of the list for their professionalism, knowledge, experience, and honesty. We had bowing of our basement walls that needed to be addressed. Michael came out to assess the situation, and gave us some options. After speaking with him, I felt very confident in their ability to buttress our walls. It was also a huge bonus that we were able to set up a payment plan for this job too. When the team showed up, Casey, Kevin, and Grant, they were super polite and professional. They took great care of our property, and if they had a question about anything, they asked. Also, if I had a question, Casey (the foreman), was very knowledgeable and quick to answer. They presented the work as they progressed through the job, and really, I was actually a little blown away by the scale of the project, and the speed at which they worked. What an impressive job they did! We're very confident in the work they did and will hire them again.

Ellen M.  | Takoma Park, MD

We were referred to NV Waterproofing from my brother-in-law who used them and was pleased. They came out and gave us an estimate - they were very prompt. We had the work done - it looked great and I am sure will do the job (only time will tell). We did have a miscommunication with the work (mostly on our part), but the owner had it fixed promptly and without additional cost. I would highly recommend them to anyone with water issues in their basement.

Susan C. | Washington DC, DC

NV stuck with me and made sure I was happy. Roberto Jr kept me calm as my problem persisted and kept working on a solution beyond the obvious. I highly recommend. Looking forward to a dry basement this summer.

Dean R. | Washington, DC

I am writing this letter to commend members of your organization for the waterproofing work performed on and around the foundation of my house. Despite situations beyond the control of both me and your associate, he always maintained professionalism and demonstrated why he is an outstanding representative of your organization. The crew obviously knew what had to be done and went about doing it. They were prompt in arriving at work each day, diligent in the performance of their duties (in spite of high heat and humidity), and took measures to ensure the safety around the excavated area (important because of children in the neighborhood). Unlike other construction sites I have seen, the crew maintained the area free of litter— no small measure these days! In addition, the crew always provided clear explanations of the work to be done each day, answering the questions with forthright and clear responses, never hurrying the discussion. As I was not on site while work was being done, they called me several times, taking those extra steps to keep me informed of the status of the work and aware of the tasks yet to be performed— something that is greatly appreciated. I would appreciate it if you would offer my heartfelt thanks to your able crew for the quality waterproofing work performed and the excellent communication and coordination exhibited by them.

Myra L. | Washington, DC

In my 12 years of having NV Waterproofing as a business partner, they have always proved reliable and trustworthy. They are a great value for me and my customers.

Darryl O. of Brookfield Homes, | Washington, DC

Great professional service and able to respond in timely manner to the project need.

Blake B. | Washington, DC

Brendan was very knowledgeable, professional and courteous. Highly recommend.

Cesar T. | Arlington, VA

A brief note to thank NV Waterproofing for extreme professionalism and courtesy in the manner in which my recent basement water seepage problem was addressed. From the initial contact with Jim, through the work with Roberto, Carlos and Jose, it was an overall pleasant experience – not to mention my contact with the owner and his responsiveness.

Ramesh T. | Arlington, VA

These guys were amazing. The initial visit was smooth, not pushy at all and he was even able to accommodate the relocation of a small drainage pipe. The demo to install the system was done beautifully, yes it was really good, you can tell they were precise and careful when doing so. Everything was clean, no stains on my carpet and they protected everything. No leak so far and I love it. Did I mention the price was excellent? I had 3 other companies to estimate thousands and even tried to sell extra unnecessary equipment. Thank you NV Waterproofing I have and will continue to recommend you.

Chelly Z. | Falls Church, VA

We appreciated NV Waterproofing's honesty and the men who worked tirelessly in uncomfortably cold weather. We've had one big storm since they finished and the basement walls are nice and dry. Nice work!

Peter V. | Falls Church, VA

Mauricio and Cristian were the initial sales reps who came to examine the issue and they took the time to test drainage that might have potentially been creating the water issue. They offered a reasonable solution (sealing the visible cracks and holes in the concrete) and I was contacted within a couple of days with an estimate and scheduling options. Sean was our tech and he did a fantastic job diagnosing the issue beyond just the cracks. He not only address all the holes and cracks in the concrete and mortar, he sealed up additional entry points above the foundation. He sourced additional materials to cover openings for cable lines. He went above and beyond and gave us measured information on how we should continue to monitor and treat this area as the house settles. He was thorough, informative, and provided excellent service in his work. I'm very glad that Sean was the technician sent to us and I would specifically request him for your projects.

Sara T. | Falls Church, VA

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Before & after photos

Check out before and after photos from some of our completed projects.

  • Sunken Concrete Step Repair in Stephens City, VA

    This Stephens City, VA homeowner was dealing with a sunken concrete front step that had settled over time, creating an uneven entryway and a noticeable tripping hazard near the front door. Sunken concrete steps can make everyday foot traffic unsafe for homeowners, guests, and delivery drivers, while also taking away from the home’s curb appeal. Our concrete repair team lifted and leveled the front step back to its proper position, creating a safer, more stable walkway and entrance. This concrete step repair helped reduce the risk of falls, improved the look of the front entry, and gave the home a cleaner, more welcoming appearance. The homeowner was thrilled with the outcome — a big transformation that improved both safety and curb appeal!

