Water leakage from the car roof can be caused by several factors, including sunroof leakage, failure of the car's waterproof adhesive, and clogged drainage pipes leading to interior water leakage. Sunroof Leakage: There are generally two scenarios for sunroof leakage: first, small sand particles or dust clogging the sunroof drainage channel; second, the sunroof sealing strip being displaced or "lifted." Therefore, it is advisable to regularly clean the sunroof to maintain the cleanliness of the drainage channel. Additionally, during routine car washes, use high-pressure air blasting equipment aimed at the drainage pipe to remove dirt buildup inside the pipe. Failure of Car Waterproof Adhesive Leading to Leakage: Leakage often occurs around the doors or trunk openings, primarily due to deteriorated, aged, or cracked rubber waterproof strips. Rainwater can seep in through these gaps. Reapplying waterproof strip adhesive can effectively prevent leakage. If water enters around the door edges, the issue is likely with the surrounding waterproof strips—check for any breaks or peeling. The waterproof strips around doors can easily shift, so if water enters the cabin, inspect the door waterproof strips first. Clogged Drainage Pipes Causing Interior Leakage: The most common cause of interior leakage is clogged drainage pipes beneath the windshield. Infrequent car washes or prolonged parking under trees can lead to debris like dust, leaves, and mud being washed into the drainage pipes by rainwater, eventually causing blockages. This obstructs proper drainage, leading to water backflow into the cabin during heavy rain. Regular pipe cleaning and inspection of damaged components are essential to prevent this.
