Why Does HDB Require You to Hack Your Toilet?
If you live in an HDB flat in Singapore and your toilet waterproofing fails, water can seep through the floor and stain your downstairs neighbour’s ceiling. When this happens, HDB will require you as the upstairs resident to rectify your waterproofing system to stop any water leaks that is affecting your neighbour below. The most commonly recommended method is to hack and redo your toilet floor to install a new waterproofing membrane. In short, refurbishing your toilet entirely as this waterproofing membrane that require replacing sits below your current toilet tiles.
What Is a Waterproofing Membrane?
A waterproofing membrane is a protective layer in a thick liquid form, applied on the concrete slab before tiles are laid. Once cured, it forms a barrier that prevents water from penetrating porous concrete and leaking downward.
- Position: In between the concrete slab and tiles
- Lifespan: Typically 10 to 15 years, can be as short as a year if not maintained
- Why It Fails: Other than the expiry of lifespan, damaged grout lines is the primary reason why waterproofing fail much earlier, it allow water to collect beneath tiles, promoting bacteria and mold growth. Over time, this deteriorates the membrane, allowing water to seep through and stain ceilings below.
The Traditional Hacking Process
To replace the waterproofing membrane, contractors must hack off all floor tiles. Here’s what to expect:
Timeline
- One toilet: 3–4 days
- Two toilets: 7–8 days total
You’ll need to take leave or ensure someone is home for access.
Step-by-Step Process
Preparation and Protection
Contractors will cover your furniture and nearby areas with plastic sheets to minimise dust and debris.
Note: This protection is not perfect—fine dust can still settle on surfaces, so expect some cleaning afterward.
Day 1: Tile Hacking and Debris Removal
Workers start by removing the existing floor tiles and sometimes wall tiles if required.
This involves heavy drilling and chiselling, creating loud noise and significant dust. If there are infants or elderly at home, this will bee disturbing to them.
Broken tiles and debris are collected and disposed of, which can take several hours.
Day 2: Waterproofing Membrane Application
After clearing the surface, the contractor applies a liquid waterproofing membrane directly onto the concrete slab.
The membrane needs time to cure and form a solid barrier, usually left overnight to ensure proper bonding.
Day 3: Tile Installation
New tiles are laid over the cured waterproofing membrane.
Grouting is done to seal gaps between tiles.
The toilet bowl and other fixtures are reinstalled.
Day 4: Curing and Final Touches
Tiles and grout need at least 24 hours to set before the toilet can be used.
Contractors will clean up the area, but expect some residual dust and minor touch ups.
Important: If two toilets need hacking, this entire process repeats for the second toilet, extending the total downtime to about 7–8 days.
Challenges
- Dust and noise
- Major disruption to daily life
- High cost (average $3,000 per toilet)
Is There a Better Way? Introducing SpongeFusion™
Instead of hacking, VH Waterproofing Solutions offers SpongeFusion™, a proprietary no-hacking waterproofing method that seals from within.
How SpongeFusion™ Works
- Diagnostic first: We check for pipe leaks before waterproofing. This is to ensure that the water leak is not from a water pipe leak as SpongeFusion™ is not effective in stopping a pipe leak. We will instead deploy our plumber to get the pipe fixed and monitor if the water leak issue is eliminated.
- Deep absorption: Your toilet floor will be like a sponge, SpongeFusion™ will be absorbed into all porous holes and hairline cracks on your floor forming an internal waterproof seal after it dried up.
- Quick process:
- Takes about 3 hours in the morning
- Toilet ready for use by evening (avoid splashing water during curing)
- Minimal disruption: No hacking, no dust, no noise.
- Warranty: 3-year waterproofing, extendable via Seal-Care™ Maintenance Programme.
Benefits
- No hacking or tile removal
- Fast turnaround
- Long-lasting internal seal
- Cost-effective compared to full renovation
Conclusion
Hacking your toilet is effective but disruptive, messy, and expensive. With SpongeFusion™, you can stop leaks quickly and confidently without tearing up your home and frustrating your family members
Contact VH Waterproofing Solutions today for a diagnostic check and experience the future of waterproofing in Singapore.
SpongeFusion™: absorbed like a sponge. Because you seal from within. You seal with confidence.
