HI, does it not scale up when you click on the image??
By the time you buy the tanking kit you may as well use Aquapanel.
It's normal plasterboard. If that gets wet, it disintegrates.
I wouldn't fit it around a shower area.
However plenty of people do, and in many cases it lasts for years with no problems at all. If tanked/sealed, then it is highly likely there won't be any problems.
Whether it is 'wrong' or not really depends on what was originally specified for the job.
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