Best method to get plumb walls before boarding & tiling

[garmcqui]

I am putting up backing boards for tiling on a breeze block wall.

To ensure the bath fits well, I need the finished wall about 33mm forward of the blockwork. I understand this can be done by dot and dab (indeed the old plasterboard had 20mm dabs) but having never tried this I’m reluctant to ‘cut my teeth’ on it at such depths. So am planning to fix 22x48mm battens to the blockwork, then fix the 10mm backing boards to these.

My plan is to temporarily put the battens up with a good bead of pink grip / grip fill, tapping them plumb, then waiting 24h for the glue to go off (filling any gaps in the process). Then, once the glue is solid, fixing the boards with long screws and plugs, through the battens into the blockwork.

This sound feasible? Thanks

 

[TeaAndBiscuits]

When you say 'backing boards' - if you mean hardie backer or equivalent cement board, you cant dob and dab it directly to the wall anyway. Well, you can, but they wont stay there, you'd need to mechanically fix through the dabs as well.

Easiest way for battening in my experience is just use long hammer fixings and pack behind to get the battens plumb and in a line. Don't know how you'd hold the battens to the wall in the right place while the adhesive goes off without some mechanical fixings... but then you might as well just mechanical fix them from the outset.

 

[lostinthelight]

Fix/ pack a top and bottom rail or batten running with the bath which are upright to each other and fit the vertical battens between them packing under the fixings/spaces

 

[garmcqui]

When you say 'backing boards' - if you mean hardie backer or equivalent cement board, you cant dob and dab it directly to the wall anyway. Well, you can, but they wont stay there, you'd need to mechanically fix through the dabs as well.

Easiest way for battening in my experience is just use long hammer fixings and pack behind to get the battens plumb and in a line. Don't know how you'd hold the battens to the wall in the right place while the adhesive goes off without some mechanical fixings... but then you might as well just mechanical fix them from the outset.

Thanks. The boards are jackoboards, if that helps. But yes, whichever method I use I would be mechanically fixing the boards to the blocks, whether it’s through dabs of adhesive or through battens themselves.

If battening, the main role of the pink grip (or gripfill) would be to fill the gaps and (once set) keep the battens plumb when screwing into the wall.

But you think using shims to pack out behind the battens would be better?

 

[garmcqui]

Fix/ pack a top and bottom rail or batten running with the bath which are upright to each other and fit the vertical battens between them packing under the fixings/spaces

Thanks, can I ask what you mean by “running with the bath” plz?

 

[lostinthelight]

parallel to it and right angles to end wall if they aren't at the mo so its all nice and square.