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Unread 08-25-2017, 08:20 AM   #4
Dave Gobis
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Join Date: May 2001
Location: Racine, WI.
Posts: 5,667
The industry got rid of the term medium bed because it isn't a mortar bed as some perceive, it is a bonding material. The limitation is a 1/2" to 3/4" depending on the product. You will never find a floor flat enough to accommodate a 36" tile without some flattening regardless of grout joint width. If someone has the skills and the elevation can be tolerated a mortar bed is the way to go.
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