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Unread 08-14-2019, 10:31 AM   #7
Kman's Avatar
Join Date: Nov 2006
Location: NW Arkansas, Ozark Mountains
Posts: 11,370
Originally Posted by Sands
He installed the tiles over backer boards and the sheet that looks like a bubble wrap.
Can you be any more specific on the products used? Do you have any pictures of them before or during the installation? Is anything listed on an invoice or estimate that might indicate what he used?

Originally Posted by Sands
My basement roof is still open so perhaps I will check the direction of joists.
I have a theory based on your answers, so that might be important.

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