Had to choose between a 1/4 inch and 3/8 inch spacer for a tricky shower door install in a 1920s house. Went with the 3/8. The wall was more out of plumb than I thought.

Honestly, going with the 3/8 inch spacer was probably the wrong call. You said the wall was more out of plumb than you thought. In a really old house, the bigger spacer can sometimes make the door look obviously shimmed and weird. A 1/4 inch gives you less room to hide the error, but it forces you to fix the real problem with the wall first. I mean, you might have just built a bigger flaw into the install to cover a smaller one. Now the whole frame might sit off the tile in a way that catches your eye forever.

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christopher_wilson5mo ago

Tbh, "catches your eye forever" from @olivia248 is giving me nightmares about my own bathroom now.

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lane.morgan6mo ago

Our 1925 bathroom door needed a full half-inch shim on one side.

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