Moisture protection for walls in contact with soil
Retaining Wall & Below-Grade Waterproofing in Los Angeles
Retaining walls, foundations, basements, planters, and subterranean structures face moisture from surrounding soil and irrigation. All Weather Waterproofing & Coating installs and repairs protective systems designed to reduce seepage, limit deterioration, and help keep interior and structural areas dry.
- 25+ years of waterproofing experience
- 110+ five-star Yelp reviews
- Many positive Google reviews
Control water before it enters the wall
Why Below-Grade Walls Require Specialized Waterproofing
Walls below or against grade can remain in contact with damp soil for long periods. Irrigation, seasonal rain, poor drainage, cracks, and changes in grade can increase moisture exposure and pressure against the wall.
Water may enter through porous concrete or masonry, construction joints, penetrations, wall-to-footing transitions, cracks, or the top and sides of an incomplete system. Interior staining can appear far from the original entry point because moisture follows joints and material changes.
An effective approach begins with understanding the direction of water exposure and the accessible side of the wall. Surface preparation, crack and joint treatment, membrane continuity, termination details, protection layers, and drainage must be considered together.
Know the warning signs
Signs of Retaining Wall or Below-Grade Moisture Problems
Early investigation helps distinguish a surface symptom from a larger moisture path.
- Damp spots, water stains, or active seepage on interior walls
- Efflorescence or white mineral deposits on concrete or masonry
- Peeling paint, damaged finishes, or musty odors near the wall
- Cracks, open joints, or leakage around wall penetrations
- Moisture after irrigation or seasonal rainfall
- Deteriorating concrete, mortar, coating, or previous patching
- Water collecting near the top or base of a retaining wall
- Repeated interior sealing that has not resolved the source
Professional waterproofing solutions
Below-Grade Waterproofing Applications
The recommended system depends on access, wall material, soil exposure, drainage, and the location of moisture entry.
Retaining Walls
Waterproofing helps protect concrete and masonry walls that hold soil along yards, slopes, driveways, and property edges.
Foundation Walls
Protective systems address vulnerable wall surfaces, joints, penetrations, and wall-to-footing transitions.
Basements and Subterranean Rooms
Moisture paths are evaluated around walls, floors, joints, and penetrations affecting below-grade occupied space.
Planters and Raised Beds
Waterproofing helps isolate wet soil and irrigation from adjacent walls, decks, and occupied building areas.
Crack and Joint Repair
Cracks, construction joints, transitions, and penetrations receive compatible preparation and reinforcing details.
Drainage Coordination
Waterproofing, protection layers, outlets, and drainage conditions are considered as parts of the same moisture-control strategy.
A complete, condition-based approach
Our Below-Grade Waterproofing Process
A complete evaluation is necessary before selecting a surface treatment or membrane.
- AssessWe review moisture patterns, wall materials, cracks, joints, penetrations, grade, irrigation, and accessible surfaces.
- PrepareLoose coatings, contamination, and deteriorated materials are removed so the wall can receive compatible repairs.
- DetailCracks, joints, corners, penetrations, terminations, and wall-to-footing transitions are addressed.
- WaterproofThe selected coating or membrane is installed continuously across the prepared wall surface.
- ProtectProtection and drainage requirements are coordinated before soil, finishes, or adjacent assemblies conceal the work.
Residential and commercial experience
Waterproofing for Hillside Homes, Apartments and Commercial Properties
Los Angeles properties often include retaining walls, sloped sites, below-grade garages, basements, planters, and subterranean building areas. We work with homeowners, property managers, HOAs, contractors, apartment communities, and commercial property owners to address these moisture-prone conditions.
Where the soil-facing side is accessible, exterior-side waterproofing can address water before it passes through the wall. When access is limited, the existing condition must be evaluated carefully to determine practical repair and moisture-control options.
Local waterproofing service
Retaining Wall Waterproofing Throughout Los Angeles
We serve hillside, coastal, and inland communities where irrigation, landscaped slopes, seasonal rain, and below-grade construction can create persistent wall moisture exposure.
- Santa Monica
- Beverly Hills
- Malibu
- West Hollywood
- Marina del Rey
- Manhattan Beach
- Van Nuys
- Woodland Hills
- Calabasas
- Greater Los Angeles
Explore related solutions
Related Waterproofing Services
Explore the service most closely matched to your property, surface, or moisture concern.
Common questions
Retaining Wall & Below-Grade Waterproofing FAQs
Why does water come through a retaining wall?
Water can enter through porous concrete or masonry, cracks, joints, penetrations, failed coatings, incomplete terminations, or areas where drainage allows moisture to remain against the wall.
Is it better to waterproof the soil side of the wall?
When practical, addressing moisture on the side where it originates can help stop water before it passes through the wall. Access, excavation, wall condition, drainage, and adjacent improvements all affect the recommended approach.
Can you repair cracks in a below-grade wall?
Cracks can be prepared and treated as part of a waterproofing repair, but the repair method depends on the crack, wall material, movement, moisture exposure, and accessibility.
Do planters need waterproofing?
Planters and raised beds can expose adjacent walls and decks to continuous wet soil and irrigation. A compatible waterproofing and drainage assembly helps separate that moisture from the building.
Will interior paint stop below-grade water?
Paint may conceal staining temporarily but usually does not address the original moisture path. The wall, cracks, joints, exterior exposure, penetrations, and drainage conditions should be evaluated.
Which areas do you serve?
Our service area includes Santa Monica, Beverly Hills, Malibu, West Hollywood, Marina del Rey, Manhattan Beach, Van Nuys, Woodland Hills, Calabasas, and surrounding Los Angeles communities.
Protect Retaining and Below-Grade Walls From Moisture
Tell us where you see seepage, staining, efflorescence, cracking, or dampness and whether the wall is accessible from the soil side. We can help determine the next step for inspection, repair, or a new waterproofing system.
Serving Los Angeles and nearby communities with more than 25 years of waterproofing experience.