This waterproofing treatment is a standard approach to prevent seepage of water from terrace area during new construction and renovation. This waterproofing treatment process includes: 1. Back filling and PCC Work 2. Surface drying and preparation for coating 3. 1st layer of chemical coating in mix with cement slurry 4. Concrete chamber construction work at corner areas with cement mortar in mix with waterproofing chemical 5. 2nd layer of chemical coating 6. Drying and surface finishing 7. Water ponding test