No-Hacking PU Injection in Singapore
Stop leaks without breaking tiles. Advanced chemical grouting is injected directly into the leak path, where it expands and cures into a watertight seal — no demolition, no dust sheets over your whole flat, and no week-long renovation to fix a single wet patch.
No-hacking is likely a fit if
- Your tiles are still sound and you do not want them removed
- The leak traces to a crack, joint or pipe penetration
- Water appears on the ceiling of the unit below
- You cannot move out for a week of renovation works
- A previous surface patch or repaint did not hold
- You want the room usable again the same day
What "no hacking" actually means
The traditional fix for a leaking bathroom or slab is to hack off the tiles, strip the screed, lay a fresh membrane and re-tile. It works, but it turns a leak into a renovation: a week of noise, a flat full of dust, tiles you may no longer be able to match, and a bill dominated by reinstatement rather than waterproofing.
No-hacking waterproofing takes the opposite route. Instead of removing the surface to reach the leak, we go through it. Small injection ports are drilled along the crack or joint — often straight through a grout line — and polyurethane resin is pumped in under pressure. The resin travels the full depth of the void, reacts with the moisture already there, and foams into a flexible, permanently watertight seal from the inside out.
Because the seal forms where the water actually travels, it addresses the leak path rather than covering the symptom. And because nothing is demolished, your tiles, your grout lines and your skirting all stay exactly as they were.
Where chemical grouting excels
- Inter-floor leaks between an HDB or condo unit and the one below
- Active cracks in slabs, beams, columns and retaining walls
- Construction and cold joints that weep after heavy rain
- Leaks around pipe penetrations and floor traps
- Planter box and balcony upstands next to living areas
- Basement, lift pit and car park seepage under water pressure
Injection vs hacking and re-tiling
Both fix leaks. They differ enormously in what they cost you in time, mess and money — and in when each one is actually the right call.
No-hacking PU injection
- Typically completed in a single day
- Tiles, grout and skirting left untouched
- No debris, no chute booking, no dust sheets everywhere
- You stay in the property throughout
- Cost concentrated on the repair, not the reinstatement
- Best for cracks, joints, penetrations and inter-floor leaks
Hacking and full re-do
- Usually five days to two weeks
- Tiles removed and replaced — matching old tiles is often impossible
- Significant debris, noise and dust
- The room is out of use for the duration
- Reinstatement often costs more than the waterproofing
- The right answer when the membrane has failed across the whole area
Our no-hacking process
- 1
Non-destructive tracing
Moisture meters and thermal reading find the leak path without opening anything.
- 2
Set the ports
Small packers are drilled along the crack, often through the grout line.
- 3
Inject the resin
PU is pumped under pressure until it fills the void to full depth.
- 4
Cure and test
The resin foams and sets, then we water-test to confirm the seal.
- 5
Make good
Ports are removed, the surface is finished and your warranty is issued.
No-hacking waterproofing FAQs
Still unsure whether your leak qualifies? Send us a photo and we will tell you within the hour.
Read the full explainer
Our guide walks through the cases where going without hacking works — and the ones where it does not.
Does no-hacking waterproofing really work, or is it a shortcut?
It is a different tool, not a cheaper shortcut. PU injection seals the leak path inside the concrete, which is exactly where most inter-floor and crack leaks travel. For those cases it outperforms a surface coating. What it cannot do is replace a waterproofing membrane that has failed across an entire bathroom floor — we will tell you honestly which situation you are in.
How long does it take and can I stay at home?
Most single-area injection jobs are completed within a day, and many within three to four hours. There is no tile removal, no debris chute and no cement dust, so you can stay in the property throughout. The bathroom is usually usable again the same evening.
Is it cheaper than hacking and redoing the waterproofing?
Almost always, because the cost of hacking is rarely the hacking itself — it is the new tiles, the tiler, the disposal, the reinstatement and the week you cannot use the room. Injection removes most of that. We quote both options where both are viable so you can compare properly.
Will I be able to see where the work was done?
Only if you look for it. We drill small injection ports along the crack line and make them good afterwards. On a tiled surface we work through the grout line where possible, so the finish stays intact.
What if injection does not stop the leak?
Then we escalate to the next method and tell you before we start what that would involve and cost. Our 12-month written warranty covers the workmanship either way — you are not paying twice for the same leak.
When is hacking genuinely unavoidable?
When the membrane under a bathroom floor has broken down across the whole area, when the screed is saturated and crumbling, or when tiles are already drummy and lifting. In those cases injection would only buy a few months, and we would rather say so upfront.
Related services
All servicesPU Grouting & Crack Injection
Polyurethane injection that fills and seals cracks from within the concrete — fast, targeted relief for active leaks.
Bathroom & Toilet Waterproofing
Stop seepage into bedrooms and ceilings below with a fully bonded membrane system — often without hacking the whole floor.
HDB Ceiling Leak Solutions
The HDB-specific route: joint inspection with your neighbour, cost-sharing explained, and a repair done from below.
Find out if your leak can be fixed without hacking
Send one photo and we will tell you honestly. Free assessment, no obligation, and a 12-month written warranty on everything we seal.