
Deck Waterproofing in Hidden Hills
Long-lasting waterproof coating systems that keep walking decks, roof decks, and balconies protected from water intrusion.
Deck Waterproofing detailsIn Hidden Hills you need two approvals, not one, and missing the second one is what stalls jobs.
Takes about 30 seconds. No obligation, no pressure.
Most work that needs a city building permit in Hidden Hills also needs Architectural Approval. Starting construction without prior Architectural Committee approval, or building something different from what was approved, will likely result in a Stop Work Notice and a Board hearing. That is where homeowners here get into trouble, so we work the sequence in the right order and a deck rebuild does not get stopped halfway.
The city sits in the southern Simi Hills near the Santa Monica Mountains on the western edge of the San Fernando Valley, close to the Ventura County line. It has 635 housing units, 593 of them occupied, and just over 90 percent of those are owner occupied. Large single family properties, so long spans, elevated terraces, and surfaces that are part of how the house looks.
Hillside lots put the drainage question first. A terrace that sheds over its edge onto the slope below is contributing to a problem rather than solving one. We settle where the water is collected and discharged, then build the waterproofing to serve that plan.
Long spans also move. A terrace of any real length expands and contracts daily, and that movement concentrates at the joint at the house, the railing penetrations and the edge. Detailing those for movement, rather than sealing them and hoping, is the difference between a surface that lasts and one that opens up in its third summer.
Appearance carries weight on these properties. Finish, color, texture and how the edge is trimmed get decided before the first day.

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 detailsHidden Hills contracts its building function out. Transtech, under contract with the city, provides Building and Safety, Planning, City Engineering and Public Works, and Environmental Services, so plan check and inspection run through Transtech on the city's behalf. The Architectural Committee approval sits alongside it, and we assemble both packages rather than pulling the permit and finding the committee has not signed off.
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 Hidden Hills.
A local crew looks at the actual deck, and the quote comes back itemized.
Almost always. Most work that needs a City Building Permit also needs Architectural Approval, and starting without it, or building something different from the approved plans, will likely draw a Stop Work Notice and a Board hearing.
Transtech, under contract with the city, provides Building and Safety, Planning, City Engineering and Public Works, and Environmental Services for Hidden Hills. Plan check and inspection run through them on the city's behalf.
The city is hillside ground in the southern Simi Hills. Water shed off a terrace edge soaks into the slope below. We decide where it collects and discharges first, then waterproof to serve that.
Protect the deck before the next storm. Tell us what you are seeing and we will come look, no obligation.