At St. Abda Church, we carried out waterproofing works critical to preserving the historic structure’s foundations and underground areas. The main challenge was applying a waterproofing system that respected the building’s architectural heritage while providing modern protection against moisture infiltration. To solve this, we selected flexible, breathable waterproofing membranes compatible with the church’s materials, ensuring both effective moisture resistance and preservation of the structure. Our careful installation and attention to detail helped protect the church for future generations.