600x900 limestone

[jstrats]

Have a job to price using 600x900x20mm (azul valverde flamed)

Conservatory interior and exterior around conservatory, screed which is flat as a pancake will be around 3-4 weeks old by the time i tile it, they also have UFH, which is the best way to go here? Was thinking Durabase, is Bal Green screed suitable for this type of tile.

Just seeing how others would go about it.

Thank you good people.

Jamie.

 

[Sean SML Tiling]

I think weber adhesive is suitable for green screed which would be alot cheaper for you. I personally would try use ditra but cost will come into it.

 

[J Sid]

I agree. Just finishing of a job, 180 m2 900x600x20 limestone on detra on wet heated screed using weber. Been doing that way for years, never had any problems

 

[The Legend; Phil Hobson RIP]

Have a job to price using 600x900x20mm (azul valverde flamed

Conservatory interior and exterior around conservatory, screed which is flat as a pancake will be around 3-4 weeks old by the time i tile it, they also have UFH, which is the best way to go here? Was thinking Durabase, is Bal Green screed suitable for this type of tile.

Just seeing how others would go about it.

Thank you good people.

Jamie.

How deep is the screed? 4 weeks is not enough time imo. Is the screed sand and cement? anhydrite?

 

[Stef]

I think weber adhesive is suitable for green screed which would be alot cheaper for you. I personally would try use ditra but cost will come into it.

Yeah you are right, you can use Weber but you need to modify it with AD250 first to go onto a green screed.

 

[Sean SML Tiling]

I wasn't 100% sure and I didnt know you had to modify it so thanks stef :thumbup:

 

[jstrats]

How deep is the screed? 4 weeks is not enough time imo. Is the screed sand and cement? anhydrite?

Screed is 75mm sand/cement
Exterior path is 100mm poured concrete on compacted hardcore

 

[The Legend; Phil Hobson RIP]

I have always thought that 1mm per day up to 40mm then 2 days per mm thereafter, I know this is not always practical.

I also understand Ditra and the like/ green screed adhesives can reduce this time, but the old 4 weeks drying time is risky.

I will stand to be corrected.

 

[DHTiling]

Is the screed a pourable type ?

 

[Sean SML Tiling]

Ageee with you Phil its a little risky tiling after 4 weeks. Drying times are there for a reason so id always follow instructions to cover my butt because if anything went wrong its my pocket that gets hurt.

 

[J Sid]

Schluter say detra can be layed on screed (with a suitable adhesive) as soon as you can walk on it, and can then be tiled. No need to wait weeks for full cure.

 

[Sean SML Tiling]

Well that's a risk I would never take. My personal opinion. Everyone is different and Everyone will say different its what yoy think os best as its your job. :thumbup:

 

[jstrats]

Is the screed a pourable type ?

Screed has not been poured, i will get the UFH heating commissioned after 3 weeks and give that a week's use, will the Durabase not be suitable to use after that?

What adhesive will be suitable for the Durabase and for the tiles?

 

[DHTiling]

Screed or concrete ?

 

[jstrats]

Screed or concrete ?

Sorry Dave i don't fully understand your reply

 

[Concrete guy]

Schluter say detra can be layed on screed (with a suitable adhesive) as soon as you can walk on it, and can then be tiled. No need to wait weeks for full cure.

This was one of the fundamental reasons behind the very design and development of Ditra Matting, to allow fast track installation on green screeds.

I understand how these specifications have become belt and braces over the years, particularly since I quit tiling, but we fitted 1000m2's of limestone and marble on concrete screen with UFH over the years and never needed any form of uncoupling membrane on a properly set screed.

The only time we did use Ditra was on green screeds, as back then, that's what it was designed for.

BTW, Azul Valverde (Blue Valley) is a lovely Portuguese stone, very dense for a limestone but it's an absolute pig to grout when flamed. Do consider "pointing" instead of grouting, it will save time in the long run.

 

[DHTiling]

Sorry Dave i don't fully understand your reply

Is it screed or concrete ..? 2 different things.. screed will dry quicker than concrete.