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Old 03-11-2018, 07:36 PM   #2
jadnashua
Veteran DIYer- Schluterville Graduate

STAR Senior Contributor

 
Join Date: Jul 2004
Location: Nashua, NH
Posts: 12,115
The tile installation does not meet the industry standards. Pretty much nothing they do to it except tear it out and start over will fix that. Tile will not survive if there's movement like you indicated plus, even if it was up to par, you must use a highly modified thinset mortar to bond directly to wood. The joist structure does meet standards, but you CANNOT tile directly to dimensional wood...period. The fact that they are also not T&G makes it even messier.

Are the slats perpendicular to the joists, or on the diagonal and how thick are they?

https://www.radiantsource.com/docs/P...OK_USA-MED.pdf

The documentation specifically calls out plywood or osb on the subflooring. See page 6.
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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.

Last edited by jadnashua; 03-11-2018 at 07:43 PM.
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