Skimmed walls

[joet]

Hi,

I want to tile my bathroom with some porcelain tiles with a weight of 21kg per m2. However the substrate is float and set that has been skimmed again. I have scraped the last layer of plaster off on one wall and it was coming off to easy. However on another wall it's pretty hard to take off but it will come off. Am I worrying too much?

 

[Time's Ran Out]

Better to worry now than when they fall in the bath!

 

[joet]

The original float and set has been skimmed twice by looks of things so have scraped down to original skim and this of course has a layer of pva on it. When I sbr primed it it started peeling so peeled one wall off. The other wall dried and then both sbr and pva was solid, should I still remove the pva?

going to do a test tile to make sure anyway. I know lots of people still tile over pva...

 

[One Day]

...and lots of people still drive whilst texting.

 

[White Room]

The original float and set has been skimmed twice by looks of things so have scraped down to original skim and this of course has a layer of pva on it. When I sbr primed it it started peeling so peeled one wall off. The other wall dried and then both sbr and pva was solid, should I still remove the pva?

going to do a test tile to make sure anyway. I know lots of people still tile over pva...

The moisture in the sbr has softened the pva, so remove the pva...