I'd already be worried if you're fixing large format to walls that flex!
Their primary function is not to force down corners that 'pop up!'
Careful, glass houses and all!
But that's the problem!
This is nothing personal
@AD Ceramics,
But u've just about nailed most of the reasons and myths as to why using levelling straps is frowned upon! Haha
They're an aid to help keep pieces in place whilst the adhesive cures.
They're certainly not supposed to be used to force tiles down so much so that it puts undue stress on, not only the adhesive, but the tile too!
If you're using them to prevent a corner 'popping up' that gives cynics the argument they need to suggest they create voids below the tiling!
I make no secret that I use them when I feel it's necessary, and I think they can be a valuable aid.
Not everybody gets on with them, or even certain systems, and I'll reiterate,
The last person that should use them is a DIY'er, if they are to be used in the way that they are intended!
They take a fair bit of practise to use too!
I'm not here to promote their use, not at all, after more than 30yrs in the job I'm kind of aware we all have our ways of achieving the finish we want!
I just don't like being called a DIY'er! Haha
Isn't that right
@Simon benn Leeds