Levelling slight bows in marmox

[sh]

Do you think the best option would be to start tiling ,possibly back buttering to take up the small bow, and see how they go on the wall ? (rather than the filling / damping option)
I would consider myself to be a very competent 'DIYer'

 

[Richard C]

Even so, unless your experienced you will probably have more trouble levelling back buttered tiles than getting the tile base flat before you start. I have the experience but prefer to level out/fill where necessary with an adhesive skim. It’s quicker for me to go over the low areas & get on with tiling somewhere else while waiting for it to set, it makes the tiling much easier & quicker.

It doesn’t have to be perfectly smooth just flat & level; use an aluminium spirit level or straight edge as a gauge rather than timber which will absorb moisture from the addy.

 

[sh]

This job seems to go from bad to worse, I have just cut the marmox to set the lipped shower tray into the wall and the dots of adhesive behind seem to come away very easily !!
I spent all day yesterday putting the Marmox fixings throughout the whole room (9 per board) but based on my findings with the adhesive should I double up on the fixings, just to make sure, or is 9 really enough ?
The tiles and addy weigh approx 32kgs per sq m.

Added : I have now put another 6 fixings on each board, hopefully that will keep it well & truly on the wall !!
Richard C : Which of the BAL range of adhesives would you recommend ?

 

[Richard C]

This job seems to go from bad to worse, I have just cut the marmox to set the lipped shower tray into the wall and the dots of adhesive behind seem to come away very easily I have now put another 6 fixings on each board, hopefully that will keep it well & truly on the wall !!

What adhesive did you use? If it’s failing I'd make sure you’ve got plenty of fixings in there to hold it all up. I mostly use Aquapanel & always fix through the adhesive dabs to avoid cracking the boards; fixings around a 250mm x 250mm grid.

Richard C : Which of the BAL range of adhesives would you recommend ?

I usually use Rapidset flexible; http://www.bal-adhesives.co.uk/products/rapidset-flexible
But if you want longer pot life then you can use SPF; http://www.bal-adhesives.co.uk/products/single-part-flexible

 

[sh]

I now have 15 fixings per 1250 x 600 board and yes they are through the dots under the board to avoid cracking.
i think that should be enough to hold the weight.