Water shoots out of the top of the tank when flushed! Please help! I've searched the trouble shooting notes on Sloan's site and elsewhere and haven't seen anything that applies.

Think about it. With the Wedi over the lip of the shower base the water can't go behind the wall. That is what they are saying. Only problem is if you want to change shower base. I am a woman and went to Wedi training. I did buy a solid surface shower base due to it lasting and not cracking. Only problem I do not understand is what do you do between the shower base and the floor board. If there is any play in the shower base which I am not installing but want to understand if it will be done correctly when I do get my bathroom done. If there is any play in the shower base which in my case is large then the catch 22 is between the shower base and the floor board. They say do not put the item you use between the wedi board in this area. If commode overflows this will be the loose link for having water into the floor and floor below. any advise there?