Building or renovating a commercial car wash means choosing materials that can withstand some of the harshest conditions. Car wash bays are subject to high-pressure water streams, chemical detergents, wax treatments, and varying humidity levels. While vinyl-covered drywall is the go-to wall material, using it inside a damp car wash is a recipe for rapid structural failure and costly repairs. Here is a closer look at why drywall falls short in car wash environments.