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Does the pre-slope pan have to be smooth? Mine is kind of rough in some places has a sand roughness. If it does have to be smooth what is the best way to smooth it? I thought of mixing some cement powder and just put a very thin smooth top. I bought some concrete adhesive to put in between the top coat and pre-pan.

What do you think?

Thanks for any help

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It only needs to be smooth enough to get the water in the pan to go to the drain, and not poke a hole in the pan while working the mud bed for the tile over it. If there are any sharp ridges even a trowel can scrape those down flat enough to be of no concern.

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