If you live in an HDB and notice yellowish water stains on your ceiling, PU injection grouting is often the recommended fix for inter-floor leaks. Since the repair can be done from the lower unit’s ceiling, it minimizes disruption for the neighbor upstairs. The process is remarkably fast—most residential jobs are completed within 2 to 4 hours. Because it requires no heavy machinery or... https://shakuraconstruction.sg/services/pu-injection-grouting/