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  4. How do I fix convertible roof leaks?

How do I fix convertible roof leaks?

Quick answer: Diagnose first — the fabric rarely leaks. Most cabriolet leaks come from seals, gaskets, drains, door membranes or rear vents/lights. Prove the source with testing, then replace perished rubbers (a conditioner can help, but replacement is best). After repairs, fully decontaminate and dry the interior to avoid mould and electrical issues.

Before you can fix a leak, first you have to find it. 

Many people who find water in their convertible car assume the fabric roof is leaking. This is hardly ever the case. Cabriolets are prone to leaking because of all the extra rubbers and seals that they have above a normal car, and this is often the cause.

However, it is worth noting that all cars can develop leaks when they get to about 8-10 years old, and as people tend to keep convertibles a long time, they are prone to all the same leaks any other car would have. A lot of people bring convertible Mini Coopers to us, assuming their problem is the roof, when it's the door membranes, the rear vents and perished seals around the rear lights that are the cause of the leak.

So before you do anything hasty, ensure you have found the actual cause of the leaks. This requires a bit of detective work to trace the source. Once you have found the leak, it is usually the case that replacement parts are required. The most common cause of leaks on all cars are rubber and neoprene seals and gaskets which have aged, split, shrunk or perished.  Although they can sometimes be revived with a rubber conditioner, often it is best to replace them. 

Once you have found and fixed your leaks, it is very important to dry your car, as water left in a car can cause a whole host of problems. You would be surprised how much water is in a leaky car, so don't underestimate this.

Written by . Last updated 09/09/2025 14:02