Waterproofing

Remedial Waterproofing on the Northern Beaches

When waterproofing fails, water goes where it shouldn’t — into bathrooms, basements, walls and the structure itself. We find where the membrane has failed and re-waterproof it properly, for homes across the Northern Beaches and North Shore.

Book a Site Assessment

See Our Remedial Projects

or call 02 9940 2229

The Signs

If a membrane has failed, the water shows up somewhere it shouldn’t.

Most water problems in a home come down to waterproofing that was wrongly detailed, has aged, or was never there. Once water gets past the membrane it tracks into finishes, walls and structure — and it won’t stop until the barrier is restored.

Water stains on walls or ceilings

From a wet area, roof or deck above.

Damp or musty bathrooms

Moisture escaping the shower or floor.

Efflorescence in basements & garages

Salts from water pushing through below-grade walls.

Bubbling paint & lifting tiles

Moisture trapped behind the finish.

Leaks through retaining walls

Below-grade water with nowhere to go.

Persistent damp after “repairs”

Patched over instead of properly re-membraned.

A watertight home starts at the membrane — patching the surface just moves the problem.

What We Waterproof

Every wet area and below-grade surface, done properly.

We diagnose the failure, strip back to a sound substrate, and install a correctly-detailed membrane that lasts.

Bathrooms & wet areas

Showers, floors and walls re-waterproofed to standard.

Basements & below-grade

Tanking and drainage for dry, usable lower levels.

Retaining walls

Waterproofing and drainage so water doesn’t track through.

Roofs, decks & planters

Flat and trafficable membranes that shed water.

Internal wet-area re-tiling

Strip, membrane and re-tile as one coordinated job.

Balconies

Balconies have their own dedicated repair page.

Balcony Waterproofing →

How We Work

Diagnose, strip back, re-membrane, finish.

Waterproofing is only as good as the layer you can’t see — so we fix it in the right order.

Site assessment

We inspect and find where water is getting through.

Diagnosis & scope

Confirm the failure point and define the works, with an itemised quote.

Strip back & prepare

Remove finishes and failed membrane; repair the substrate.

Waterproof & detail

New membrane with correct falls, junctions and drainage.

Finish & handover

Re-tile / finish and hand back a watertight area, with documentation.

“

Our downstairs bathroom had been leaking into the wall for years and two “repairs” hadn’t held. Beaches Group stripped it back, re-membraned it properly and re-tiled — completely dry since, and done in a matter of days.

— Stella, Palm Beach

NORTHERN BEACHES SPECIALISTS

Coastal homes are hard on membranes.

We re-waterproof homes across the Northern Beaches and North Shore — where salt, humidity and heavy rain shorten the life of membranes and detailing, from bathrooms to basements to retaining walls.

Palm Beach
Avalon
Mona Vale
Mosman
Manly
Freshwater
Newport

Why Beaches Group

Why homeowners trust us to make it watertight.

Waterproofing only holds if the failure point is found and the detailing is right. Here’s what sets our repairs apart.

We find the actual failure

Diagnosis first, so we fix the cause, not the symptom.

Done once

A correctly-detailed membrane and drainage, not another patch.

Detailing where it counts

Junctions, penetrations and falls are where waterproofing fails.

One coordinated job

Strip, membrane and re-tile handled by one team.

Documented

A clear record of the repair for you and any insurer.

Common Questions

Waterproofing, answered.

Why does waterproofing fail?

Usually because the original membrane was wrongly detailed (junctions, penetrations, falls), has aged past its life, or was never installed to standard. Water finds any weakness. We diagnose exactly where and why before we quote.

Can you re-waterproof without a full rebuild?

Often, yes — but a real fix usually means lifting the finishes to replace the membrane underneath, because that’s where the failure is. We’ll tell you honestly what your bathroom, basement or wall needs at the assessment.

Do you fix bathroom and shower leaks?

Yes — leaking showers and wet-area floors are one of the most common jobs. We strip back, install a new membrane to standard, and re-tile so it’s watertight and looks right.

What about my balcony?

Balconies have their own dedicated page and are one of our most common waterproofing repairs — see our Balcony Waterproofing service for the detail.

How much does waterproofing repair cost?

It depends on the area, access and whether there’s structural damage underneath, so we price against your home after a site assessment and give you an itemised scope before any work starts.

Where do you work?

The Northern Beaches and Sydney’s North Shore — coastal conditions here are hard on membranes and detailing.

Water Getting In?

Book a site assessment.

Send us a few photos and where you’re seeing water, and we’ll assess it. Or call 02 9940 2229.