# HDB Waterproofing and Leak Repair | Ceiling Leaks, Spalling, GRA | Seepwise > Leak repair and waterproofing for HDB flats: ceiling leaks, spalling concrete, toilet re-waterproofing, and the rules on who pays, GRA and warranties. URL: https://waterproofing.affiliateinsider.buzz/service-areas/hdb-flats/ - Home - / Homes we cover - / HDB flats # HDB Waterproofing and Leak Repair Most HDB leaks have a rule that decides who pays. Start there, then fix it properly. [Request an inspection](#request) Stain spreading under the toilet above The classic inter-floor leak, shared between the two owners. Ceiling plaster cracking over rusty bars Spalling concrete, most common in bathrooms. Top-floor ceiling wet after rain A roof leak: the Town Council's job, not yours. Damp wall on the outside face Facade seepage, also the Town Council's. [Seepwise](/) covers leak repair and waterproofing for hdb flats across Singapore. Here is what is different about hdb flats, and who is responsible for what. ## What makes leaks in hdb flats different HDB puts it plainly: ceiling leaks are particularly common in older flats, especially in wet areas like bathrooms and toilets, because the waterproofing membrane and screed in floor slabs wear down over time ([HDB](https://www.mynicehome.gov.sg/hdb-how-to/maintain-your-flat/)). Older estates built decades ago are where this shows first, and where spalling concrete, which HDB attributes to embedded steel bars deteriorating, appears most in bathroom ceilings. HDB flats run on a clear division of responsibility. Owners look after the inside of the flat, including floor and wall finishes, windows and sanitary fittings. The Town Council looks after common areas, corridors, void decks and the external facade walls. The floor slab between two flats is shared by the owners above and below ([HDB](https://www.mynicehome.gov.sg/hdb-how-to/maintain-your-flat/)). Getting the leak to the right party first can save you the whole bill. Newer flats carry protection worth checking before you spend anything: a one-year defects liability period, then HDB's warranty of 5 years for ceiling leaks and external seepage and 10 years for spalling concrete. HDB states the ceiling-leak warranty ceases if floor tiles are changed or the waterproofing system is tampered with ([HDB](https://www.mynicehome.gov.sg/hdb-how-to/maintain-your-flat/)), so report first, renovate later. ## Who is responsible for what Situation Who is responsible Ceiling leak from the flat above Shared by upper and lower owners; HDB's GRA has co-paid 50% Ceiling leak caused by renovation upstairs Upper owner, full cost Top-floor leak from the roof Town Council External facade wall cracks and seepage Town Council Spalling concrete inside the flat Owner; GRA co-pays 50% after the defects period Windows, floor and wall finishes, sanitary fittings Owner ## Services for hdb flats - Ceiling leak repair: Find where the water enters, fix it at the source, and know who pays before work starts. - Toilet waterproofing: A wet area that stays dry for years needs three things done in order: membrane, screed, test. - Spalling concrete repair: Cracked or bulging ceiling plaster over rusty steel is spalling. It spreads if left. - Water leak detection: Find it before you hack it. Detection is cheaper than opening the wrong wall. - PU injection leak repair: Seal the crack the water travels through, without hacking the floor. Good for the right leak, wrong for a failed membrane. ## Guides for hdb flats - Is My BTO Leak Covered by HDB's Warranty? - Who Pays for an HDB Ceiling Leak? - Do You Need an HDB Permit for Toilet Waterproofing? - Does HDB Pay for Spalling Concrete Repairs? - Top-Floor HDB Ceiling Leak: Who Fixes the Roof? Leak in your hdb flat? A specialist calls you back to book an inspection. Request received. A specialist will contact you on the number you gave. If water is near electrics, switch off that circuit at the distribution board and keep clear until then. ## Questions about hdb flats Who pays for a ceiling leak between two HDB flats? + Both owners share responsibility for the slab. Under HDB's Goodwill Repair Assistance, HDB has co-paid 50%, with the rest split between the upper and lower owners. If renovation upstairs caused it, the upper owner pays in full. Does HDB fix spalling concrete? + During HIP it is fully funded. In new flats it is under a 10-year warranty. Otherwise owners can ask for Goodwill Repair Assistance, where HDB co-pays 50%. Do I need an HDB permit to redo my toilet waterproofing? + If the floor is hacked, generally yes; your renovation contractor applies for it. My top-floor ceiling leaks when it rains. Who do I call? + Your Town Council. The roof is common property, and HDB directs roof-related leakage to the Town Council. What does a toilet re-waterproof cost in an HDB flat? + Published 2026 contractor guides put the waterproofing package at about S$800 to S$2,500 per toilet, plus S$800 to S$1,500 for hacking and disposal. GST and re-tiling may be extra. ## Other homes we cover [CondominiumsIn a condo, the first question is whether the leak starts in a unit or in common property.](/service-areas/condominiums/)[Landed homesNo Town Council, no MCST. In a landed home, every leak is yours to fix, starting with the roof.](/service-areas/landed-homes/) Leak in your hdb flat? Start with the source. A specialist calls you back to book an inspection. Tell us what you see and the type of home. [Request an inspection](/contact/#request)