Laying Quarry tiles in kitchen

[macc365]

I'm after some advice and direction from those in the know, as to the best way of prepping a agilia screeded floor for laying 2" quarry tiles.

I actually spoke to agilia they recommend sanding the floor to remove waxy curing agent (which i have done), score the floor (sounds extreme) and paint 2 x coats of epoxy primer. Lay tiles with a flexible tile adhesive. Sounds perfectly reasonable. Can anyone recommend a suitable epoxy primer?

I was also advised by a, another that SBR bond painted to the screed would provide adequate adhesion and use a 3:1 sharp sand mix for tiles to bed on! Old school i guess!

I've read some threads that mortar isn't really used by professional tilers. Is this to do with it being outdated, labor intensive or generally a no no?

First instinct would be to go with manufacturers recommendation but i was wondering if anyone had a/ used either of the methods above, or b/ used an alternative practice with equally successful results?

Thanks in advance

Mark

 

[tpt]

agila is an anhydrite screed to the best of my knowledge. the issue is caused by the fact that its a gypsum based screen rather than a cement based one and as the adhesive is cement based they can react if not primed properly.

You dont mention if you have a pumped underfloor heating system - if you do the following advice changes to do shout!

if you dont have a UFH:

1)
You must ensure that the screed has had adequate time to cure, which will depend on the thickness. The screed must contain <0.5% residual moisture before any tiling can take place.
Any surface laitance must then be removed (sounds like you have done this bit) and treat with 2 neat coats of acrylic primer
2)
Use a single part flexible adhesive such as granfix fastset flexible or granfix rapidset flexible (my preference as its a true s1 addy)
3) use a flexible grout.

OR you can use a gypsum based addy like this

http://www.tileadhesive.co.uk/csa.html

but this is quite new.

if you have UFH you need an s2 addy - let me know.

 

[macc365]

Thanks TPT. The floor has been down 10 months now and at a depth of 100mm with no UFH present. Your comment about the anhydrite screed has got me thinking.

It was put through a pump flow system. There was surplus material that was dumped in the front garden for me to dispose of and it contained varied aggregate. Looking on the Agilia website i do believe this could be a cement based Agilia 10 screed product?

Would the preparation differ on the primer aspect?

 

[tpt]

just had a search. if it is agila 10 then yes that looks to be a cement based one, which does bring into question the suggestion to use epoxy??

heres the datasheet on it. http://www.lafarge.co.uk/AandCReadymix/Agilia Screed 10 Datasheet.pdf

if you were a customer standing at my counter i'd call granfix's technical line to see what they said, might be your best bet. Bal have a similar facility.
http://www.tileadhesive.co.uk/index.html

i dont want this to seem like a fob off, but it will mean you have a fully backed up specification.