Deck Waterproofing in Pomona
Durable waterproof coatings that protect walking decks, roof decks, and balconies from water intrusion.
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The biggest city in the San Gabriel Valley, with summers that quietly take decks apart.
Pomona is the most populous city in the San Gabriel Valley, with 43,352 housing units, 97 percent of them occupied, and occupied housing split 53 percent owner to 47 percent renter. Its climate is hot and dry through summer and mild and damp through winter, with a great deal of sunshine year round.
That sunshine is the problem. Constant ultraviolet and daily thermal movement break down a coating from above while working its edges loose from below, and none of it is visible from the ground. The damp winter then arrives at a surface that has spent six months being prepared to fail. Most of the decks we open up here did not fail in a storm, they failed in July and only reported it in January.
Fall adds its own contribution. Seasonal Santa Ana winds out of the northeast strip leaves and grit across every horizontal surface in the city, and most of it ends up in the same places: the scupper, the drain bowl, the low corner of a balcony. The first showers then arrive at outlets that are already half blocked.
A blocked outlet turns a sloped deck into a shallow tank. Water rises above the drain flange, sits over every hairline the summer opened, and pushes in rather than running off. Clearing drains before the rains is the cheapest maintenance there is, and it is the one nobody does.
With nearly half the stock rented, a lot of this is income property: exterior stairs, second floor landings, shared walkways. Those need a traffic rated build and slip resistance, not the same system that goes on a private balcony.
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 →The Pomona Building Safety Division reviews construction plans, issues building permits, provides inspections and enforces building code compliance. We prepare the submittal, pull the permit and carry the job through inspection so the record closes out against the property rather than sitting open.
Decades protecting LA & OC properties.
Guaranteed, long-lasting workmanship.
Licensed #1005325, serving Pomona.
Fast, no-obligation local quotes.
Because that is the sequence. Sun and daily heat movement open the edges, post bases and wall line over months without anything showing. Winter rain does not create those openings, it uses them. Repairing only the crack that leaked misses the rest of the perimeter in the same condition.
Clear every outlet. Santa Ana winds put leaves and grit into scuppers and drain bowls through the fall, and a blocked outlet turns a sloped deck into a shallow pond.
No. A shared stair or walkway takes daily traffic and needs an abrasion resistant, slip resistant build. A private balcony can take a lighter system. Putting a residential coating on a shared walkway is why they wear through in the middle 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.