In Singapore, the Housing and Development Board (HDB) waterproofing is a very important segment of building repair as it helps avoid water leakage and moisture formation and commonly used in wash areas and roofs. In general, the necessary waterproofing preserves the performances of the construction and provides comfortable and safe living conditions of residents. Here are common HDB waterproofing methods: 1. Liquid Waterproofing Membrane Application: Liquid based waterproofing is one that is