What Causes Water Leakage from the Car Roof?

[McIsabel]

Water leakage from the roof can be caused by several reasons. Below are the details: 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 lifted or displaced. Therefore, it is advisable to regularly clean the sunroof to maintain the cleanliness around the drainage channel. Failed Car Waterproof Seal Causing Leakage: Leakage often occurs at the openings of doors or the trunk. The primary cause is usually the waterproof seal, which may be defective, aged, or cracked, allowing rainwater to seep in. Reapplying a sealant specifically designed for waterproof seals can completely prevent leakage. Clogged Drain Pipe Leading to Interior Leakage: The most common cause of interior leakage is a blocked drainage pipe under the front windshield. Infrequent car washes or prolonged parking under trees can lead to the accumulation of dust, leaves, mud, and other debris being washed into the drainage pipe by rainwater. Over time, this can clog the pipe, hindering proper drainage. During heavy rain, water may backflow into the car, causing leakage.