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    countrybumpkin's Avatar
    countrybumpkin Posts: 5, Reputation: 1
    New Member
    		  
    #1

    Sep 5, 2007, 12:03 PM
    Tile won't stick to concrete slab
    We are re-modeling our bathroom in a 27 year old home. Have tore up the cement bed in the shower, replacing our shower liner and then pouring our mortar mix. When starting to lay the tile down, we find that our pre-mixed adhesive is not holding the tile down very good. It seems as though the mortar mix has a lot of sand in it. Can you please help me and tell me what we need to do.
    peaden1711's Avatar
    peaden1711 Posts: 27, Reputation: 0
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    #2

    Sep 5, 2007, 12:09 PM
    Try using a premixed thinset . Make sure that you vacuum motar bed real good!
    cpalmist's Avatar
    cpalmist Posts: 137, Reputation: 32
    Junior Member
    		  
    #3

    Sep 5, 2007, 12:09 PM
    There is a latex additive available to push the adhesion value up - ask your home center guy for it.



    to rate this answer - as 15 good recommends gets you a full tank of gas... Thanks
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #4

    Sep 5, 2007, 12:23 PM
    Wire brush and vac your bed. I think the mortar may have been too dry or not properly troweled.
    glavine's Avatar
    glavine Posts: 895, Reputation: 87
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    #5

    Sep 5, 2007, 05:33 PM
    I know this problam, if you use any tile bigger than 4 or 6" tiles the premixed mortar will not dry, even if you wait a few days it will still be wet. You'll have to pull up the till and use thinset mortar, there are 2 types a white and grey, either will work, if you use a light grout use the white if its dark use grey,
    peaden1711's Avatar
    peaden1711 Posts: 27, Reputation: 0
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    #6

    Sep 5, 2007, 05:47 PM
    Not really I have used premixed on 12"tile on wall and shower floor and never had any problem with it.
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