Concrete Flat Roof Slab Waterproofing for a Block of Flats This multi-unit residential building required specialised flat concrete roof waterproofing using SealPro’s advanced ArmTec HyperFlex system. EcoSeal’s comprehensive approach included thorough cleaning, removal of loose debris and deteriorated waterproofing, and correction of drainage levels. Installation of 45-degree flashings on parapet walls ensured proper water management,