PVC is the most practical drywall alternative for garage walls when moisture resistance, easy cleaning, and low maintenance are priorities. Plywood offers good impact resistance and mounting strength, while FRP provides a durable, washable surface. The right choice depends on how you use the garage, how much moisture it encounters, and whether wall protection or heavy-duty mounting is the main concern. For most residential garages, workshops, and utility areas where moisture and routine maintenance matter, PVC wall panels offer a strong combination of durability, cleanability, and moisture resistance.