Anhydrite sceed

[Nibbles75]

Im after some advice on tiling onto an Anhydrite screed. Does it need sanding prior to priming and if so what type sander and method do i use? there is about 75m2 in a new build.

 

[DHTiling]

HI and welcome..

What make of anhydrite screed is it..?

 

[Ajax123]

No one else seems to be joining in this one so here goes

Sand it to clean it and remove any loose friable stuff (dirt, snots, etc) Use 60grit paper and on that size I would use rotary floor scarrifier - take maybe a couple of hours tops.

Vaccuum it to remove any remaining dust (do this thoroughly)

Make sure it's dry and make sure any underfloor heating has been comissioned and run.

Prime it with suitable primer leaving sufficient time for the primer to dry prior to doing the next bit.

Consider uncoupling membrane if heated screed (not absolute necessity but useful protection against expansion/contraction)

Stick your tiles down using a suitable adhesive.

 

[Nibbles75]

Thanks Ajax for advice.. I didnt realise Lafarge was local to me so ended up going down to see them . There advice was similar to yours ..Cheers!!

 

[Ajax123]

Thanks Ajax for advice.. I didnt realise Lafarge was local to me so ended up going down to see them . There advice was similar to yours ..Cheers!!

similar.......SIMILAR...it should be the same not flippin similar.......where in the country are you?

 

[doug boardley]

similar.......SIMILAR...it should be the same not flippin similar.......where in the country are you?

ha ha , thought that myself Alan!
Nibbles, how long has your screed been down? and if tiling it have you included appropriate expansion/movement joints?