Wetroom, Anhydite, Ditra, Mosaic

[Old Mod]

As in smaller than 50mm?

Yes sorry.
The point loading of tiles smaller than 50x50mm is too high, resulting in the mats with similar profiles as Ditra to collapse.

 

[Just Rizzle]

what type of wet room tray are yer using

 

[Just Rizzle]

I would cover the whole floor including the tray with the ditra matting then tank the walls using kerdi membrain over lapping onto the ditra then if you want to tile straight away use tile masters 30 leveller and skim over the floor make sure you still have the slopes in the shower area. you should be able to have a guick sandwich and then your ready to tile I would use tilemasters anafix for fixing the matting and tilemasters ultimats for fixing the wall membrain and the tiles job done in a day? don't forget to cover the ditra joins with kerdi 100mm jointing

 

[Old Mod]

If ur waterproofing the floor with Ditra u must use 125mm Kerdi Band and use Kerdi Coll to stick it down, that will give u a waterproof seal. Tile adhesive is not good enough. If u haven't used Kerdi Coll before, be aware it sets in no time, it's super rapid!

 

[Just Rizzle]

If ur waterproofing the floor with Ditra u must use 125mm Kerdi Band and use Kerdi Coll to stick it down, that will give u a waterproof seal. Tile adhesive is not good enough. If u haven't used Kerdi Coll before, be aware it sets in no time, it's super rapid!

used it last week in wet room off in10 mins came part of shluters tanking and wet room kit best tanking kit by far

 

[Old Mod]

used it last week in wet room off in10 mins came part of shluters tanking and wet room kit best tanking kit by far

Yeah good gear without a doubt!
Does that come with the small Kerdi Coll or the larger 4.25kg?

 

[kaharrison9]

First of all apologies for not been around to offer further input as its been my daughters 9 year old birthday party and I've have had 25 toddlers to deal with.

Initially I was heading towards filling, curing then laying but I am swaying towards maybe the opposite now of filling the cavities and laying in one go as I know there should not be any weakness from the dovetail filling to the contact of the back of the mosaic.

One point of interest is I've just been looking at an off cut of Ditra and when a 50mm mosaic is put on top there will probably be only about 50% true contact of adhesive due to the amount of plastic around the cavities.

I will give Ditra a ring tomorrow and see what there take on filling the cavities first is. I personally still think it wouldn't be an issue in a uncoupling sense but probably more concerned with using a 6mm trowel giving a fine bed of adhesive and only with 50% coverage on a heated screed may be asking to much of the bond.


One other possibility is if there are any other uncoupling membranes which are flat and 100% waterproof.

Cheers for all your thoughts up to know.

Kevin

 

[Dave]

Seen as you are only after the waterproofing and not the uncoupling , check with schluter on the use of kerdi membrane or Dural WP is another choice.

 

[kaharrison9]

Seen as you are only after the waterproofing and not the uncoupling , check with schluter on the use of kerdi membrane or Dural WP is another choice.

Seen as you are only after the waterproofing and not the uncoupling , check with schluter on the use of kerdi membrane or Dural WP is another choice.

 

[kaharrison9]

It is a heated screed as well so Ditra ticked all boxes the for uncoupling and waterproofing.
Little bit more thinking required.
I've heard Benfer Schonberg have some type of waterproof and uncouple membrane which Im waiting for a call back on.

 

[Thespanishtiler]

It is a heated screed as well so Ditra ticked all boxes the for uncoupling and waterproofing.
Little bit more thinking required.
I've heard Benfer Schonberg have some type of waterproof and uncouple membrane which Im waiting for a call back on.

 

[Thespanishtiler]

ain't you finished them wet rooms yet kev ?

 

[Spud]

I dont like the sound of anhydrite and wet room in the same sentence, can you get the screeders to put a sand and cement screed in the bathrooms with an overall fall towards the drain ?

 

[Thespanishtiler]

I have done a few Gary. they where all anhydrite over wet ufh over timber floors.
I just shuttered off the area for the former before the screed was poured, laid ditra to the shuttering then set the former to the level of the ditra. tape up as per and good to go.

 

[Dave]

I have done a few Gary. they where all anhydrite over wet ufh over timber floors.
I just shuttered off the area for the former before the screed was poured, laid ditra to the shuttering then set the former to the level of the ditra. tape up as per and good to go.

I agree , as long as it's tanked , it doesn't matter what's under the Ditra...