Shower floor
When you step into our shower you can feel the floor flex. Do you think it would hurt to spray some expanding foam in there to take up the flex?
Forum Discussion
I used it in combination with some wood blocks. Use the low expansion type since you're after support not air gap filling. You don't need to fill every inch of the space under the pan, but do need to fill it in such a way that it provides a large surface of foam to fill the flexible areas.
