HELP! Shower pan liner install–good or bad?
I’m having a new shower pan installed. Attached are pics. I’m concerned that from everything I’ve researched on how to do a rubber liner, sealing the corners is important, no nail penetrations on the inside or top of the curb, etc…The installer says he’s done hundreds this way and has never had one leak. But he’s only 29 years old and I’m concerned that in 10, 15 or 20 years it could leak and he’s likely not going to be around. The old lead liner lasted almost 65 years. Is it unreasonable to expect a rubber lined paan to last 40 years? And what is the typical cost to do a mortar shower pan? Please comment on the picturesattached. There are more pics in a separate post. THANKS!