Had vinyl tiles removed from concrete floor which was fairly flat apart from one area where a pantry wall used to be. i'm inexperience so decided to get my plasterer to lay down some bal Acrybase. To my horror he used about fifteen percent extra powder. it has set solid and is very uneven with round ridges all over left by the troyel which i expected to settle. the troughs are as deep as five to eight mm in places. there is significant tile wobble. i don't know how i will get them to line up. is this lumpy finish normal or due to too much powder? the average depth is about three to four mm. it was done on friday so do i need to chisel it off urgently or is it maximum hardness already? is there a machine that can grind it down flat. what should i do? i still have a spare bag and one bottle.

It sounds as if the mix has been to stiff, too much powder, as you put it, what area ( m2 ) are you talking about ? Have you enough with the bag left over to fill in the troughs, a loose mix floated across the area should work, and what size tile do you have ?

Like you say sounds like the mix was too stiff and therfore not mixed properly.
Mix up more with plenty of the left over latex and smooth over the top of it all again. Might need more than one bag though depending on the area. Should come up with a nice finish.

I wouldnt chisel any off unless some lums are really proud and your next layer wont cover them.

Good luck and you will know next time to have a go yourself, sounds like you have a better eye then the plasterer! Hope his walls are smooth when you rub your hand over them??

The area is about 8 square m. the tiles are 30 by 30. i think i will try to scrape down the worst bits and level it again with the right mix. if that doesn't work will get it chiseled off. i'm just a bit worried about how hard it might be in a few days from now. has it already cured max or will it get harder? i don't want to damage the concrete underneath.

Slighitly off topic, i had the bathroom walls cement rendered because i want to put up porcelain tiles 9.5 mm thick which weigh 20Kg per m. the bricks were cleaned almost like new with no dust or plaster left behind. i was a little concerned that they did not bond or prime it but they did spray a little water on. they used sovereign render mix and sbr in the mix. the finish was perfectly flat. no top coat just some lines scored to help the tiles stick. hope that will be ok. everything about tiles is a lot more complex than most people realise so this forum is a great help.

you can tile 4 hours after laying it soft floor covering is 24 hours the guys are right the mix was very wrong give it a go youself to make it right if you follow the instructions about mixing its pretty easy to apply i did it the first time using it and worked spot on!

Originally Posted by bureaucrazy

Slighitly off topic, i had the bathroom walls cement rendered because i want to put up porcelain tiles 9.5 mm thick which weigh 20Kg per m. the bricks were cleaned almost like new with no dust or plaster left behind. i was a little concerned that they did not bond or prime it but they did spray a little water on. they used sovereign render mix and sbr in the mix. the finish was perfectly flat. no top coat just some lines scored to help the tiles stick. hope that will be ok. everything about tiles is a lot more complex than most people realise so this forum is a great help.

You say render mix, was it called renderlite or was it an actual sand and cement with sbr

It was washed plastering sand which i think is mostly sharp sand with cement and mixed in a drum cement mixer with sovereign rendermix liquid waterproofing additive and also liquid sbr mixed in.