PU injection grouting is a powerful solution in roof leakage repair. It fills hidden cracks inside concrete roofs, expands to block water pathways, and hardens like a waterproof barrier. This method is especially useful for flat roofs, lift pits, and areas where leaks are hard to detect. PU injection offers long-term leakage control without removing the roof surface, saving time and r... https://shakuraconstruction.sg/services/roof-leakage-repair/