Deck Waterproofing
Durable waterproof coatings that protect walking decks, roof decks, and balconies from water intrusion.
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Protect your property from costly water damage with Southern California’s trusted waterproofing contractor. Most jobs are backed by an industry-leading 8-year warranty.
From decks and balconies to stairs, concrete, and commercial properties, Capital Deck & Stair delivers reliable waterproofing that stops leaks, prevents dry rot, and protects your investment for years to come.
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 →Talk to a local waterproofing expert today and protect your property before the next storm.
Decades of hands-on waterproofing expertise across thousands of LA and OC properties.
Industry-leading coverage on workmanship, so your protection is guaranteed to last.
Fully licensed (#1005325) and insured for residential and commercial work.
Free on-site estimates and responsive crews based right here in Southern California.
From the San Fernando Valley to the South Bay and into North Orange County, Capital Deck & Stair protects homes and businesses in every community below.
“Had a huge issue in the new year with my balcony leaking. Thankfully, even during holidays they came by quickly to quote and had availability pretty quick. There were heavy rains for a while here, so I’m glad we got it situated and under control. Definitely would recommend. Thanks again and happy new year”
“Quick response. Needed complete balcony decking, waterproofing and floor finishing. Very good presentation on the work process. I reached out to several companies, none were as professional as Capital. Reasonable price fantastic work, good communication. Robb showed a sample of the layers, measured and took the photos of the project and came up with an estimate quickly.”
“I had the pleasure to work with Alexander and Abraham during the project. He was super attentive, professional, on time and gave me all the information I needed. Grateful I found a company around the holidays that was still able to make it out and repair my condo’s stairs. They re-sealed and waterproofed it all. Thanks again and Happy Holidays!!”
Expert advice on deck, balcony, and stair waterproofing from the Capital Deck & Stair team.
Tell us about your deck, balcony, or stairs and we’ll schedule a free on-site evaluation. Most quotes returned same day.