On 14/06/2021 23:13, Grumps wrote:

I think I'm going mad!
Am I correct in saying that a dry lining back box does not need to be
screwed to a stud or noggin? Screwing only applies if fitting a steel
box in this location.

Yup a dry lining box has a clamp attached to the screws that go through
the face plate, that pulls the box tight to the plasterboard (the lip on
the edge of the box, stops it being pulled through the hole in the wall).

The better boxes have a kind of ratchet action that keeps the clamp
locked in place even if you undo the screws later.

--
Cheers,

John.

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