Metal Stud Wall in Tanked Basement

[LJD1974]

Hi,
Contractors are completing my basement and tanking it all (Delta Membrane). I am installing metal stud walls to the edges of the room that will be insulated but only plasterboarded on the one side, so I am concerned about the strength/possible felixibility of the wall as it will be approx 2.7m high with 12.5mm plasterboard. Some walls will have 50mm metal C studs and others 70mm. Will the studs need to be fixed to the wall (with proper tanking fixings) at a point around the middle to stop them bowing in/out, or will they be strong enough on their own? I want to avoid any fixings into the tanking if possible (for obvious reasons).
Thanks

 

[freddiemercurystwin]

No they only need to fixed top and bottom but check your chosen studs are suitable for the height.

I've done insulated plasterboard straight onto the membrane in similar situations but the walls were pretty straight. Obviously all the fixings were the proper ones.