Mom got more mulch for the backyard. I have already hauled away those on the driveway, about 1/3. Today before playing Mahjon with Mom’s friends by draft (I guess one short of two tables), I installed the moisture-resistance plastic sheets on the wall without any penetration, even for the nails. It will prevent an unlikely situation that water in the shower place with two faucets going into the electrical stuffs inside the wall. The sheet is about 8 feet high, higher than the water lines. Should be okay.