To fix leaking concrete roofs, first inspect for cracks, joints, or flashing damage. Apply a high-quality polyurethane or epoxy sealant to cracks, ensuring full coverage and overlapping layers. For joints, use a concrete caulk or grout repair product. Replace damaged flashing with galvanized metal and secure it properly. If water pooling occurs, install a drainage system or extend downspouts. For severe leaks, consult a professional roofer to assess structural integrity and recommend repairs like waterproof coatings or membrane installation.

Leaking concrete roofs often stem from structural cracks, worn flashing, or improper installation. According to the National Roofing Contractors Association (NRCA), 80% of roof leaks originate from flashing issues, which are common in concrete roofs due to expansion and contraction. Epoxy sealants, which bond chemically with concrete, provide long-term durability (10–15 years) and resist UV exposure, as noted in a 2021 study by the Journal of Building Engineering. However, DIY repairs may fail if cracks are wider than 1/4 inch, requiring professional-grade materials. Data from the U.S. Census Bureau reveals that 35% of homeowners avoid professional repairs, risking costly water damage averaging $5,000–$10,000 per incident. Regular inspections (every 6–12 months) and prompt repairs reduce long-term costs by 40–60%, per the Insurance Institute for Highway Safety. While sealants and flashing replacements are cost-effective, structural repairs demand expertise to prevent recurring leaks.