Waterproofing

Water damage is one of the most common — and most disruptive — problems in Singapore homes, and it almost always traces back to failed waterproofing. Bathrooms, balconies and planter boxes take constant exposure to water, and over the years the protective membrane beneath the tiles breaks down, letting water seep into the structure and, in HDB flats and condos, into the unit below. Our waterproofing service finds the source and fixes it properly, with durable membranes backed by a workmanship warranty — available on demand across the island.

Crucially, we don’t just patch and repaint over a stain — that hides the problem while the water keeps tracking through the structure. We diagnose why the water is getting through, then treat the cause so it stays fixed.

What our waterproofing covers

• Bathroom and toilet floors — the most common source of leaks
• Balconies, planter boxes and roof terraces
• Leak detection and targeted repair
• Kerbs, floor traps and pipe penetrations — common weak points
• Re-tiling and reinstatement after treatment

Signs you need re-waterproofing

Waterproofing fails gradually, so the warning signs build over time. The clearest is ceiling stains in the unit below — brown rings or damp patches that indicate a failing membrane above. Others include a persistent musty smell from trapped moisture; lifting, cracked or hollow-sounding tiles where water has weakened the bond; white, chalky efflorescence at grout lines as salts are carried through the screed; and recurring mould at corners and skirting that returns no matter how often you clean it. Catching these early keeps the repair contained; ignoring them lets the water spread and pushes up the cost.

Understanding inter-floor leaks

In HDB flats, a wet or stained ceiling is almost always an inter-floor leak — water from the bathroom or floor of the unit above seeping through a deteriorated membrane. The lasting fix is to re-waterproof the floor at the source in the upper unit, not simply to repaint the affected ceiling below. We help homeowners resolve these correctly and durably, and can advise on the practical steps involved.

Our waterproofing process

First we assess the extent and the source, and advise honestly — some cases need only targeted treatment around a floor trap or kerb, while others need a full strip and re-membrane. We then prepare the surface, apply the waterproofing membrane with proper attention to the corners, kerbs and pipe penetrations where leaks usually start, water-test where appropriate, and reinstate tiling to a clean finish. The completed work is backed by a warranty. Most HDB bathrooms are completed within a few days, allowing for proper curing time.

What affects the cost

Waterproofing cost depends on the area size, the extent of the failure, whether tiles must be hacked and replaced, and the type of space — a bathroom differs from a balcony or planter box. The single biggest lesson homeowners learn is that the cheapest job is the one that lasts: a proper membrane and a warranty cost a little more up front and far less than doing the whole thing again in a year.

Why choose wefix for waterproofing

We trace the real source, use quality warrantied membranes, and reinstate neatly. Our assessments are honest — if you only need targeted treatment, that’s what we’ll quote, not a full hack. And because the same team also tiles, repaints and repairs, we can put the whole affected area right in one project.

Common questions

Do I need to hack the whole floor? Not always — we assess first and advise on targeted treatment versus a full re-membrane. Is the work warrantied? Yes, our waterproofing comes with a workmanship warranty. How long does it take? Most HDB bathrooms are done within a few days, allowing for curing.

On demand, island-wide across Singapore

We waterproof bathrooms, balconies and more for HDB, condo, landed and commercial properties across Singapore, with fast response when a leak needs attention.

Learn more

Read the 5 signs your bathroom needs re-waterproofing, what it costs, and how to handle an inter-floor ceiling leak. Get a free assessment today.

Warranty and aftercare

Because waterproofing is hidden beneath your tiles, you can’t easily inspect it — which is exactly why the warranty and the quality of the work matter so much. We back our waterproofing with a workmanship warranty and will explain the coverage clearly in your quote. Good aftercare on your part is simple: keep floor traps clear, address any new leaks promptly, and don’t ignore early warning signs, so small issues never get the chance to become big ones.

Who we help

We waterproof bathrooms, balconies, planter boxes and more for HDB flats, condominiums, landed homes and commercial properties across Singapore.

More questions answered

Will you need to hack all my tiles? Not always — targeted treatment is sometimes enough, and we’ll advise honestly after assessing. Can you fix the ceiling stain in the unit below too? The lasting fix is at the source in the upper unit; once that’s done, the ceiling below can be dried and repainted. How soon can I use the bathroom after? After the membrane has cured and the reinstatement is complete — we’ll give you a clear timeline.