To address balcony water leakage during rain, first move furniture and belongings inside to prevent damage. Check for visible cracks or gaps in the balcony tiles or flashing and seal them with waterproof caulk. Clear debris from gutters and downspouts to ensure proper drainage. If leaks persist, contact a licensed roofer or waterproofing specialist to inspect the balcony membrane or flashing for repairs. For temporary relief, use a tarp and weights to divert water away from the balcony structure.

Persistent balcony water leakage often stems from inadequate drainage systems or damaged waterproofing layers. According to a 2022 study by the National Association of Home Builders, 35% of residential water damage claims involve roofing or flashing issues, with gutters and downspouts being the primary culprits when clogged. A clogged downspout can cause water to pool and渗入 (enter) walls, leading to mold growth and structural decay. For example, a 2021 report by the Insurance Institute for Property Loss Reduction found that water damage from rain costs U.S. homeowners over $5 billion annually, with 40% of cases linked to poor drainage. Additionally, cracked balcony tiles or flashing—common in older buildings—allow water infiltration, which can weaken concrete foundations over time. Proactive maintenance, such as annual gutter cleaning and membrane inspections, reduces long-term repair costs by up to 60%, as noted by a 2023 Journal of Building Engineering study. Neglecting these steps risks costly renovations, including replacement of entire balcony slabs or structural supports.