Symptoms Reported by Owner:

• Surface erosion near the rear porch
• Settlement presenting as subtle elevation changes at the porch and adjacent slab
• Hairline stair‑step cracks at CMU side walls

Homeowner Goals:

1. Stop the soil loss and stabilize the near‑surface bearing layer.
2. Re‑establish contact beneath the porch slab to reduce the risk of additional settlement.
3. Prioritize stability over aggressive concrete lifting to avoid stressing finishes.
4. Keep the process non‑invasive with minimal disruption and rapid cure.

Three realities shaped the design and acceptance criteria: 

1. Crack width limited lift value. The hairline nature of the stair‑step cracks meant lifting wasn’t likely to visibly close them without risking new cosmetic damage elsewhere. The correct approach was to stabilize the soil mass and arrest movement, not chase cosmetic closure.
2. Near‑surface mechanism. Field sounding and site history pointed to a shallow influence zone problem—loss of support due to voids, erosion, and inconsistent backfill near the porch.
3. Occupied‑home logistics. The owner requested a clean, same‑day solution with small access points and tidy housekeeping—an ideal fit for polyurethane soil stabilization and slab injections.

Structural Polyurethane Foam (Soil + Slab) 

Helicon deployed a two‑tier injection plan using two‑part structural polyurethane, a moisture‑tolerant, fast‑curing foam engineered for foundation repair and slab support. 

 1. Soil Injections

• Zone A (localized void): 4 points totaling ~80 lbs to intercept and close a distinct void.
• Zone B (extended influence line): 29 points totaling ~1,450 lbs to treat a longer run where soils tested loose and voided at depth. 

How it works: Low‑viscosity resin follows low‑resistance pathways (voids and loose pockets) and then expands to lock grains together, creating a soil‑foam matrix that restores uniform bearing—without the added dead load of cementitious fills. 

2. Slab Interface Injections  

• Interface phase: ~101 lbs of foam at the slab interface beneath the porch footprint and transitions.
• Objective: Re‑establish slab‑to‑soil contact and perform gentle, measured corrections only where the slab responded uniformly, prioritizing finish protection over aggressive lift. 

Why this material:

• Lightweight structural support limits the risk of creating new settlement drivers.
• Rapid cure allows same‑day operability.
• Penny‑sized ports keep the process clean and minimally visible.
• Moisture‑tolerant & inert chemistry suits Florida’s climate and near‑surface moisture swings. 

Results & Benefits 

• Stability achieved: The porch and adjacent slab lines now bear on a uniform, densified soil platform, reducing the risk of continued settlement.
• Crack drivers addressed: With soil stabilization complete and slab contact restored, the forces that propagate stair‑step cracking have been dramatically reduced; cosmetic repairs can proceed on a stable substrate.
• Low disruption: No excavation spoils, minimal noise, and same‑day return to routine use.
• Florida‑ready durability: Once cured, polyurethane is inert and resists moisture—well-suited to Seminole County’s rainfall and irrigation cycles.
• Documented scope: Injection logs (points and pounds) and a post‑work summary support the homeowner’s records, insurance, or resale documentation. 

Why Stabilize Before You Lift 

“Perfectly level” is a tempting goal, but level on loose soil won’t stay level. The durable sequence is: 

1. Stabilize soils → close voids, densify the matrix, and rebuild reliable contact.
2. Restore contact → ensure the slab bears uniformly across its footprint.
3. Lift carefully (if indicated) → pursue micro‑corrections only where the structure responds uniformly and finishes can tolerate movement. 

This approach protects finishes, avoids over‑correction, and keeps performance front‑and‑center. 

Homeowner FAQs  

• Can you guarantee my cracks will disappear?
  • No. These were hairline cracks; chasing visual closure via lift can create new cosmetic issues. Our priority is to stop the movement so you can perform cosmetic repairs with confidence.
    
• How long will the stabilization last?
  • Two‑part polyurethane is inert after cure. Longevity depends on drainage and loading. With good downspouts, grading, and joint maintenance, results are long‑lasting. 
• Will there be a mess or a strong odor?
  • Ports are small and patched; dust is contained at the source; any curing odor dissipates quickly with ventilation.
• Could we add concrete lifting later?
  • Yes. Because the system is modular, we can extend injections or attempt gentle lift later—now on a stable base—if conditions and finishes allow. 

Care & Maintenance 

• Drainage discipline: Keep gutters clean; extend downspouts 5–6 feet away from the foundation; maintain a positive slope.
• Irrigation balance: Avoid chronic saturation at the perimeter; adjust timers to prevent ponding.
• Backfill hygiene: Don’t bury organics (mulch, roots) near slab edges; decaying organics create voids.
• Joint management: Maintain caulking at slab/foundation interfaces and control joints to limit water ingress and fines migration.
• Seasonal check‑ins: Photograph repaired areas quarterly the first year; call if notable changes appear. 

About Helicon 

Helicon is Florida’s trusted partner for foundation repair, soil stabilization, concrete lifting, and sinkhole remediation. We serve homeowners across Seminole County and Greater Orlando, delivering engineered, minimally disruptive solutions that protect property for the long term.
Seeing erosion, settlement, or stair‑step cracks in Lake Mary, Longwood, or Sanford? Helicon’s polyurethane soil stabilization and slab injection programs fill voids, restore support, and protect finishes—often in a single mobilization. Call 844‑HELICON to schedule a free inspection.