Below-Grade Waterproofing Services in Los Angeles
Serving Los Angeles Pacific Palisades And Malibu
As a licensed and bonded below-grade waterproofing contractor with 25+ years of experience, Surfacing And Waterproofing provides below-grade waterproofing solutions for basements, foundations, retaining walls, and underground parking structures throughout Los Angeles, Bel Air, Beverly Hills, Malibu, and Pacific Palisades. Our waterproofing systems combine high-performance waterproofing membranes, drainage boards, and perimeter French drain systems to help protect structures from hydrostatic pressure, groundwater intrusion, and moisture damage.
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Protecting Your Foundation with Below-Grade Waterproofing
Moisture infiltration can lead to structural damage, foundation weakening, and mold growth — especially in below-grade structures like basements, retaining walls, and underground parking garages. At Surfacing And Waterproofing, we specialize in high-performance below-grade waterproofing solutions designed to prevent water penetration and ensure long-term durability for both residential and commercial properties. Whether you’re dealing with basement waterproofing in a hillside home in Bel Air, foundation waterproofing for a commercial building in Beverly Hills, or retaining wall waterproofing for an oceanfront property in Malibu, our team delivers customized, system-based solutions that address the root cause of water intrusion.
See our Pacific Palisades basement waterproofing case study.
How Below-Grade Waterproofing Works
Below-grade waterproofing involves a combination of drainage solutions, waterproofing membranes, and sealants to create a watertight barrier that protects structures from hydrostatic pressure and moisture intrusion. Our approach ensures that water is redirected away from the foundation while maintaining the structure’s integrity.
Every below-grade waterproofing project presents different site conditions and waterproofing requirements. Depending on the project, we install liquid-applied and sheet-applied waterproofing membranes, drainage boards, perimeter French drain systems, and waterproofing accessories designed to help manage groundwater and hydrostatic pressure. We install a variety of proven below-grade waterproofing systems, including EPRO PreTak and other industry-leading waterproofing products, depending on the project’s specific requirements.
Key Components of Our Below-Grade Waterproofing System:
- Waterproofing Membranes – We use liquid-applied and sheet-applied membranes to seal below-grade surfaces against moisture infiltration.
- Drainage Boards – Installed along foundation walls, these boards channel water away while providing additional protection.
- Perimeter Drainage Systems – French drains, gravel layers, and sump pump installations help manage groundwater and prevent buildup.
- Sealants & Vapor Barriers – We apply industrial-grade sealants and vapor barriers to protect against moisture seepage and condensation.
Our Below-Grade Waterproofing Process
- Site Assessment – Our experts evaluate groundwater levels, soil conditions, and foundation vulnerabilities before selecting the best waterproofing approach.
- Surface Preparation – Cleaning and prepping foundation walls to ensure optimal adhesion of waterproofing materials.
- Application of Waterproofing Membranes – Liquid or sheet-applied membranes are installed to seal foundation walls and underground structures.
- Drainage System Installation – Drainage boards, French drains, and sump pumps are integrated to direct water away from the foundation.
- Final Inspection & Backfill – We conduct a thorough quality check before carefully backfilling to protect the waterproofing system.
Benefits of Professional Below-Grade Waterproofing
✔ Prevents Structural Deterioration – Stops water from weakening concrete and causing cracks.
✔ Reduces Hydrostatic Pressure – Proper drainage and waterproofing prevent excess water buildup around your foundation.
✔ Minimizes Risk of Mold & Mildew – Keeps below-grade spaces dry and prevents health hazards.
✔ Enhances Property Value – A well-protected foundation increases the lifespan and integrity of your building.
Serving Los Angeles, Pacific Palisades & Malibu
We provide below-grade waterproofing and foundation waterproofing services for residential, commercial, and hillside properties throughout Los Angeles, Bel Air, Beverly Hills, Malibu, and Pacific Palisades. Whether you’re constructing a new building or waterproofing an existing foundation or retaining wall, we recommend the most appropriate waterproofing system based on your project’s site conditions.
Request a Free Consultation
Protect your foundation and below-grade structures with professional waterproofing services from Surfacing And Waterproofing. We provide free, no-obligation estimates for basement waterproofing, foundation waterproofing, retaining wall waterproofing, and below-grade waterproofing projects throughout Los Angeles. Call (323) 508-4033 or email your project plans to [email protected].
What is below-grade waterproofing and why is it important?
Below-grade waterproofing protects structures below ground level, including basements, foundations, retaining walls, and underground parking structures, from groundwater intrusion, hydrostatic pressure, and moisture damage. A properly designed waterproofing system helps prevent leaks and protects the long-term performance of the structure.
What waterproofing systems do you use for below-grade structures?
Depending on the project requirements, we install liquid-applied and sheet-applied waterproofing membranes, drainage boards, perimeter French drain systems, vapor barriers, and EPRO PreTak waterproofing systems to provide long-term below-grade waterproofing protection.
How long does below-grade waterproofing last?
When properly installed using quality waterproofing materials, below-grade waterproofing systems are designed for long-term performance. The lifespan depends on the waterproofing system selected, site conditions, and proper installation.
Do you handle hillside and coastal properties?
Yes. We provide below-grade waterproofing for hillside and coastal properties throughout Bel Air, Beverly Hills, Malibu, Pacific Palisades, and Los Angeles. These projects often require carefully designed waterproofing membranes, drainage boards, perimeter French drain systems, and corrosion-resistant stainless steel components to help manage groundwater intrusion and withstand harsh coastal environments.
Can you waterproof an existing basement or foundation?
Absolutely. While below-grade waterproofing is most effective during new construction, we also provide below-grade waterproofing solutions for existing basements, foundations, and retaining walls. Our team will assess your property’s current condition, identify potential water intrusion points, and recommend the most appropriate waterproofing system based on your project’s site conditions and waterproofing requirements.
Protect Your Foundation with Professional Below-Grade Waterproofing
Request a free, no-obligation estimate for your below-grade waterproofing project. Call (323) 508-4033 or email your project plans to [email protected]. We'll review your project and recommend the most appropriate below-grade waterproofing solution
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