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Unread 01-06-2020, 05:17 PM   #8
Veteran DIYer- Schluterville Graduate

STAR Senior Contributor

Join Date: Jul 2004
Location: Nashua, NH
Posts: 13,324
The heat will work, its response will be a little slower. But, with radiant heat, often, the best practice is to keep it on as the thermal mass just doesn't change much. Having it above, and closer to the tile is useful if you are using it for warming versus area heating. For example, in CA, floor warming, done by electrical heating elements, must be on a timer, and cannot be used for area heat. Hydronic, in the slab, does not have that restriction.
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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