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Unread 01-16-2020, 12:21 PM   #9
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Join Date: Jan 2020
Posts: 5
Thanks for the comments

I appreciate all the great input. Yes, the heating is in the slab, so the isolation layer is between it and the tile. Our tile seller is now researching the alternative products mentioned in this thread. The contractor who is against Ditra is remaining insistent that no isolation layer is needed because of his reinforcements and insulation; however, this argument is not persuasive to us. We are happy to pay for the insulation layer. We are giving this contractor the option of building the sunroom but letting the tile seller do the tile installation. The tile seller is willing to guarantee all his work.
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