"Scott M" wrote

TheScullster wrote:

There seem to be various types on the market, some of which look well
waffey to me!

It's not the boxes that give out but the plasterboard. Most seem to have
the same size sideflaps so little to choose there in terms of load
spreading. To my mind they'd be better if they had extra flaps top and
bottom on the double boxes as they're nearly always going to be socket
boxes.

Having said that, I fitted a double socket in an existing plasterboard
wall the other day using one and was surprised at how solid it felt.

If it was me, I'd simply set a 35mm metal back box into the existing wall
so that it'll sit flush with (or slightly behind) the front face of the
plasterboard when it's fitted.

--
Scott


Thanks Scott

That was my first thought - I like metal boxes screwed to something solid!
But that would cause a cold bridge to the solid/cold/damp outside wall.

Phil