Inter-floor leakage is a common headache in Singapore, but PU injection grouting provides an easy resolution. This method is frequently recommended by waterproofing specialists to fix leaks coming from the neighbor's unit above. Instead of a full toilet renovation, technicians inject PU resin into the ceiling slab. The foam expands to block water paths around floor traps and sanitary ... https://shakuraconstruction.sg/services/pu-injection-grouting/