Tile Adhesive dragging. - Tile Advice

[davidgodfrey]

Hi All,

I am tiling onto some wedi concrete foam boards and I am having issues spreading the grout. When spreading the grout quite often it will drag and leave gaps in places instead of going on smooth. It will often take several paces until I get a satisfactory result. If I re-do a pass it will often come off completely.

I am using a norcros fibre adhesive.

Any ideas where I am going wrong, I have tried several different mixes ranging from firm to quite wet, I have thoroughly cleaned the trowels both 6mm and 8mm have the same issues.

Has anyone ran into this before and how did you resolve?

Thanks for any help?

 

[Dumbo]

Personally I would prime the boards after making surgery are clean , I know it says priming not necessary , and if you still have problems use the flat edge of the trowel to spread a skim of adhesive on the board, pressing firmly, then put on more adhesive and use the notched side .

 

[Flintstone]

That is usually a characteristic of a cheap adhesive I find, not very sticky. Can't say as I have any experience of the one you are using

 

[Unused Account 1]

Never happened to me,never used the adhesive mentioned

 

[davidgodfrey]

What primer and adhesive would people recommend, this adhesive came highly recommended from a local trade tile warehouse.

 

[Dumbo]

I appear to go against what is conventional wisdom on this forum but I would use mapei primer g , and mix your adhesive a bit wetter as it could be it's to dry .