Porcelain tiles on top of 90 day old screed

[Bazzer39]

Hi
After some advice, I am a DIY tiler and going to be tiling our kitchen extension floor with porcelain tiles ( have tiled before so confident with tiling).
We had the screed laid (sand/cement @ 75mm) about 90 days ago, I’m confident it dried and has no cracking anywhere and level. The screed is on top of block and beam, dpm and 150mm jablite insulation, no UFH.
My question is will I be ok just to prime the floor with Bal primer after it’s been cleaned up etc and use a flex adhesive? Or do I need to use a Ditra matting etc before?

 

[Dave]

Hi.
what size area is it. ?

 

[Bazzer39]

Hi.
what size area is it. ?

26m2 the area to be tiled

 

[Dave]

26m2 the area to be tiled

My preference is to crack mat as a screed can crack at anytime tbh. Better safe than sorry with a new screed but it’s not essential.