I would like to know just where I should start on this conversion. Have wonderful looking tile in the shower from floor to ceiling except on the entry. Want to know how to ensure the existing walls - tiled will be secure with the water from a soaking tub. Then how to go about the entry to be built and tiled to make a tub. I believe I have extra tile that was used in this shower. What is the best method for determining what is behind the tiles on the walls and about the floor! I so love my bath time but cash is tight right now. Please advise!

Sorry, you can turn existing shower into hot tub without extensive demo and water proofing.