Floor screed drying time - advice please

[devonmark]

i'm sure there is an adhesive for green concrete (not fully cured), i don't know if they do it in flexi though.

 

[DHTiling]

Ditra is spot on for this type of installation... here is the latest 2007 handbook for ditra installation.....

http://www.tilersforums.com/tiling-forum/5551-2007-schluter-ditra-installation-handbook.html


Also as mentioned you could use a green screed adhesive.....
BAL Green Screed Adhesive

A grey, highly flexible, water and frost-resistant tile adhesive suitable for fixing all types of ceramic floor tiles, including porcelain, ceramic mosaics, terrazzo, natural stone (excluding marble) in interior and exterior locations. It also provides enhanced adhesion to low porosity substrates. Suitable for situations where fast track installation is required, i.e. recently laid screeds or concrete. Suitable for use in showers and swimming pools.

 

[mick7]

Ditra - I'm ready to go.

What a fantastic forum - thanks all for the great advice.

I've just ordered the ditra, and will use the adhesive recomended to stick the ditra to the new screed.

I'm only an amatuer I'm afraid, not an expert like you guys and this will be my first time laying a porcelain tile floor. Its just under 4.5 metres square on new screed ( level I hope) . Clear room, only one small post to cut around.
I've watched the ditra video - pretty helpful for an amateur like me and I'm ready to go.
So I'll trowel on the adhesive to stick the ditra ( do you think I need their branded tape to tape the ditra joints or can anyone recommend a cheaper one?) to the new screed and then trowel on the adhesive to lay the porcelain tiles on. What adhesive ( flexible??) do you guys recommend here for 60 x 60 porcelain tiles?
I'll seal the tiles first with Lithofin impregnator before I lay and then again after I grout. Is there a problem with the adhesive which appears dark in colour staining the tiles?
Someone recommended a porcelain tile cutter for about £60 from Boydens in Croyden, that sounds pretty good?

If this little 5 sq metre project goes ok, I might try the slightly more daunting 45 sq metre.

Any more advice before I start more than welcome.

 

[DHTiling]

If the floor is not to be used as a wet floor then no need to tape the joints.....use a standard porcel bond adhesive...ditra don,t recommend flexi on top of it...under yes on top no.....check the manual i have linked too in the above post....

 

[GazTech]

Mick, take some before and after pictures for the tile gallery....no one has done that for us yet.....good luck and don't stop asking questions if you are unsure of owt.....Gaz

 

[mick7]

hi
what non modified adhesive to you recommend for sticking the porcelaine tiles to Ditra. I've got Bal CTF 3 but just realised that its "modified" and Ditra recommends non modified. many thanks

 

[DHTiling]

There are many brands suitable for use on Ditra but if you want to use a BAL one then use bal goldstar.....

BAL Gold Star

A grey non-slip water/frost-resistant cemetitious adhesive for wall and floor applications with BAL Porcelbond Plus Technology allowing it to be used for fixing fully vitrified and porcelain tiles to a number of backgrounds/bases, such as concrete/brick/block walling, concrete bases, cement:sand rendering/screeds, plaster/plasterboard, mastic asphalt and backgrounds with a low porosity. Suitable for exterior and interior use. Extended workability time.

 

[mick7]

Many thanks for quick reply. Is'nt Gold Star a "modified" adhesive the same as Bal CTF3. I thought Schulter recommended non-modified ??? I'm only a novice at this?

 

[DHTiling]

What they mean by modified is a flexible adhesive....porcel-bond adhesives have only small amounts of polymers in so will be ok.....nearly all rapidsets etc are porcel-bond now....

 

[mick7]

Great, does that mean I can use the Bal CTF3 that I've already bought from Topps, it seems that it comes under the same heading as Bal Gold Star ??

Sorry to cross over to my other thread, but do you recommend I only use a third of a 20kg bag of green screed adhesive to get thin set coverage for my 5sq mts floor?

Should I use a 6mm round notched trowel instead of my 13mm round notched one??

Many thanks agin for your help