Deck Waterproofing
Durable waterproof coatings that protect walking decks, roof decks, and balconies from water intrusion.
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Expert magnesite repair and replacement to restore worn, cracked, and failing deck substrates, then waterproof them to last.
Magnesite was used on many Southern California decks and stairs, and over the decades it cracks, delaminates, and lets water reach the structure. Patching over failing magnesite rarely lasts, the underlying problem keeps spreading.
Capital Deck & Stair removes and repairs failing magnesite, rebuilds a sound substrate, and applies a modern waterproofing system on top, giving you a durable surface backed by our 8-year warranty.
Notice any of these? Call 818-697-6334 for a free on-site evaluation.
We assess the substrate, drainage, and existing coating to pinpoint the real source of water intrusion, not just the symptom.
We remove failed coatings, repair cracks and dry rot, and rebuild a sound, stable substrate before anything else.
We install the right coating system for your surface, traffic, and exposure, applied to code by experienced crews.
We review the finished work with you and back most projects with our industry-leading 8-year warranty.
Decades of waterproofing across LA & OC.
Guaranteed workmanship that lasts.
Fully licensed & insured.
Fast, local, no-obligation quotes.
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 →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 →It depends how far the deterioration has spread. We assess the substrate during a free inspection and recommend targeted repair or full replacement, whichever protects your property best.
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 today, talk to a local waterproofing expert.