Water always finds the cheapest repair someone did last time.

Balconies, walkways and decks over living space are walking surfaces and roofs at the same time. That's a harder job than either one alone, and it's why they leak. Proper systems, proper flashing details, proper slope to drain.

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Tell us what you're looking for and we'll come look at the floor. Free, and no pressure.

Is this the right choice?

We'd rather tell you now than after.

Every finish is wrong for something. Here's where waterproofing is the right call and where we'd point you somewhere else.

A good fit when…

A balcony or deck sits over living space, a garage or an entry
You're seeing staining, bubbling paint or damp on the ceiling below
The existing coating is cracked, blistered or worn through
An inspection or HOA report flagged the walking surface
California SB326 or SB721 balcony inspection turned something up

We'd suggest something else if…

There's already dry rot or structural damage in the framing — repair first
The deck has no slope to drain and can't be re-sloped — that's a bigger fix
You want a coating applied over a surface that's actively wet

How we do it

The parts that decide whether it lasts.

The details leak, not the field

Nobody's balcony fails in the middle. It fails at the wall transition, the door threshold, the drain, the railing post penetrations and the edge metal. Those details are the job. The flat part is the easy part.

Slope to drain, or it doesn't matter

Standing water finds every weakness eventually. If the deck doesn't drain we address the slope before we coat, because a perfect membrane under a permanent puddle is a countdown, not a repair.

It has to be walked on too

A waterproofing system on a deck is also a wearing surface — it needs texture for grip when wet and enough build to survive furniture, foot traffic and UV. Roofing products alone don't survive being walked on.

SB326 and SB721 documentation

If your building is under California's balcony inspection requirements, the repair needs to be documented properly for the record. We'll give you what you need for the file and coordinate with your inspector.

Our work

Waterproofing, on real jobs.

Waterproofing underlayment — metal lath system

Straight answers

What people ask us about waterproofing.

How do I know if my balcony is leaking?

The ceiling below tells you first — staining, bubbling paint, a soft spot, or a musty smell. By the time it's visible below, water has been in the assembly a while. That's the point to call rather than the point to wait.

Is this the same as SB326 or SB721 work?

Those laws require inspection of exterior elevated elements on multifamily buildings. We don't perform the inspection, we do the repair the inspection calls for — and we document it so it satisfies the record.

Can you just coat over what's there?

Sometimes, if the existing system is sound and compatible. Often not. A new membrane over a failing one fails with it, and then you've paid twice. We test adhesion and check the details before we recommend either way.

How long does the deck have to stay off-limits?

Prep, membrane and wear coat each need their own cure window, and weather affects all of them. Most residential balconies are a matter of days. We'll give you the actual sequence and dates up front.