R
Realstokebloke
Hi - have covered this on "my first job" thread but...i fear the floor aspect (potentially most serious) has got lost in amongst the wall disasters...and i'm still floundering.
I had previous tiles straight onto green chipboard with a tub flexi (no ply) no nothing infact & used an ordinary tubbed grout with a flexi additive. &, against all odds (i now know) it was solid & uncracked.
They were solid & a to get off in fact - the adh. was a little "spongy" is the best way to describe it - but it worked!
this time i bought (what i thought) to be a decent cement adhesive (but now, not so sure) Unibond Rapid set ultraflex & the best Mapei flexi coloured grout - forgot the exact name - (both as mixes) thinking i'd get a better result.
This time, i 'ply-wooded' it & did a 5:1 PVA seal over as per the bag instructions on the unibond.
But...two of my tiles popped straight off. i phoned unibond who told me the ply i used was too thin (6mm vs 15mm as per BS Regs) but...that should affect it too much & to be fair got me to send back a sample for testing (still at the lab) & gave me a credit for a new bag of same.
I cleaned it all off & them down again but the still move a little & so have to come up.
I also contacted mapei about the grout (cracking accordingly) & they scoffed at the 6mm & laughed at the use of PVA.
But, as per above, i really, really, don't want to take the floor up (the tray, toilet are in & down as above - & there would be a divorce) to start putting 15mm + down + more new tiles.
Any ideas?
Obviously, i'd scrape any PVA off & add more screws into the chip / joists below for added stability.
But,how 'far' back will i have to go?
Can i re-stick them with a better adhesive?
Can i add a dollop of flexi additive to the grout to help?
Also, where it's stuck, the grout has really 'stuck' - any best ideas for grout removal where it's cracking?
And any better grout instead? Mapei even said Silicon ?? : 0
I really, really don't want to have to strip out the tray & loo (sink not in yet) etc to start again on the floor if i can possibly help it...
I had previous tiles straight onto green chipboard with a tub flexi (no ply) no nothing infact & used an ordinary tubbed grout with a flexi additive. &, against all odds (i now know) it was solid & uncracked.
They were solid & a to get off in fact - the adh. was a little "spongy" is the best way to describe it - but it worked!
this time i bought (what i thought) to be a decent cement adhesive (but now, not so sure) Unibond Rapid set ultraflex & the best Mapei flexi coloured grout - forgot the exact name - (both as mixes) thinking i'd get a better result.
This time, i 'ply-wooded' it & did a 5:1 PVA seal over as per the bag instructions on the unibond.
But...two of my tiles popped straight off. i phoned unibond who told me the ply i used was too thin (6mm vs 15mm as per BS Regs) but...that should affect it too much & to be fair got me to send back a sample for testing (still at the lab) & gave me a credit for a new bag of same.
I cleaned it all off & them down again but the still move a little & so have to come up.
I also contacted mapei about the grout (cracking accordingly) & they scoffed at the 6mm & laughed at the use of PVA.
But, as per above, i really, really, don't want to take the floor up (the tray, toilet are in & down as above - & there would be a divorce) to start putting 15mm + down + more new tiles.
Any ideas?
Obviously, i'd scrape any PVA off & add more screws into the chip / joists below for added stability.
But,how 'far' back will i have to go?
Can i re-stick them with a better adhesive?
Can i add a dollop of flexi additive to the grout to help?
Also, where it's stuck, the grout has really 'stuck' - any best ideas for grout removal where it's cracking?
And any better grout instead? Mapei even said Silicon ?? : 0
I really, really don't want to have to strip out the tray & loo (sink not in yet) etc to start again on the floor if i can possibly help it...
