Waterproofing
Waterproofing is sealing the parts of a building that are not the roof but still have to keep water out: the balconies and decks people walk on, the exterior walls that take wind-driven rain, and the structure below grade that sits against wet soil. Water always finds the low point. We waterproof everything beneath the roofline for properties across Los Angeles and Ventura counties, walls and foundations included, so one contractor is accountable for every way water enters your building.
Where We Stop Water
Balcony & Deck
Walkable waterproof coating systems for decks, balconies, and stairs.
The membrane is carried up every wall, threshold, and post penetration and tied into the flashing there, because a walking surface fails at its interruptions long before it fails in the field.
Below-Grade
Foundation walls, planters, and subterranean spaces that stay dry.
Sealed before the dirt goes back. Water arrives against a below-grade wall under pressure, and once it is backfilled there is no easy second chance at the membrane.
Exterior Walls
Sealing the envelope where wind-driven rain gets in.
A leak that shows up only in wind-driven rain, near a wall or a window, is usually the wall and not the roof, which is why the wall is tested on its own terms before anyone opens the roof.
Sump Pumps & Drainage
French drains and pumps — water managed, not fought.
Every system we install is tied into the building's drainage, so water leaves the property by design instead of finding its own way out through something you own.
Pools & Planters
Containment waterproofing that protects the structure around it.
Containment is the inverse problem: the structure holds water and soil on purpose, so the membrane's job is protecting everything around it rather than keeping water out of it.
Roof Tie-Ins
Where waterproofing meets roofing, one contractor owns the seam.
The seam where a roof system meets a deck or a wall system belongs to both trades and usually to neither. We scope both sides in one document, so there is no other contractor to point at.
One of these systems, seen from the customer's end of it — their words, recovered from our previous website.
Pool-area waterproofing
I recently had Silver Leaf Construction waterproof my pool area and couldn't be happier. From the initial consultation to the final check, their team was professional, knowledgeable, and exceptionally tidy. They explained the best waterproofing options, tailored to our pool's unique structure, and executed the job flawlessly. The work looks superb, no cracks, no leaks, just peace of mind. Highly recommend their expertise and attention to detail!
Balcony Inspection Flagged Something?
California has two balcony inspection laws: SB326 for condominiums and HOAs, SB721 for apartment buildings. Both now require repairs of flagged elevated elements within set windows. We repair what the report flagged: waterproofing, flashing, and coating systems on decks, balconies, and walkways. The balcony repair page walks through which law covers your building, what happens after a flagged report, and how the repairs get done.
Waterproofing Questions
Deck coating protects surfaces you walk on above living space — decks, balconies, stairs — with a flexible, walkable membrane. Below-grade waterproofing seals structure that sits against soil: foundation walls, planters, subterranean rooms. Water arrives there under pressure, and once the dirt goes back there is no easy second chance. They are different systems solving different problems. We install both, which is why one contractor can own every way water enters your building.
Because the part keeping water out is not the part you can see. A walking deck is a flat roof you furnish: the coating underfoot is the membrane, and it wears fastest exactly where feet land, at posts and corners, and at the door threshold. It fails quietly and from the top down while the surface still looks like a deck. With rooms underneath, the first thing anyone notices is usually a stain on a ceiling rather than a drip. A coating renewed on a schedule is ordinary maintenance. The same deck after water has reached the framing is a different job, because the structural members have to be made sound before any waterproofing goes back on.
We trace the water back from where it shows to where it enters — and those are rarely the same place. Water travels along framing, laps, and fasteners before it appears on a ceiling, so we test the suspect area section by section and confirm the entry point before recommending anything. It is slower than guessing. It is also why the repair holds.
Yes. Planters and pools are containment waterproofing. The structure holds water and soil on purpose, so the membrane's job is to protect everything around it. We waterproof planters, pools, and fountains, and we tie those systems into the building's drainage so water leaves by design.
Yes. Coverage is confirmed in writing for each job before work begins. System coverage depends on the membrane or coating being installed, and our workmanship coverage is stated alongside it in your scope, so you know exactly what is covered and for how long before you sign anything.
Where We Do This Work
Balconies, decks, walls, and below-grade space across Los Angeles and Ventura counties. Tap a city to read what its terrain does with water.
Also From Silver Leaf
- Roof Replacement & RepairShingle, tile, flat, and low-slope for homes
- Commercial & Flat RoofingTPO, torch down, coatings, maintenance
- Balcony RepairSB326 & SB721 repairs, scoped in writing
- Emergency Roof Leak RepairLeak response 7 days a week — same-day during rain
Eleven jobs filmed on our own sites in Our Work, and more about how we work and who you will be talking to.
One referral we make in the other direction: when the project reaches past the building into the grounds themselves — grading, planting, irrigation, drainage as part of a designed yard — that is our sister company, Silver Leaf Landscape. Same family, separate business, its own license and crews.
Stop Chasing the Stain.
We trace the leak to where it actually enters, then put the repair in writing. Inspections are free.
7500 Valjean Ave, Van Nuys, CA 91406 · (818) 747-1131 · Free estimates.Every day 6:00 AM – 9:00 PM