Mortar not setting, installed travertine tile over a proflex membrane on sat. and mortar still has not set. Is this normal?
Installed Travertine tile over Proflex membrane on Sat. and mortar still has not set up. Used a premixed premium mortar for stone and tile.12x12 tile 1/4 x 1/4 notched trowel.
You posted this twice---Sorry --you used a water soluble premix--you should have used modified thinset
That stuff needs air to dry--with a membrane and 12x12 tiles there is no air.
You will need to remove the tiles--scrape off the mastic--scrub every thing clean and use the right product.
I went to their web site--they recommend using modified thinset--that comes in a bag and is mixed with water.
Sorry to be the bearer of bad news---Mike--
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