Waterproofing Auckland
Certified wet-area and under-tile waterproofing across Auckland. Showers, bathrooms, laundries and tiled decks, sealed to code so the water stays where it belongs.
Auckland waterproofing
When you need waterproofing
Here’s the uncomfortable truth about tiles: they don’t keep water out, and neither does the grout between them. Both are porous, so given half a chance water wicks straight through the joints and into whatever sits underneath. That’s why every tiled wet area needs a waterproof membrane below the tile, not just tidy grout on top.
Most people think about it when a bathroom or ensuite is being renovated, when a new build reaches lining stage, or when a shower has been leaking quietly into the floor for months and the repair bill has just landed. Sometimes it’s a tiled deck letting water into the room below. Whatever the trigger, the membrane is the part of the job nobody sees and everybody relies on. Get it right and the room stays dry for decades. Get it wrong and you’re pulling up tiles you only just paid for.
What we handle
Wet areas we waterproof
We’re certified waterproof membrane installers, and wet-area waterproofing is core to what we do, not a sideline. Here’s where we put membranes down, and how we make sure they actually hold.
Showers and wet rooms
A tiled shower is the hardest-working wet area in the house, so it’s where we’re fussiest. We line the floor and walls with a certified membrane, tape and reinforce every internal corner, and build the falls so water runs to the waste instead of sitting in the screed. Open wet rooms with no shower tray get the whole floor tanked, not just the cubicle. This is the detail that decides whether your shower lasts twenty years or leaks into the hallway.
Bathroom and laundry floors
Picture the floor around a vanity, a toilet or a laundry tub. Every one of those is a fixture water can escape from. Under clause E3 of the Building Code, bathrooms and laundries are wet areas that need impervious, easily cleaned surfaces, which in practice means a membrane under the tiles. We waterproof the full floor, turn the membrane up the walls, and seal tight around every penetration so a slow drip never becomes a rotten subfloor.
Kitchens and internal splash zones
Does a kitchen really need waterproofing? Around the sink, the dishwasher and any tiled floor, more often than people expect. Leaks under kitchen units go unnoticed for years because the cabinetry hides them. So we membrane the at-risk zones, seal the junctions where the floor meets the joinery, and make sure an overflow ends up on the tiles rather than soaking into the floor structure.
Balconies, decks and tiled outdoor areas
Tiled decks and balconies are a different beast, because now you’re dealing with clause E2 and the weather. These sit in the external envelope, so the membrane has to be a weathertight system, usually one with a BRANZ appraisal, not an internal product pushed outside its limits. We fall the deck for drainage, detail the upstands and the door threshold properly, and tie it back to the building so water can’t track into the room underneath.
Substrate prep and detailing
None of the above works without the boring bit underneath. We get the substrate sound and clean, prime it, install bond breakers at the changes of plane so movement doesn’t tear the membrane, reinforce the corners and penetrations with bandage, and let each coat cure before the next. A membrane is only ever as good as the surface it’s stuck to and the detailing at the edges. That’s where we spend the time.
Fixing failed waterproofing
Already got a leak? We find them and fix them. A musty smell, a soft patch of floor, tiles sounding hollow, paint bubbling on the far side of a shower wall: usually the membrane was skipped, skimped, or never detailed at the corners. We strip back to the substrate, work out what actually failed, and rebuild the wet area properly with a membrane system that carries a warranty. No band-aid over the top and hope for the best.
Waterproofing across Auckland
We waterproof wet areas right across Auckland. South and East Auckland jobs in Papakura, Takanini, Manukau, Howick, Pakuranga and Botany. Central work in Remuera, Ellerslie, Epsom and Mount Eden. Plenty out west in Henderson and New Lynn, and up on the North Shore too.
Auckland’s humidity and rainfall make moisture detailing matter more here than in the drier parts of the country, which is exactly why we don’t cut corners on it. Not sure we reach your street? Ask. The answer’s usually yes.
How it works
What to expect
Quote and plan
We come out, look at the wet areas, check the substrate and the falls, and give you a clear written quote with a realistic timeline. If something in the existing build worries us, you’ll hear about it then, not later.
Prep and prime
We get the substrate sound, clean and dry, fix any falls that aren’t right, then prime so the membrane bonds. Bond breakers and corner reinforcing go in before a drop of membrane.
Membrane and cure
We apply the certified membrane in coats, turn it up the walls and around every penetration, and let each coat cure properly. We don’t tile on a membrane that isn’t ready, whatever the schedule says.
Test and tile
Where it matters we flood-test the floor to prove it holds, then move on to the tiling, confident that what’s underneath is sound. Same crew, so nothing gets lost between trades.
Done properly
Why choose Hi Tech Tiling
We’re certified waterproof membrane installers, and we treat the membrane as a system: substrate prep, primer, bandage, membrane, and sealant at every junction, so there’s no weak point hiding under your tiles. We use products that comply with AS/NZS 4858 and carry both a manufacturer and a workmanship warranty, and we install them to the Internal Wet-area Membrane Code of Practice and the Building Code’s moisture rules, clause E3 inside and E2 for decks. That matters more in Auckland than most places. The humidity is relentless, and the leaky-building years taught the whole country what hidden moisture does to a timber-framed house once it gets in and stays.
A solid share of our work comes through builders and construction companies who can’t afford a callback, which tells you how seriously we take this layer. We stand behind the work, we’re local and easy to reach, and because the same crew waterproofs and tiles, the responsibility never gets passed around when something needs sorting.
Good to know
Waterproofing questions, answered
Is waterproofing a legal requirement for a bathroom?
In practice, yes. The Building Code’s clause E3 requires wet areas like bathrooms and laundries to have impervious surfaces and to manage moisture, and a council inspector will expect a compliant under-tile membrane in any new or renovated wet area. We install it as a certified system and can give you the paperwork to prove it was done.
Can’t I just use waterproof grout instead?
No, and it’s the most common myth we hear. Grout and tiles are porous, so water works through them over time. The grout is the finish, not the barrier. The waterproofing is the membrane underneath, and there is no grout on the market that replaces it.
How long does waterproofing take to cure before tiling?
Depends on the product and the weather. Most membranes want a day or two of curing per the manufacturer, sometimes longer in a cold, humid Auckland winter. We follow the cure times to the letter, because tiling onto a membrane that hasn’t set is one of the surest ways to make it fail.
Do you waterproof tiled decks and balconies?
We do, with the right system for the job. Decks sit in the weathertight envelope, so they fall under clause E2 and need an external-grade, usually BRANZ-appraised membrane with proper falls and detailing, not an internal product pushed outside. We’ll tell you straight if a deck needs more than a membrane to be sound.
My shower is leaking. Can you fix it without a full re-tile?
Sometimes, but be wary of anyone who promises it. If the membrane has failed, the honest fix is to strip the tiles back, sort the waterproofing and detailing, and re-tile. Surface sealers and regrouting can buy time on a minor issue, but they won’t fix a failed membrane, and we won’t pretend otherwise.
Do you do the waterproofing and the tiling, or just one?
Both, and that’s the point. When one crew waterproofs and then tiles, the membrane gets protected and detailed exactly the way the tiling needs, and there’s nobody to blame-shift to if a problem ever shows up. You get a single point of accountability for the whole wet area.
Talk to Hi Tech Tiling
Planning a bathroom, a wet area or a tiled deck? Talk to us before the tiles go down, that’s when waterproofing is easiest to get right. Call 021 681 166 or send through the details.
Hi Tech Tiling, 3 Bellfield Road, Ōpaheke, Auckland 2113. Phone 021 681 166.