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Balcony & Deck Waterproofing
Complete waterproofing and repair for plywood and concrete walking decks, with careful attention to slope, drains, flashing and transitions.
- Balconies & walking decks
- Leak and dry-rot repairs
- New systems & resurfacing
Los Angeles & Orange County · Since 1985
Complete residential & commercial waterproofing
Protecting Southern California homes, HOAs, apartment communities and commercial properties—from rooftop decks and balconies to under-tile and below-grade systems.
40+ years of experience Family-owned Residential & commercial
1985Established in Southern California
40+Years of waterproofing experience
2Counties served: Los Angeles & Orange
#993188California contractor license
Waterproofing services
Focused expertise for every exposed surface
Find waterproofing and repair options for balconies, decks, walkways, stairs and concealed surfaces. Explore the service that matches your property to learn about the work, suitable systems and next steps.
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Walkway & Stair Waterproofing
Durable, slip-resistant systems for exterior walkways, stairs and landings at homes, apartments and HOA communities.
- Exterior walkways
- Stairs & landings
- Magnesite repair
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Rooftop Deck Waterproofing
Pedestrian roof-deck protection coordinated with walls, doors, scuppers and drainage so vulnerable edges are handled correctly.
- Occupied roof decks
- Slope & drainage correction
- Door and wall transitions
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Commercial, HOA & Multifamily Waterproofing
Organized waterproofing and repair programs for occupied properties, from one failed balcony to phased community-wide work.
- HOAs & condominiums
- Apartment buildings
- Commercial properties
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Concrete & Pool Deck Waterproofing
Protective coating and resurfacing solutions for concrete decks, pool surrounds, courtyards and high-traffic exterior surfaces.
- Concrete deck systems
- Pool decks & courtyards
- Crack treatment & resurfacing
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Under-Tile & Below-Grade Waterproofing
Specialized membrane systems beneath tile and at below-grade structures where water management must be resolved before finishes are installed.
- Waterproofing beneath tile
- Foundations & retaining walls
- Planters & buried surfaces
Have an SB 326 or SB 721 report?Corrective repairs have a dedicated pathway so your report can be reviewed balcony by balcony.See SB repair services
Already have an inspection report?
Turn SB 326 or SB 721 findings into a repair plan
Property managers and HOA boards can send us the report they already have. We review the listed failures, organize the repair areas and prepare a practical proposal for corrective waterproofing and related repairs.
- Report-based scope review
- Balcony-by-balcony repair breakdown
- Coordination for occupied properties
Repair pathway
- 1Send the reportInclude photos, plans and the property address when available.
- 2Site verificationWe confirm access, conditions and repair quantities.
- 3Receive a clear proposalScope, exclusions and pricing organized for decision-makers.
Real work, clearly explained
Waterproofing projects across Greater Los Angeles
Walkway & staircase · CIM 1000
New plywood substrate protected with a continuous CIM 1000 waterproofing surface
Swipe before & after
Customer reviews
What our customers say
Selected five-star review excerpts from Google and Yelp.
Rooftop deck resurfacing
“California Decking and Waterproofing just resurfaced two roof decks at my 4-unit, townhouse building, … Diego and Nathaniel did a beautiful job.”
HOA balcony waterproofing
“The quality of the waterproofing and finish exceeded our expectations”
Condo association · SB 326 repairs
“…the owner was very responsive with questions throughout the process.”
Waterproofing blog & resource center
Helpful answers for property owners, HOAs and property managers
Read practical articles about balcony repairs, deck maintenance, SB 326 and SB 721 requirements, waterproofing systems and common leak problems.
View all articles
Flashing, door thresholds & repair planning
Replacing a balcony sliding door? Plan the waterproofing first
UpdatedA new sliding door meets an existing waterproof deck at a critical connection. Plan the flashing, finished height and trade responsibilities before either crew closes up the work.
Read articleWalkway repairs & occupied-property planning
Can residents still get home during walkway waterproofing?
UpdatedA shared walkway is also someone’s route home. Plan resident access, temporary closures, curing time and reopening before waterproofing begins.
Read article
SB 326 & SB 721 repairs
What happens after a balcony fails an inspection?
A step-by-step look at report review, field verification, repair pricing, concealed conditions and planning corrective work.
Read articleA better waterproofing conversation starts here