Replies

1. 
   Scooter1 | Feb 05, 2004 08:20pm | #1

   Thinset ain't gunna stick to linoleum, Pete. Either remove it and scrape the slab down removing all the residue of mastic (cutback) or pour some SLC over it. I would recommend a membrane, the membrane won't stick to the linoleum either.

   Regards,

   Boris

   "Sir, I may be drunk, but you're crazy, and I'll be sober tomorrow" -- WC Fields, "Its a Gift" 1934

1. 
   billyg | Feb 05, 2004 10:33pm | #2

   If you pour SLC over cutback adhesive, I recommend flat troweling some modified thinset over the cutback adhesive first.  SLC doesn't stick very well to cutback.  It may stick for a year or two, or maybe more, but it's not worth the risk of separation.

   Billy

1. 
   Scooter1 | Feb 05, 2004 10:49pm | #3

   Not a bad idea, Billy.Regards,

   Boris

   "Sir, I may be drunk, but you're crazy, and I'll be sober tomorrow" -- WC Fields, "Its a Gift" 1934

1. 
   billyg | Feb 05, 2004 11:02pm | #4

   I'm doing it myself tonight, before a SLC pour this weekend. 

   I jackhammered off most of the cutback so I'll use the thinset on the spots that I missed.  Many people don't realize that the oil-based cutback cutback actually soaks into the slab like a sealer.  When I look at pieces of the slab that I chipped out, I can see the cutback penetrating into the concrete about 1/8 inch.  Because I'm putting in heat under the tiles, I don't want the SLC popping off the slab during the heat/cool cycles.

   Billy

2. 
   JeffBuck | Feb 06, 2004 01:16am | #5

   Thinset will stick.

   Tile we laid in my Dad's entry about 17 yrs ago is still looking fine .. he went right over the existing "real" linoleum ... probably 80 yrs old at the time.

   Not that I'd recommend this on a customers job ... but I'd try it again in my own home in a heartbeat.

   This was before we learned the beauty of modified thinset too ... can't remember if he mixed in any liquid latex.

   Jeff

   Buck Construction   Pittsburgh,PA

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