
Deck Waterproofing in Monrovia
Long-lasting waterproof coating systems that keep walking decks, roof decks, and balconies protected from water intrusion.
Deck Waterproofing detailsFoothill city below the San Gabriels, split almost evenly between owners and renters.
Takes about 30 seconds. No obligation, no pressure.
The foothills of the San Gabriel Mountains put Monrovia on two kinds of ground at once. There are 15,241 housing units here and occupied housing sits close to an even split between owners and renters, so the work alternates: single family decks up on the slope one week, shared walkway and stair repairs on multi unit buildings further down the next.
Foothill ground gives water speed. On the higher properties a deck has to direct runoff somewhere deliberate, because water simply shed off an edge ends up against a foundation or working into a slope. That drainage decision does more for the life of the repair than the product choice does.
Lower down, the problem inverts. Flatter lots hold water on a deck that has lost its fall, and a coating asked to sit under standing water will fail at its weakest seam every time. Correcting slope comes before anything gets rolled on.
The older stock here has decks and stairs built to a different standard than current work, often with the waterproofing stopping short at the wall rather than turning up behind the finish. That is the detail we look for first, because it explains most of the damage we find behind stucco.
We rebuild what has rotted, fabricate replacement iron and precast stair sections in our own shop, and put the surface back so it drains rather than merely sheds.

Long-lasting waterproof coating systems that keep walking decks, roof decks, and balconies protected from water intrusion.
Deck Waterproofing details
Code-compliant balcony waterproofing that prevents leaks, dry rot, and structural damage before they take hold.
Balcony Waterproofing details
Slip-resistant, weatherproof coatings for exterior stairs and landings built to last for years, plus custom iron based precast staircases we design and fabricate in-house for minimal upkeep.
Stair Waterproofing details
Skilled magnesite repair and replacement that brings worn, cracked, and failing deck substrates back to a solid, stable surface.
Magnesite Decking details
Waterproofing solutions for apartment buildings, HOAs, and commercial properties, designed to pass inspection and hold up over time.
Commercial Waterproofing details
Our team works directly with Building & Safety departments across every city we serve, managing permits and inspections from initial submittal through final sign-off.
Permit Experts detailsThe Monrovia Building Division regulates design, construction, quality of materials, use and occupancy to safeguard life, health, property and public welfare. The city asks that a copy of workers compensation insurance is brought along when a permit is pulled, which we carry as a matter of course, so nothing stalls at the counter.
Balcony Works is built by the same team behind Capital Deck & Stair Waterproofing, decades of hands-on work across thousands of LA and OC properties.
Most projects are backed by an 8-year warranty on workmanship.
Fully licensed (1045438) and insured for residential and commercial work in Monrovia.
A local crew looks at the actual deck, and the quote comes back itemized.
Yes. Monrovia asks for a copy of workers compensation insurance when a permit is pulled. We carry it as standard, so the permit is not held up by documentation that should already be in hand.
Somewhere deliberate. In the foothills water moves fast, and a deck that just sheds off its edge puts it against a foundation or into the hillside. We design the fall and the outlet before choosing a coating.
Both. Occupied housing in Monrovia runs close to an even split between owners and renters, so we do private foothill decks and shared walkway and stair repairs on multi unit buildings in equal measure.
Protect the deck before the next storm. Tell us what you are seeing and we will come look, no obligation.