Should I ply first as I am told that adheshion is not very good on fibreboard and will eventually come unstuck no matter what admix is used.
Please help
I would love to help but i'm not 100% sure the best thing to suggest !
but someone will be able to answer you later, so hold in there til then.
HELP is on its way!🙂
Depends on the fibreboard methinks. If you are talking about MDF, then Ardex reckon their stuff can do it (7001). Would probably board over it myself, don't know if I would be comfortable not doing so.
Simple answer is NO!!!... it will eventually swell with moisture seeping through the grout and the moisture from the adhseive....use either marine ply or cement backerboards....dave...