15 mm fiberboard withstand bathroom furniture ?

[legul]

Hello
Craftsmen have remodeled my bathroom but forgot to mark where the studs are.
So my question is if you can mount bathroom furniture on a tiled wall with plasterboard behind it and then a 15 mm wood fiberboard, or if you have to find the studs.
What needs to be mounted is a Miller tall cabinet, Miller mirror cabinet, and Miller vanity unit.

 

[Stensson11]

Hello
Craftsmen have remodeled my bathroom but forgot to mark where the studs were.
So my question is whether you can mount bathroom furniture on a tiled wall with gypsum behind and then a 15 mm fiberboard, or if you have to find the studs.
What needs to be mounted is a Miller tall cabinet, Miller mirror cabinet, and Miller vanity.

It holds. That's how you do it nowadays. 15mm plywood behind.

 

[Patrik Lidstedt]

15mm plywood is bombproof, it is also possible to hang cabinets in 11mm OSB.

 

[legul]

Thank you, then I can sleep calmly and set everything up tomorrow.