  • Basement Waterproofing in Winchestor, VA

    A homeowner in Winchester, VA, was struggling with a failing sump pump that couldn’t keep up during heavy rainstorms, leaving their basement vulnerable to water intrusion. The lack of a reliable backup system also left them worried about potential flooding during power outages. Frustrated and seeking a dependable solution, they contacted NV Waterproofing and Foundation Repair, a trusted basement waterproofing company in Winchester, VA.

    After assessing the situation, we replaced their old sump pump with a state-of-the-art TripleSafe Sump Pump system. This advanced system includes three levels of protection: a primary pump, a secondary pump for heavy water flow, and a battery backup to ensure the basement stays dry even during power outages. The homeowner now has peace of mind knowing their basement is fully protected, no matter the weather.

  • Pool Deck Leveling in Manassas, VA

    A homeowner in Manassas, VA, quickly realized their dream backyard pool was at risk when the surrounding concrete pool deck began to show serious problems. Uneven and sunken slabs created tripping hazards and unsightly cracks, making both safety and aesthetics a challenge for anyone using the space. Additionally, water from rain and pool use was pooling in low spots, causing slippery surfaces and further soil erosion beneath the deck. These issues not only threatened the safety of family and guests but also compromised the value and enjoyment of the home.

    Seeking an effective solution, the homeowner reached out to our team for a professional assessment. We identified the main cause of settlement: soil erosion under the slabs—a common issue in Manassas due to its clay-rich ground and fluctuating moisture. To address both the immediate hazards and prevent future damage, we recommended our two-part approach: the cutting-edge PolyLevel® concrete leveling system and NexusPro® Joint Sealant.

    The repair process began with drilling small holes into the affected concrete slabs, allowing us to inject high-strength PolyLevel® polyurethane foam beneath the surface. As the foam expanded, it filled voids, stabilized the soil, and gently lifted the slabs back to their original positions. The process was quick, clean, and minimized disruption, giving the pool deck a level, safe surface once again. PolyLevel® foam is waterproof and lightweight, reducing the risk of future settling and ensuring long-term durability, even in a wet poolside environment.

    To provide further protection, we sealed all cracks and joints with NexusPro® Joint Sealant. This flexible, weather-resistant sealant prevents water from seeping beneath the slabs, protecting the soil and concrete from additional erosion. The result was a clean, finished appearance that not only improved the look of the deck but also safeguarded it for years to come.

    Thanks to modern concrete leveling technology, the homeowner’s pool deck was transformed from a liability into a safe and attractive outdoor gathering space. The project was completed in a single day, with minimal mess and immediate results, giving the homeowner peace of mind and renewed pride in their backyard. If you’re facing similar issues with your pool deck in Manassas, VA, the PolyLevel® system and NexusPro® Joint Sealant offer a fast, effective, and lasting

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Frequently Asked Questions

Does an uneven pool deck need to be replaced? 2026-10-05T13:28:24-05:00

Usually not. As long as the concrete is structurally sound, an uneven or sunken pool deck can often be lifted and leveled with PolyLevel® instead of being torn out and replaced. Because the underlying problem is typically unstable soil—not failed concrete—rebuilding the support under the slab is usually faster, less disruptive and more cost-effective than replacement. 

How long does pool deck lifting take? 2026-10-05T13:27:24-05:00

Most residential pool deck lifting projects wrap up in a single visit, often within a few hours, though larger decks may take a full day. Following the final PolyLevel® injection, the concrete is typically ready for foot traffic within about 15 minutes and normal use the same day. Replacement can take weeks, making lifting a significantly faster option. 

Is PolyLevel® safe around pool water and chemistry? 2026-10-05T13:26:26-05:00

Yes. PolyLevel® is a closed-cell polyurethane foam: waterproof, chemically inert and unaffected by chlorine, saltwater systems or standard pool chemistry. It won’t soak up water, erode from repeated splash-out or deteriorate over time like traditional mudjacking materials, which makes it an ideal solution for long-lasting pool deck leveling. 

Do you have to drain the pool to repair the deck? 2026-10-05T13:25:55-05:00

No. Most of the time, your pool can stay full while the deck is lifted, because PolyLevel® is installed from above through small injection holes in the concrete. A full pool deck replacement often requires draining the pool for demolition and repouring, while lifting minimizes disruption so you can get back to enjoying your pool much sooner. 

Will lifting my pool deck damage the pool shell? 2026-10-05T13:25:16-05:00

No. PolyLevel® is injected beneath the concrete pool deck—not against the pool shell. The expanding polyurethane foam fills voids beneath the slab and raises the concrete from underneath instead of pushing laterally toward the pool. Experienced crews carefully plan injection points to keep pressure away from the pool shell and coping, delivering a controlled lift without disturbing the structure. 

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