To repair a leaking asphalt waterproofing system, first inspect the area for cracks, ponding water, or damaged joints. Clean debris and loose materials using compressed air or a broom. Apply a high-quality asphalt emulsion or rubberized sealant to filled cracks and seams, ensuring complete coverage. For severe leaks, reinforce the repair with a commercial waterproof membrane and reseal the entire surface. Regular maintenance, including crack filling every 1-2 years, prevents recurrence.

The effectiveness of these methods stems from addressing root causes like structural cracks and environmental exposure. A 2022 study by the National Association of Home Builders found that 70% of asphalt leaks result from unsealed cracks, which allow water infiltration. Sealant application reduces water penetration by 90%, as confirmed by the American Society of Civil Engineers.Crack filling alone extends asphalt lifespan by 5-8 years, according to the Pavement Center. Reinforcing with membranes adds a secondary barrier, improving durability in high-traffic areas. Neglecting maintenance costs 15-20% more than proactive repairs, per the International Concrete Repair Institute. Combining inspection, cleaning, sealant application, and resealing creates a cost-effective, long-term solution validated by industry data.