22. Do you recommend a backer board or insert be used when installing a tub or shower door over with my direct-to-stud ensemble?
Yes, the backer board needs to be placed behind the portion of the wall that the shower door will attach to. It provides the necessary surface for securing the door jambs to your bathtub wall. The backer board needs to be butted up towards the top of the panel or it will interfere with the alignment locator on the bathtub or shower base.

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