Fitting a Pocket Door Into a Riverside Hall Bathroom

A door that swings into a small room takes a quarter circle of floor with it, every time it opens. In a post-war hall bathroom in Riverside, CA, where the room is often five feet by eight, the running record riverside bathroom remodeling the institute for human ecology holds shows that swing eating the one clear spot beside the vanity. A pocket door slides into the wall instead, and that single change is often the first thing a bathroom remodel in these houses settles.

What the wall has to hold

A pocket needs a hollow stud bay about twice the door width, free of plumbing, wiring and bracing. Most hall walls in Riverside houses built after the war are plain two-by-four framing with plaster or drywall, and the hall side is usually clean. The bathroom side is the problem, because the wet wall with the tub valve and the vanity supply lines often shares the same cavity. If a supply line or a vent runs through the pocket, it has to be rerouted before a frame goes in.

Frame, track and the split studs

A pocket frame replaces the studs with a pair of split studs that stay straight under the weight of the finish. Cheap kits use thin metal studs that flex, and a bowed stud lets the door drag on drywall screws. A frame with a steel track bolted at the head carries the door on two hangers, and the track must be dead level, or the door drifts open on its own. Check this before the drywall closes the wall, because nothing about the hardware is reachable afterward.

Where moisture meets the opening

The pocket sits close to the shower, so the finish on the bathroom side matters. Cement board behind the tile and a waterproofing membrane keep steam from working into the open cavity. A pocket left hollow becomes a place where damp air collects, and the bottom plate of that stud bay is the first spot to go soft. Sealed edges around the casing slow that down. Caulk the casing joint where the wall meets the tile, not the door itself.

When a pocket door is the wrong answer

A load-bearing wall limits the options. In a hillside house below the Box Springs Mountains, a hall wall might carry roof loads through a header that cannot be notched. In that case a barn-style slider on the hall side, or an outswing door, does the same job with less structure disturbed. Walls with a main drain stack inside also rule out a pocket. The tell is a cast iron or large plastic pipe visible in the crawlspace or attic directly above the wall. A small inspection hole in the drywall settles it before anyone orders a frame.