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Old 02-12-2018, 05:53 PM   #6
Veteran DIYer- Schluterville Graduate

STAR Senior Contributor

Join Date: Jul 2004
Location: Nashua, NH
Posts: 12,410
In that case, tear off the membrane with the tile. In general, it's not all that hard to scrape up the thinset on the floor. Pulling the tile up off of the membrane will destroy most of the bonding fleece, and may also loosen it from the substrate, making it mostly useless. The membrane will act like a cleavage layer, and let you tear off the tile easier than it might if they were bonded directly to something like cbu. For that type of membrane, the industry standard calls for a minimum of 50psi shear strength. A tile bonded directly to cbu could easily have 5-10x more strength in shear.
Jim DeBruycker
Not a pro, multiple Schluter Workshops (Schluterville and 2013 and 2014 at Schluter Headquarters), Mapei Training 2014, Laticrete Workshop 2014, Custom Building Products Workshop 2015, and Longtime Forum Participant.
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