A stud is required on both sides of the enclosure to securely install a shower door because it provides support for the system to operate smoothly day after day.
Most, although not all, shower doors require studs for proper installation. Installing into a stud helps ensure the door is firmly anchored, reducing the risk of movement, misalignment, or long-term damage.
Before purchasing, it’s important to check for stud locations and review your specific installation guide, as requirements can vary by model.