Hi Stephen ;
I don't comment here very much, but before buying equipment and transitioning to restoration in the mid nineties , I did custom marble installations for many years prior, in the Florida Keys a demanding upscale market where we installed miles and miles of travertine,would hone and polish onsite to provide a finished product no one else could duplicate.
First: why did the architect spec thinset for a soft,fragile stone,that set properly,should be set on full mortar beds?
Second: are the installers planing to add anything to the mortar to give more body to be like "medium bed mortar"?,typically thinset,even mixed stiff will sag during set time, corners sink,and results in a lot more lippage
II have seen hundreds of travertine jobs set entirely in grey mortar,nearly every one has darkening ,dirty ,grey ,undertones,that restorations help but never fix.
I like 252, got enough latex ,for a tenacious bond, and can be manipulated to make awesome bed mortar ,however I only use white
All is not lost,this can be successfully done if each stone , is totally and completely back buttered with high quality "white" flex able multi-purpose thinsets.
Tile setters use thinsets, marble installers use "fat mud" back buttered
Hope this helps
"Blessings"
Scott Wilson
Wilson Stoneworks Inc

Sent from my iPad

> On Sep 18, 2014, at 10:51 PM, Stephen Webb <stephen@newlifemarblerestoration.com> wrote:
>
> Hey all I have  a question, An architect  friend has already purchase 20 pallets of the laticrete 252 silver.  The color is grey.   I have done a scratch coat sample on the back of the travertine to see if any bleeding was noticed.  It has been approximately 2 weeks and there are no visible signs of the grey thinset leaching through the tile.  Since the architect has already purchased the thinset and ready to proceed with the work, they are now stuck with the grey thinset.   Is there any law or guideline referring to the use of grey thinset with a beige colored travertine?  I am hoping that there is some clarification regarding the acceptability of the grey thinset usage on a beige colored travertine.  Any input would be greatly appreciated.  Thank you!
> Stephen
>
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