Family-owned and operated since 2000, Complete Basement Systems (CBS) is proud to be Long Island’s longest-standing basement and crawl space repair company. For more than 25 years, we’ve helped homeowners protect their most valuable investment by preventing water and humidity damage. Our consultative approach sets us apart—we don’t just fix problems, we educate homeowners and deliver tailored solutions designed for lasting peace of mind.
Founded in 1984, PTS Foundation Supply (PTSFS) has been the Northeast’s go-to resource for helical piles, driven anchors, and installation equipment. From design to installation, we know how complex foundation projects can be. That’s why professionals across the region count on our 100+ years of collective experience to provide reliable products, expert insight, and a partnership that helps every project start—and finish—on solid ground.
Since 1973, Premium Technical Services (PTS) has been the Tri-State area’s trusted partner in foundation repair, below-grade waterproofing, and grouting. With more than 50 years of service and over 100 years of combined expertise on our team, we bring proven solutions to keep your foundation strong, dry, and secure for the long run.
Family-owned and operated since 2000, Complete Basement Systems (CBS) is proud to be Long Island’s longest-standing basement and crawl space repair company. For more than 25 years, we’ve helped homeowners protect their most valuable investment by preventing water and humidity damage. Our consultative approach sets us apart—we don’t just fix problems, we educate homeowners and deliver tailored solutions designed for lasting peace of mind.
Founded in 1984, PTS Foundation Supply (PTSFS) has been the Northeast’s go-to resource for helical piles, driven anchors, and installation equipment. From design to installation, we know how complex foundation projects can be. That’s why professionals across the region count on our 100+ years of collective experience to provide reliable products, expert insight, and a partnership that helps every project start—and finish—on solid ground.
Permeation Grouting Foundation Repair Services
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Now one team with expanded capabilities: Complete Basement Systems (CBS) and Premium Technical Services (PTS) have combined to make it easier to find the right solution for your structure. PTS provides engineered, commercial, and industrial geotechnical solutions, including permeation grouting, across the New York City metro area.
From Midtown high-rises and waterfront facilities to transit corridors and utility corridors, PTS is a leading regional expert in permeation grouting for below-grade stabilization, groundwater control, and structural reinforcement. We partner with property owners, engineers, and contractors to design and execute solutions that protect assets, minimize disruption, and keep critical infrastructure operational.
What Is Permeation Grouting?
Permeation grouting is a ground improvement technique that injects a low viscosity grout into the soil matrix to reduce soil permeability, stabilize soil, and fill voids - without meaningfully changing the soil’s volume or structure. The grout travels through the natural pore spaces between particles (rather than fracturing the ground), making it ideal for loose soils and granular soils where you want to strengthen and seal the ground while preserving existing load paths, utilities, and nearby structures.
- Targeted access: Small injection points are drilled to the treatment depth.
- Controlled injection: A cementitious or chemical grout with carefully tuned viscosity and gel time is injected at controlled pressures so it permeates pore spaces.
- Matrix improvement: The grout cures within the soil matrix, decreasing permeability, increasing shear strength, and improving support - stabilizing soil without bulk displacement.
Applications of Permeation Grouting
Permeation grouting is suited to sands, gravels, and other granular soils where grout can permeate and fill cracks and empty spaces. In the New York metro, typical applications include:
- Foundation support for existing structures - Stabilize soil beneath footings, mats, and slabs; prevent additional settlement; and improve bearing capacity ahead of load increases or equipment installation
- Groundwater control in tunnels and excavations - Underpin existing structures, prevent erosion, create a barrier for groundwater mitigation, and precondition soils before excavation to prevent collapse
- Infrastructure stabilization (bridges, roads, pipelines) - Reinforce approach slabs, abutment soils, and utility corridors; mitigate washout; reduce differential movement under dynamic loads
- Slope stabilization - Prevent erosion and soil slippage, strengthening embankments and slopes
- Industrial and commercial construction sites - Prepare subgrades and strengthen soil in preparation for new construction, and stabilize fill materials
Permeation grouting may be paired with complementary methods like slab jacking and underpinning on complex projects to meet both structural and hydraulic performance needs.
Advantages of Permeation Grouting
Permeation grouting is an innovative and versatile ground improvement technique with many benefits:
- Minimal soil disturbance: The process fills existing pore spaces rather than displacing soil, reducing risk to adjacent foundations, utilities, tracks, and tunnel liners.
- Precision control for sensitive sites: Tunable viscosity, gel time, and injection pressure allow fine control near historic structures, hospitals, data centers, and transit infrastructure.
- Durable, long-term soil improvement: Properly selected and placed grout creates a stable, low-permeability matrix that resists washout and supports long-term service loads.
- Effective groundwater management: Build cutoff curtains and contact seals to control inflow, protect excavations, and extend the life of below-grade assets.
- Access-friendly and phasable: Small equipment and flexible drilling allow night, weekend, or phased work with limited headroom - ideal for active facilities and tight spaces.
Engineered outcomes: Performance is verifiable through pre- and post-grout testing (permeability, grout takes, instrumentation), aligning results with design intent.
Our Soil Stabilization & Grouting Process
Every job site in the New York area presents unique geology, groundwater, and operational constraints. PTS delivers an engineering-led approach - from investigation and design to installation and verification - to ensure the grouting solution meets your structural and hydraulic goals.
We collaborate with owners and design teams to define performance requirements and constraints:
- Subsurface characterization: Review geotechnical reports, borings, grain size distributions, Atterberg limits (if fine fraction is present), and groundwater data to determine groutability and target permeability.
- Risk & constructability: Map utilities, evaluate proximity to sensitive structures, and establish acceptable movement criteria.
