Thanks so much for suggesting this product (Oatey PVC shower pan liner). I went out right away and found it in the shower section at Home Depot. They sell it by linear foot and also in a 5x7 foot roll. I bought the smaller roll for $35 for my Irish stepdancing daughter's room which has a wood floor. I still might get the TimeStep 5 later on but I wanted something very portable quickly. I'll share this info with other stepdance mums.