Drywall absorbs moisture like a sponge. And just like a sponge, drywall is harder when it’s dry than when it is when it’s wet. In fact, when drywall is saturated, you can push into it. And if your drywall is damp, or mushy, it’s a clear indicator that you have a water leak. Diagnosing these leaks can be challenging so it’s important to contact a plumber who has the latest state of the art electronic leak detection equipment to perform your leak detection service.