Can Anybody give me any good reasons why I should not use mortar to retile entire bathroom walls with large ceramic wall tiles (31cm * 41cm each tile)
The problem I have is the walls from top to bottom aren't exactly plumb/square, and to get the wall square means either replastering the wall square (and then waiting 1-2 months for it to dry - correct me if I'm wrong), OR making up the gap with the tile adhesive. Problem is the gap comes to a maximum of 1/2 inch. and all the ready mixed tile adhesives are 3mm max thin bed. I was going to build the bed up 3mm a time but it takes 2 days to dry out and I'd still be doing the job next Christmas. I sucessfully stuck a few tiles using unibond waterproof cement tile adhesive which to me seems to be a really good product - much better than the crappy unibond thin bed readymixed which I started off with then took down cos I didnt like the way it was setting (slight cracks in places)
I could continue using the cement adhesive but as it needs to go on pretty thick in places, and isnt particularly cheap, I am seriously considering using a mortar mix. It doesnt seem all that different to me. I was hoping somebody could warn me of any dangers before I start. I was thinking of using a mix of 1: 0.5 : 6 portland cement,lime, silver sand. Will I be able to tile on top straight away (probably 1 row at a time until it sets). Any worries about mortar drying out and shrinking / spoiling tile layout. Can it be applied as fairly substantial blobs rather than continuous as I will need some play to get the tiles even, square and vertical. Anything else?
Thanks for any advice
(I'd be interested to hear what John (Schmidt) and AerMAX think)