Your situation sounds similar to mine. All I can tell you is that your local jurisdiction may require a more stringent method @ any "flat" surface inside the shower area perimeter (such as a shower seat), also requiring that any possible water collected @ the flat surface be properly "communicated" to the shower pan area for proper drainage-out.
Best of luck with your moms project. (P.S. When I said flat surface I meant semi-flat since it is a good idea to have a slight pitch for water run off.)
Best of luck with your moms project. (P.S. When I said flat surface I meant semi-flat since it is a good idea to have a slight pitch for water run off.)
