Hi all, I have a burning question, do you need to re-do the whole common toilet floor and wall tiles, waterproofing etc when changing the toilet entrance? I had enquired to seal up the existing entrance and hack open a new entrance and was told by a certain ID that I need to re-do my entire common toilet floor and wall tiles and toilet reno. My toilet is still very new as its hardly used so I am very surprised this was suggested by the ID. He said this is to prevent a leaking possibility in the future. I am in need of advice if this is required or am I being chopped as all I want to do is have a new entrance for the door, an opening above the door for ventilation and have a mortar base at the new entrance. He is currently quoting me $8,800 to hack, supply wall/floor tiles, haulage of debris, protection sheet, waterproofing, new door, new stainless steel pipes, build hollow wall to seal current entrance. Price doesn't include the mortar base, boxing up of pipes and include an opening above door for ventilation which I think he forgot to add in. Help please, thanks! Cheers