- Design criteria: Set target permeability reduction, strength gains, treatment geometry, and verification thresholds.
Work planning: Phasing for active facilities, shift work to limit downtime, and protection plans for adjacent assets and occupants.
Material choice is driven by soil gradation, groundwater chemistry, project schedule, and durability requirements. Permeation grouts are divided into two broad categories: chemical grouts and cement-based grouts.
Cementitious grouts work best for granular soils and larger voids. Cement-based grouts are usually more cost-effective for large projects and typically offer greater strength than chemical grouts.
- Cement grout is appropriate for many types of coarse, granular soils
- Microfine cement is suitable for sandy soils, small voids, sealing cracks in rock or concrete, foundation consolidation, and water
- Ultrafine cement is designed for stabilizing silts and very fine sands and sealing tunnel and dam seepage due to micro-fissures
Chemical grouts are typically used for fine, low permeability soils. They offer controllable reaction time and exceptionally low viscosity for improved penetration in certain soil types. Gel time can be adjusted from seconds to minutes for great control of bleed and spread for very selective treatment.
- Sodium silicate grouts have a low viscosity and high penetrability into rock and soil, but they can be sensitive to moisture exposure.
- Polyurethane grouts are versatile and commonly used in below-grade applications to stabilize weak soils thanks to superb water resistance.
- Acrylate grouts offer excellent tensile strength and flexibility. They're often used for soil stabilization and underground water management.
Our engineers specify blends, additives, and catalysts to meet target soil permeability, strength, and durability - balancing performance with environmental and operational considerations.
Injection strategy and pressure control determine the success of permeation grouting. PTS utilizes equipment and procedures designed for predictable, verifiable results. We design an injection pattern that ensures uniform coverage and minimizes shadow zones with careful pressure management and real-time flow and volume tracking.
 PTS implements QA/QC from the first test hole to closeout:
- Trials & test sections: Confirm grout selection, gel times, take rates, and pressure windows before full production.
- Verification testing: Pre/post permeability tests (e.g., falling-head/constant-head), observation wells or piezometers where required, and proof coring in select cases.
- Survey & monitoring: Settlement/tilt points on adjacent structures; slab elevation checks where applicable.
Documentation: Grout logs with depth, pressure, volume, and time; as-built treatment maps; final QA summary.
Why Choose Premium Technical for Permeation Grouting?
Premium Technical Services has specialized in soil modification and remediation, below-grade waterproofing, and foundation restoration since 1972. Our skilled and factory-trained technicians use the latest equipment and techniques to deliver dependable solutions and excellent service to our clients.
NYC-Area Geotechnical Expertise
From urban fill and glacial deposits to tidal influences and complex utility networks, the New York metro presents some of the most challenging subsurface conditions in the country. PTS specializes in engineered solutions for below-grade stabilization and groundwater control in dense, operational environments - tunnels, stations, basements, hospitals, data centers, waterfront facilities, bridges, and industrial plants.
Certified Field Technicians and Engineers
Our teams are trained in specialized grouting methods, materials, and safety protocols. Field crews work hand-in-hand with project engineers to adjust in real time, ensuring the design intent is met when ground conditions vary.
Safety, Efficiency, and Results
We plan around live operations, implement site-specific safety plans, and coordinate with owners, GCs, and facility managers to minimize downtime. Performance is verified through testing and documentation so stakeholders can sign off with confidence.
Integrated Structural & Geotechnical Services
Many projects require a combination of methods. Alongside permeation grouting, PTS provides:
- Slab jacking / concrete leveling for precision floor remediation
- Foundation underpinning for load transfer and excavation support
- Carbon fiber foundation repair to add flexural and shear capacity to existing elements
- Foundation crack repair using epoxy injection or urethane injection for structural restoration and water sealing
This integrated toolbox lets us design engineered solutions that meet both structural and hydraulic objectives while respecting operational constraints.
Permeation Grouting FAQs
Soil grouting is the broad category of techniques that involve injecting grout into the ground to modify its properties. Depending on the method and material, grouting can reduce permeability, increase strength, fill voids, stabilize soil, lift slabs, or transfer load. Permeation grouting is a subset in which a low-viscosity grout permeates existing pore spaces without displacing, compressing, or fracturing the soil, preserving the ground’s structure while enhancing stability and load capacity.
Permeation grouting is a type of pressure grouting in which low-viscosity grout permeates existing spaces in the soil. Grouted soil is stabilized with reduced permeability without increasing volume or significant displacement.
Consolidation or compaction grouting instead uses a low-mobility grout that displaces and compacts surrounding soil to increase density and load capacity.
Chemical grouting employs low-viscosity chemical formulations that permeate tight granular soils and micro-voids that are too small for cement particles. Gel times are adjustable, enabling precise control over spread and set. Chemical grouts are especially useful for groundwater control, sealing cracks and joints, and selective treatment where surgical precision is needed.
Permeation grouting is a minimally invasive technique that stabilizes soil with very little displacement by filling voids in the soil at low pressure. Jet grouting, by comparison, uses high-pressure grouting to erode and consolidate soil into hardened columns or panels of cemented soil (or soilcrete). This process is more invasive and requires larger equipment and headroom.
Request an On-Site Assessment and Permeation Grouting Estimate
Whether you’re planning a deep excavation in a tight Manhattan block, sealing below-grade leakage under an occupied facility, or improving bearing for new equipment, Premium Technical Services can evaluate your site, design a permeation grouting program, and execute with minimal disruption.
Get started today by calling us at 516-409-6000. Request your on-site assessment to discuss project goals, constraints, and schedule. Our team will propose a clear, buildable grouting plan, grounded in New York-area experience and calibrated to deliver safe, verifiable results for your below-grade assets.