My daughter has just moved into a brand new house,it has provision for an en suite,but as money was tight they opted for it not being fitted but all services are there to fit at a later date. They do miss the shower though as the bathroom has none fitted, i have bought them a decent set of thermostaic bath shower taps to swap over,and showere curtain rail. No problem for me in fitting them,but as i live some 300 miles away i have asked them to get the bath area tiled before i come and fit the taps ect. i am old school when it comes to showers over fiberglass baths and allways fitted the edge seal around the bath before tiling,the one you tile over,as being a plumber i can recall going to many jobs with people complaining of water leaks only to find it being the bath having no seal around the edge and in 99% of cases they used a shower. I am paying for the tiling,but the chap who is going to tile it says no one uses hose edge seals any more and silicone does instead, i am not keen on this at all. I retired from plumbing some 10 years back and am now a school caretaker and very much out of touch with modern building / plumbing methods. Would you still use a tile sealing strip around before tiling,i worry as i know there is a fair bit of movment with fiberglass baths and would hate it all to leak.