For flat concrete roofs that experience water pooling, roof waterproofing often involves a "torch-on" bitumen membrane. This heavy-duty method uses a thick, multi-layered sheet that is heat-welded onto the roof substrate with a torch. The result is a rugged, impenetrable surface that can withstand standing water and foot traffic. It is a time-tested solution for RC (Reinforced Concret... https://shakuraconstruction.sg/services/roof-waterproofing-and-repair/