Best Practices

Notary Case of Waterproofing Layer Leakage

Waterproofing failure is one of the most insidious yet destructive sources of seepage in Hong Kong buildings. Unlike a burst pipe, it develops slowly beneath bathroom floors, roof membranes, pool bases or balcony tiles, gradually eroding the structure until stains appear months or even years later. Our waterproofing assessment uses ponding tests, infrared thermography, moisture metering and selective openings to evaluate the condition and remaining lifespan of the waterproof layer. Whether traditional bitumen membranes, polyurethane coatings or modern cementitious systems, we identify whether the cause is poor workmanship, material ageing or physical damage, and assess repair options and costs. Each case presents a clear investigation logic, liability analysis, and the key details that helped clients pursue warranty claims against developers, lodge insurance claims, or agree comprehensive repair plans with the owners' corporation.