Commercial Below-Grade Waterproofing Services
Protect Your Foundation from the Ground Up
Water intrusion at or below ground level can compromise the integrity of your entire commercial building. WC Decking & Waterproofing provides expert below-grade waterproofing solutions for basements, foundations, retaining walls, parking garages, and elevator pits across Southern California.
Below-Grade Waterproofing That's Built to Last
We use advanced waterproofing systems—such as sheet membranes, liquid-applied coatings, and cementitious systems—engineered to resist hydrostatic pressure and long-term exposure to moisture.
Our process includes:
Site evaluation and substrate inspection
Surface preparation (including shot blasting or cleaning)
Crack and joint sealing
Application of below-grade waterproof membrane system
Drainage mat installation and backfill protection
Compliance with commercial building codes and specifications
We tailor every solution to meet the soil conditions, structural load, and moisture levels of your specific property.
Benefits of Below-Grade Waterproofing for Commercial Properties
Prevents Water Infiltration at the Foundation Level
Stops leaks in basements, parking garages, and retaining walls caused by groundwater or poor drainage.
Protects Structural Integrity and Reinforcement
Prevents corrosion of steel reinforcements and damage to concrete over time.
Reduces Risk of Mold and Indoor Moisture Issues
Keeps interior environments dry, safe, and compliant with health standards.
Avoids Costly Repairs and Structural Failure
Proactive waterproofing reduces the chance of foundation settling, cracks, or major renovations.
Meets Commercial Construction and Safety Codes
Our work is approved for commercial-grade applications and moisture control regulations.
Our Commercial Planter Waterproofing Process
We use high-performance materials and techniques to fully encapsulate and isolate moisture zones.
Office Buildings
Multi-Unit Residential Complexes
Underground Parking Garages
Elevator Shafts
Commercial Basements
Retaining Walls and Foundations
Protect Your Commercial Property
Contact us for a comprehensive evaluation and custom waterproofing solution
Why Choose WC Decking & Waterproofing
Commercial Expertise
Specialized experience in large-scale commercial waterproofing projects
Code Compliance
All work meets or exceeds commercial building codes and specifications
Reliable Partnership
Trusted by property managers and contractors across Southern California
Serving Commercial Properties Throughout Southern California
Professional planter waterproofing for HOAs, apartments, and commercial buildings
Orange County
Newport Beach, Irvine, Anaheim & More
Los Angeles County
Santa Monica, Beverly Hills, Pasadena & More
Riverside County
Corona, Riverside, Murrieta & More
Ventura County
Thousand Oaks, Ventura, Oxnard & More