Waterproofing & Leak Sealing
Creates watertight barriers for subsurface structures
solutionsbelow grade waterproofing
Below-Grade Waterproofing
What is Below-Grade Waterproofing?
Below-grade waterproofing protects basements, tunnels, vaults, and underground facilities from groundwater infiltration. Using trenchless polymer injection, voids, cracks, and joints are sealed to create watertight barriers that preserve structural integrity and prevent costly damage.
Problems Solved
- Groundwater infiltration through cracks, joints, and penetrations
- Moisture intrusion leading to mold, odor, and material damage
- Soil erosion around underground structures from leaks
- Structural weakening caused by hydrostatic pressure
- Disruptive excavation and downtime from traditional waterproofing methods
Types of Polymers Used
High-Density Polyurethane Foams
- Expands to densify and stabilize loose backfill soils
- Provides lightweight reinforcement without added soil pressure
- Cures rapidly to minimize operational disruption
Structural Polyurethane Resins
- Creates rigid reinforcement zones behind walls and utilities
- Transfers structural loads to stable ground layers
- Extends service life of supported structures
Hydro-Insensitive Polymers
- Expands and cures in wet or groundwater conditions
- Seals voids and prevents erosion in saturated soils
- Provides long-term durability in challenging sites
Benefits of Below-Grade Waterproofing
Below-grade waterproofing with polymer injection provides long-term sealing and soil stabilization without excavation. These solutions protect underground spaces from infiltration, preserve structural integrity, and reduce maintenance costs.
Watertight Protection for Subsurface Structures
- Stops leaks and groundwater infiltration
- Creates durable, long-term watertight seals
- Requires no excavation or structural replacement
- Protects underground assets and facilities from damage
Key Applications
Basements & Foundations
Seals leaks and prevents infiltration in below-grade walls
Utility Vaults
Restores watertight conditions around critical utilities
Transit Tunnels
Seals joints, cracks, and penetrations in underground transit systems
Parking Garages
Protects underground garages from hydrostatic water pressure
Stormwater & Sewer Structures
Blocks infiltration in underground drainage facilities
Industrial Subgrade Facilities
Provides watertight reinforcement for below-grade plants and utilities
Services
Below-grade waterproofing is supported by these services:
Crack Repair
Crack Repair
Seals foundation, wall, and tunnel cracks
Void Filling
Void Filling
Eliminates cavities allowing infiltration around assets
Soil Stabilization
Soil Stabilization
Reinforces soils around below-grade structures
Structural Reinforcement
Structural Reinforcement
Strengthens compromised underground facilities
Curtain Grouting
Curtain Grouting
Reinforces watertight protection around underground structures
How the Process Works
1
Investigation
Structures inspected for cracks, voids, or water infiltration
2
Planning
Injection design tailored to underground and hydrostatic conditions
3
Access
Small-diameter injection ports installed with minimal disruption
4
Injection
Expanding polymers seal leaks and reinforce surrounding soils
5
Monitoring
Placement tracked in real time to ensure watertight performance
6
Validation
Final inspection confirms restored waterproofing and stability
Get Started with Expert Support
Phone
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