Following on from my last post Thoughts appreciated, i think I am ready to start tiling and just wanted to check a few things.....

I have replaced the floor boards with 18 ply with edges and back SBR'd, there is no vertical displacement that I can see. My tiles are 600x600 porcelain on top of ditra. The floor has wet UFH.

I was wondering if i need to add latex to the kerraquick in this situation....

As for the walls I have followed recommendations here and will put new plasterboard everywhere tanked with kerdi near the floor and fully near shower/bath. Am I ok to fix the kerdi without priming the plasterboard?

Thanks
Again.

IF the Kerraquick is flexible you shouldnt need a second source of polymers to make it flexi. If it isnt flexible already, I would take it back and get some premixed bags so all you do is add water.
I take it the floor is solid enough so you havnt considered a two part flexible?

Kerdi should come with fitting instructions, if not consult your supplier or if still in doubt prime. Not PVA though

Originally Posted by davy_G

IF the Kerraquick is flexible you shouldnt need a second source of polymers to make it flexi. If it isnt flexible already, I would take it back and get some premixed bags so all you do is add water.
I take it the floor is solid enough so you havnt considered a two part flexible?

Kerdi should come with fitting instructions, if not consult your supplier or if still in doubt prime. Not PVA though

Kerraquick is classed as an S1 adhesive straight out of the bag Davy. You can add latex Plus to up that to an S2 adhesive and that product is specially designed for the Kerraquick.

Moved to tileadhesive/prep forum.

Ultrarapid-setting flexible (S1) cement based powder adhesive for ceramic tiles (thicknesses of adhesive up to 7 mm).
Applications:
Interior and exterior bonding of all types of ceramic floor and wall tiles (double fired tiles, single fired, porcelain tiles etc) on:
– old floors and walls (ceramic tiles, natural stone, terrazzo, concrete) provided they are solid and clean;
– cast concrete, properly cured prefabricated concrete panels (at least 4 months old), heating panels, reinforced cement panels, plaster boards, provided they are firmly fixed. Particularly suitable for works where rapid repairs are required spacing. N.B.: mixing with Latex Plus
(6 kg of Latex Plus for each 20 kg bag of Keraquick) provides increased deformability (S2), without changing the other positive features of Keraquick

Fantastic product..