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Hello and congratulations for your site! Here I come to realize an extension of my back facade with kitchen, room and room of water. I plan to create a partition type Placostil between kitchen and new bathroom and doubling in10 + 80 for the new facade and plasterboard only on the old facade... my bathroom will include a walk-in shower ( on the ground) of 1mx1.20... my question is to know if I have on all the periphery of the walls of the room of water to integrate plates hydro or only in the level of the shower... All the room of water will be tiled...

One thing is certain: you need the hydro plate for the shower. But in a general way, I advise you to put in the whole of the bathroom, to avoid any risk of humidification.

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