There is not much I can say for this product. I am building my own raised hearth pad and this material had the proper thermal protection that I need and want.
When using this product you will not want this directly underneath your tile. I have read that is "squishy". Though it is not as heavy as cement board it is much softer and will flex if you walk or put weight on it. Tile needs to be on a surface that will not give a lot of flex. What I have done is sandwich this board between 1/2 inch cement board. This give the thermal protection and the rigidity for the tile.
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