Bathroom Flooring

[VinoTinto]

hi- I am converting a timber floor room into a combined bathroom/washing/drying room in Victoria (Queenscliff) If the wet bath area is tiled, can anyone advise what to use under the washing machine and dryer? They will be elevated on a platform 400mm and enclosed in the usual whiteboard carcasses, with a double-fold door in front. Can I just overlay the entire floor with AC (villaboard)-tile the bathroom and leave the area under the machines? The main concern is a water catastrophe in the washing machine area.
Thanks in advance
Vino

[echnidna]

I would put cement sheet down over trhe total floor including under the washing machine and dryer. Seal it after its down.

[flat_tyre]

Yep, sheet and seal the lot, if you are worried about water overflow you could always install a floor drain....