Finishing stages of self build.... Question on anti crack options and Adhesive

Hi Guys, first of all thanks for the wealth of info on here.

I have tried searching to find answers of which I found some but not conclusive

As the Tile suggests , just in final stages of completing my self build forever home and have a few questions on the tiling of the downstairs

Currently have 150m2 of underfloor heated cement based screed throughout the ground floor

As I sprayed the walls and ceiling and other dust etc going to clean screed as best can and prime the floor with an acrylic primer.

Tiles chosen are Porcelain wood effect planks 150mm x 600 x 10mm

So questions if you would be so kind .....

Pretty set on using a Anti crack / Decoupling membrane which most likley to be Durabase but have had the much more cost effective Idrobuild thrown in the mix but can not seem to find much information or comparisons on them. Any preference here?


Secondly the minefield of adhesives ...
I am looking at Mapei Keraquick with the Latex Plus. This is the recommended adhesive by the UFH manufacturer but thats as far as it goes... Is there anything that would be recommended / suggest other than this ?


Thirdly... Adhesive thicknesses between layers
Using a durabase it is recommended using a 4x4 notched so assuming this will give roughly a 2mm layer of adhesive
Thickness of layer for tile above Durabase? I was planning on using a 12mm notched and skimming the back of tile but is this correct with this format of tile and ontop the Durabase?

I need to check my calculations as I have it using much more adhesive than one supplier is quoting ... so would really appreciate any advise on the above so can check.

Also sorry .. would you recommend a 3mm grout gap for the above ?


Many thanks, realise thats alot there but once sat down and got carried away ...

 

Craig,
A couple of things for starters
How long has the screed been down and is it a pumped screed ? The underfloor heating must be commissioned before you can do any tiling.

With regards to crack mat, I haven’t heard of that brand, but I would suggest you look at Tilemaster antifracture Mat. Very thin less than 1mm vs about 6mm for dural Mat, and will use much less adhesive.
I would look at using slow set adhesive on that area and save your self any additional stresses!

 

Thanks local,

Had a very quick look as the Tilemaster it looks a similar product to the Idrobuild one. Are these thin anti fractures as good as the Durabase for function and longevity ?

Screed is LoPro from NuHeat (Mapei rebranded) cement based UFH screed poured myself. Been down since February and has been run and commissioned last few weeks.

Yeah I think thats good advise on slower set. To be honest was just following recommended UFH guidelines but obviously many adhesives will do the same.. Any recommendations of adhesive and thickness for these tiles would be welcomed

Thanks again

 

Idrobuild tex is very good and cheaper than durabase. Easier to use too.

Kerakoll Idrobuild Tex Anti Fracture Crack Mat Full Roll | Decoupling Membrane | Fixing Materials | Tilers World - https://www.tilers-world.com/a~tw-1029-kerakoll-idrobuild-tex-50-metre-roll.html

I get mine from the link above. Also get a pallet deal of tilemaster adhesive from them too if you want.

 

Not sure what price Tilemaster comes in at for the mat but that Kerakoll Mat looks to be a great price.

 

The pallet deals are great prices

 

Here is the idrobuild mat in action this week

 

Didnt @antonio say that this mat wasnt available in italy as it didnt pass euro test standards . Please correct me if I am wrong

 

yes, but it's ok for standard bs.
I only reported what they told me the kerakoll local agent.
in the UNI standards nothing is written for antifratture mats.
it is written only; we recommend using them for large formats.

 

Thanks guys..

Ok so in your honest opinion is the Idrobuild etc as good as the Durabase / Ditra type mats ?

Were planning on living here for good so although budget is key I dont mind if its worth the extra

Also if using anti Fracture what thickness should I be allowing for in adhesive above the mat for 150x600x10mm porcelain?

Is it worth going to a S2? or would the Tilemaster Setaflex S1 be a good route to go down ?

Thanks again

 

I am using seatflex s1 on my job with limestone

 

you Don’t need s2 for this job and I fact you shouldn’t use s2 with ditra or dural. Those two cavity mats will allow for more movement than a thin crack mat. A 12mm trowel will give you around 3 mm bed thickness with that tile size.