Property Type: Single‑family residence with in‑ground pool and cast‑in‑place concrete deck
Location: Melbourne, FL (Brevard County)
Owner Objectives:  

1. Stop settlement forces at the pool deck by stabilizing the soils (void fill and densification).
2. Restore slab contact to reduce trip edges and stress at control joints.
3. Attempt concrete lifting only where feasible and prudent; avoid over‑correction that could crack finishes.
4. Keep the pool area safe, clean, and accessible throughout the process. 

Pre‑Work Indicators:  

– Hairline to moderate cracking across sections of the deck.
– Localized panel settlement is most noticeable near edges and corners.
– Hollow response on percussion testing, indicating voids beneath certain panels. 

Likely Contributors: Florida pool decks commonly experience support loss due to variable backfill, periodic moisture swings (irrigation and rainfall), washout toward the shell, and organics decay from former landscaping. These mechanisms undermine the near‑surface “influence zone” that directly supports slabs. 

Pool decks are rigid surfaces that rely on a shallow bearing layer. When that layer loses density, slabs begin to bridge, and cracks develop from tension and differential movement. This project presented three constraints that shaped the plan: 

1. Lift vs. stabilization. The owner asked about concrete lifting, but a full return to original elevation would have required underpinning in addition to injections. Underpinning was not in scope, so our acceptance criteria emphasized stabilization first, with modest, safe corrections only where the slab responded uniformly.
    
2. Occupied amenity. The pool deck needed to remain as accessible as possible. The solution had to be non‑demolition, low‑footprint, and quick‑curing.
    
3. Edge effects. Deck edges adjacent to the shell can see washout or cantilevering over small voids. Injections had to be metered and sequenced to re‑couple soils without over‑pressurizing the slab or shell interface. 

Helicon deployed a two‑tier strategy using two‑part structural polyurethane injections, purpose‑built for soil stabilization and slab support. 

1) Soil Injections

We placed 300 pounds of foam at 15 mapped injection points along the perimeter and influence zones. The foam, injected via probes into the shallow bearing layer, flows to low‑resistance pathways—voids, loose pockets, and channels—before expanding to lock grains together. This re‑couples the soil matrix, increases near‑surface stiffness, and reduces the risk of renewed settlement. 

Why it matters: Slabs don’t stay level if the soil below is weak. Treating the soils first provides a stable platform for any subsequent contact restoration or minor elevation corrections. 

2) Slab Injections 

At the slab interface, we delivered 287 pounds of foam across 533 square feet of deck panels to fill residual voids and restore slab‑to‑soil contact. Technicians used short, metered shots and watched joints, edges, and transitions to avoid over‑correction. Because underpinning was not part of this project, any concrete lifting was limited to small corrections where the slab response was uniform and safe.  

Because underpinning was not part of this project, any concrete lifting was limited to small corrections where the slab response was uniform and safe. 

Why two‑part polyurethane:  

– Lightweight: Adds minimal dead load versus cementitious fills.
– Fast cure: Returns areas to light service in minutes, not days.
– Small ports: Penny‑sized holes mean minimal patching and clean aesthetics.
– Moisture‑tolerant & inert: Stable in Florida’s humid, rain‑intense environment once cured. 

Results & Benefits

• Void closure & re‑support: Soil injections closed hidden voids and increased density, while interface injections restored contact beneath the deck panels.

• Reduced trip risk: With support re‑established and minor adjustments made, joints and edges became more predictable, easing transitions for foot traffic and furniture.

• Stability prioritized: By addressing the soil stabilization first, the deck now rests on a uniform bearing layer, reducing the likelihood of continued cracking or differential movement.

• Low disruption: No demolition. Small ports, rapid cure, and tidy housekeeping kept the amenity accessible and the yard intact.

• Florida‑ready durability: The foam is inert after cure and resists moisture, making it well suited to Brevard County conditions. 

Why “Stabilize First, Lift Second”

“Perfectly level” is not sustainable if the soils beneath are not stable. The correct sequence is: 

1. Stabilize soils → fill voids, tighten the near‑surface matrix, and re‑establish slab contact.
    
2. Lift carefully → make small, controlled corrections only where behavior is uniform and safe. 

This approach protects finishes, avoids over‑correction, and delivers the most durable performance for pool decks in sandy Florida backfills.

Homeowner FAQs (Pool Deck Edition)

Can you lift my pool deck back to “as‑new” level?
Not always. Without underpinning, lift potential is limited to modest, safe corrections. Our priority is permanent stabilization; elevation recovery is pursued only when the slab and soils respond uniformly. 

How long will the repair last?
Two‑part polyurethane is inert after cure. Longevity depends on drainage, loading, and keeping cap/joint sealants maintained to limit water intrusion. 

Will the injections damage plumbing or lights?
We map and respect conduits and use short, metered shots to control pressure. The goal is contact restoration without forcing material into conduits. 

Will I see the injection ports?
Ports are small and patched at completion. They blend with typical deck maintenance. 

Care & Maintenance (Keep It Stable)

• Manage runoff: Ensure downspouts and deck drainage route water away from slab edges.

• Seal joints: Keep control joints and cap sealants maintained to limit water ingress and fines migration.

• Inspect after storms: Walk the perimeter after major rain events; note new damp spots, settling, or widened cracks early.

• Furniture loads: Distribute heavy items (grills, planters) to avoid point‑loading at slab edges.

• Call early: Small voids are faster and less costly to treat than major sink‑outs. 

About Helicon

Helicon is Florida’s trusted partner for soil stabilization, concrete lifting, foundation repair, and sinkhole remediation. We serve homeowners across Brevard County and the Space Coast, delivering engineered, minimally disruptive solutions that protect your property for the long term. 

Seeing cracks or soft spots around your pool deck in Melbourne, Viera, or Palm Bay? Helicon’s soil stabilization and concrete lifting methods close voids, restore support, and deliver durable performance—often in one day. Call 844‑HELICON to schedule a free inspection and get a plan tailored to your home.