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Waterproofing.

Not every surface that needs to keep water out is a roof. Foundations, decks, balconies, planters and podium decks all sit under constant moisture load — and unlike a roof, most of them get buried or built over, so the membrane has to be right the first time.

It is the same craft.

Waterproofing a podium deck and waterproofing a flat roof are the same discipline: a continuous membrane, correctly lapped, correctly terminated, with the details at every penetration and upturn resolved properly. Flat roofs are most of what we build, and this is the same work. The difference is that a roof stays accessible and a buried membrane does not.

That is what raises the stakes. When a waterproofing layer fails under a slab, under a planter or beneath a finished deck, getting back to it means taking apart everything that was built on top. So it has to be done right, and it gets protected before anything goes over it.

Above and below grade.

01

Foundations & Below-Grade

Membranes on foundation walls and below-grade structures, where hydrostatic pressure works on the assembly continuously and there is no second chance once the excavation is backfilled.

02

Decks & Balconies

Walkable waterproofing over occupied space. The membrane has to keep water out of the room below while taking foot traffic, furniture and sun — and the perimeter and door sill details are where these usually fail.

03

Planters & Podium Decks

Landscaped areas over structure are the hardest case in waterproofing: permanent moisture, root activity, and a membrane buried under soil and hardscape.

Concrete elevator shaft with black membrane on its lower walls and over its base
The story: Commercial Multi-Unit
Black membrane laid in overlapping sheets across the floor of an excavation

It has to work buried.

STEP 01

Substrate assessment

The membrane can only be as good as what it is bonded to. Substrate condition, moisture content and preparation get sorted out before any material goes down.

STEP 02

Sheet membrane

Factory-consistent thickness, lapped and sealed on site, and chosen for the exposure and what is going on top — not for whichever is quicker to install.

STEP 03

Detailing

Upturns, terminations, drains, penetrations and transitions. Continuous, correctly lapped and properly terminated. This is where waterproofing succeeds or fails; the open field almost never leaks.

Waterproofing questions.

It is the same discipline applied to surfaces that are not roofs. Continuous membrane, correct laps, correct terminations. What changes is that much of it ends up buried or built over, so there is no easy access to fix it afterwards.
Usually. Balcony leaks are most often a failed perimeter, a bad door sill detail or a blocked drain rather than a hole in the middle of the deck. We will find which it is before quoting a repair.
Yes. Those need root-resistant detailing, because the membrane sits under permanent moisture and cannot be inspected once the soil is in.
It depends on the system, the exposure and above all the detailing. A well-detailed membrane lasts far longer than a better membrane detailed badly.

Keep water out of the structure.

Foundations, decks, balconies, planters and podium decks. Tell us what you are protecting and we will tell you what it needs.

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