Deck Waterproofing in Claremont
Durable waterproof coatings that protect walking decks, roof decks, and balconies from water intrusion.
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Foothill property below the San Gabriels, where a deck has to move water somewhere on purpose.
Foothill ground gives water momentum, and Claremont has it. The city occupies the San Gabriel Valley at the foothills of the San Gabriel Mountains, with nearly 64 percent of its occupied homes owner occupied. A deck that only sheds water sends it straight to the base of a wall or into a slope, and the damage turns up somewhere other than the deck, which is why the diagnosis often takes longer than the repair.
We look at where the water is going before deciding what goes on top of the deck. Slope, drains, and the detail where the surface meets a wall or a post do more work than the coating brand ever will.
Diagnosis on a foothill property usually starts at the low corner. We check whether the deck still has fall, whether the drain sits at the low point or an inch above it, whether the edge metal has a drip on it or is dumping straight down the stucco, and whether the discharge lands on grade that carries it away or against the foundation.
The other 36 percent of occupied units are rented, and that side of the work looks different: an exterior stair serving two or three doors, a second floor landing, a walkway where the surface has been ground down at the traffic line. Those get staged so nobody loses their route while the work runs.
Once we open a deck, the story is written in the plywood. Dark staining that runs from the wall out means the ledger detail failed. Staining that starts at a post and spreads means the penetration did. Delamination across whole sheets means it has been wet a long time. We show you what is there before deciding what goes back.
Durable waterproof coatings that protect walking decks, roof decks, and balconies from water intrusion.
Learn more →Code-compliant balcony systems that stop leaks, dry rot, and structural damage before they start.
Learn more →Slip-resistant, weatherproof coatings for exterior stairs and landings that last for years. We also design and fabricate custom iron based precast staircases for minimal maintenance.
Learn more →Expert magnesite repair and replacement to restore worn, cracked, and failing deck substrates.
Learn more →Waterproofing for apartments, HOAs, and commercial properties, built to pass inspection and last.
Learn more →We work with Building & Safety departments in every city we serve, handling permits and inspections from submittal to final sign-off.
Learn more →Claremont takes any project with plan sets electronically by email, submitted with the permit worksheet and the supporting documents, while permits that need no plans are still processed over the counter. We prepare the submittal in the form the city wants and carry the job through inspection.
Decades protecting LA & OC properties.
Guaranteed, long-lasting workmanship.
Licensed #1005325, serving Claremont.
Fast, no-obligation local quotes.
Anything with plan sets goes in electronically by email along with the permit worksheet and supporting documents. Work that needs no plans is still handled over the counter.
Water follows framing, not logic. It gets in at a high detail, runs the slope of the joists, and exits wherever the assembly lets it. On foothill lots the fall of the structure itself moves the exit point. We find the entry, not the exit.
Often yes. Re-establishing fall across the surface, relocating or lowering a drain and putting proper metal at the edge fixes most of it. That work only holds if the substrate underneath is dry and sound, which is what we check first.
A professionally installed waterproofing system typically lasts many years. Capital Deck & Stair backs most projects with an 8-year warranty on workmanship, and proper maintenance can extend the life well beyond that.
Cost depends on the surface size, condition, and the coating system required. We provide a clear, itemized quote after a free on-site inspection, with no obligation and no pressure.
Most residential decks, balconies, and stairs take about a week from start to finish, depending on prep, repairs, and weather. We give you a firm timeline before work begins.
Yes. We handle residential, HOA, and commercial waterproofing across Los Angeles and Orange County, and we are licensed (#1005325) and insured for projects of every size.
Protect your property before the next storm, talk to a local expert today.