HDB & Condo Waterproofing

Toilet Waterproofing & HDB Leak Repair

Ceiling leaking from upstairs? Grout crumbling? Get no-hack waterproofing from $300 — PU injection, flood infusion, or full hack. Serving HDB flats and condos islandwide.

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💰 PU Injection from $300 · Flood infusion $600–$1,500 · Full hack & membrane $1,500–$4,000+ · HDB GRA scheme assistance available (capped at ~$350/toilet)

Waterproofing Services

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PU Injection / Crack Grouting

Targeted injection into ceiling and floor cracks — no hacking, 1-day job, 3–5 year warranty. From $300.

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Flood Infusion / Chemical Waterproofing

Chemical solution floods floor joints to seal nano-cracks without tile removal. $600–$1,500 per toilet.

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Full Hack & Re-Waterproof

Complete floor hacking, screed removal, new membrane (PU/cementitious), ponding test, and retiling. $1,500–$4,000+.

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Ceiling Patch & Repaint Repair

Repair downstream damage — cut out wet plasterboard, replace drywall, seal, prime, and repaint. $300–$1,500.

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Water Pipe Leak Detection

Non-destructive leak detection plus exposed or hidden pipe repair. From $140.

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Balcony & Wet Kitchen Waterproofing

For condos and HDB flats with external wet areas. Larger surface area — typically $1,500–$3,000+.

Not sure what type of waterproofing you need?

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Describe the leak — Unkle will route you to the right specialist.

Common Questions

My HDB toilet ceiling is leaking from above — who pays?
For HDB flats, upper and lower units split costs 50/50. HDB's Goodwill Repair Assistance (GRA) scheme covers most of it — each owner is capped at around $350 per toilet. If you're on the top floor, the Town Council pays.
How much does no-hack toilet waterproofing cost?
No-hack flood infusion or chemical grouting costs $600–$1,500 per toilet. PU injection starts at $600 for one toilet or $950 for both (e.g. Sin Jit Seng, XRY, DryProof pricing). This is for HDB flats across Tampines, Jurong, Woodlands, and all SG areas.
Should I use flood infusion or full hacking?
Flood infusion is faster, cleaner, and cheaper ($600–$1,500) but works best for minor to moderate leaks. Full hack, membrane replacement, and retiling ($1,500–$4,000) is the permanent solution for severe slab or drainage failure.
My upstairs condo neighbour refuses to fix their toilet leak — what can I do?
Under the BMSMA, the upper unit is presumed liable. Escalate via your MCST or managing agent, then file with the Strata Titles Board (STB) with a $500 filing fee. You can claim up to $20,000 via the Small Claims Tribunal. Mediation takes 4–8 weeks.
Is there emergency waterproofing that can come today?
Yes. Several Singapore contractors offer same-day inspection. WhatsApp response is typically within minutes, with on-site visit within 2–4 hours for urgent cases like active leaks or mold growth — from Bedok to Yishun, all areas covered.
What's the difference between PU injection and traditional waterproofing?
PU injection targets specific cracks from below — no hacking, $300–$1,000, completed in 1 day. Traditional waterproofing involves hacking the floor, applying a new PU/cementitious membrane, ponding test, and retiling — $1,500–$4,000. PU is faster but may not address widespread membrane failure.
My BTO flat is leaking — is the developer responsible?
Yes — within the 12-month Defects Liability Period (DLP), the developer covers defective waterproofing. Document defects and submit before DLP expires. Post-DLP wear and tear falls on you or your neighbour.

Got a Leaky Toilet?

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