tiling onto two different woods

**nelson** · 13-04-2010

Hi all, i need to quote on a job in a flat tomorrow, which is to tile one bathroom floor which has new marine grade ply screwed down and one kitchen floor which has chipboard down.the plywood is straight forward enough.I can go straight on with flexible addy ( do i need to prime first?)
regarding the chipboard, the lady said it was tiled before but it was 'uneven' and these have been taken up (she has bought the new tiles,porcelain i think). i've read all the threads on here about chipboard so i know the score with what i should do,but my question is, if it had tiles on before and as long as she tells me there was no issue with cracking of any sort, and it seems sound enough,can i go straight back on to it with new tiles ? or should i make all the usual recommendations to her, like new ply or using 6mm backer board? thanks for your help so far with the forums, its the best advice site on line by far...

**mikethetile** · 13-04-2010

I would overboard anyway

I take it the old tiles are already up

**david campbell** · 13-04-2010

i would rip up the chipboard add extra noggins and replace with a thicker ply or overboard with cement boards if there is no movement

**Diamond Pool Finishers** · 13-04-2010

as above

**nelson** · 13-04-2010

thanks everyone, i'll see it myself tomorrow and tell her this and see what she says.then I guess i've covered myself in case something happens...oh what about the new marine ply.Do i need to prime or can I just go straight on with adhesive?

**mikethetile** · 13-04-2010

Originally Posted by nelson

thanks everyone, i'll see it myself tomorrow and tell her this and see what she says.then I guess i've covered myself in case something happens...oh what about the new marine ply.Do i need to prime or can I just go straight on with adhesive?

depends on the adhesive, some recccomend priming some dont