When your waterproofing layer has given up

Most Guwahati terraces have 2–3 failed waterproofing attempts layered on top of each other. Heat, UV, and ponding water degrade membranes within 5–8 years if not maintained.

Symptoms

• Multiple repair patches visible on terrace
• Membrane bubbling or peeling
• Green moss growth on terrace surface
• Leak returns within one monsoon of repair

Diagnosis

Core samples where possible, adhesion tests, and drainage assessment. Full system redesign vs localized repair decided on inspection.

Which waterproofing lasts longest on terraces?

PU liquid membrane or multilayer bituminous with protection tile — depends on traffic and budget.