To address water leakage on a balcony, first inspect for cracks or gaps in the balcony floor or walls. If present, seal these areas using waterproof epoxy or silicone caulk. Next, check for damaged or missing flashing around the edges of the balcony. Replace or repair flashing with metal strips to direct water away from the structure. Ensure proper drainage by installing a sloped surface or a drainage system, such as a French drain or grated沟槽, to channel water away from the building foundation. If the issue persists, consult a professional to assess underlying issues like improper waterproofing or structural damage.

Water leakage on balconies often stems from inadequate drainage systems and compromised waterproofing. According to the International Association of Certified Home Inspectors (IAC4), 60% of balcony leaks are caused by faulty flashing, which fails to redirect water effectively. Additionally, the Environmental Protection Agency (EPA) reports that improper drainage can lead to a 70% increase in water retention, accelerating mold growth and structural decay. Waterproof epoxy and silicone caulk are cost-effective solutions for minor cracks, but persistent leaks may require professional intervention, such as applying liquid-applied waterproofing membranes or installing subsurface drainage. Proactive maintenance, including regular inspections and timely repairs, can prevent costly repairs and ensure longevity. For example, a 2021 study by the National Association of Home Builders found that addressing balcony leaks early reduces long-term repair costs by up to 40%. Prioritizing drainage solutions and structural integrity is critical to mitigating risks and maintaining safety.