ceramic floor tile

Old 08-10-03, 07:04 AM
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Talking ceramic floor tile


I am going to lay ceramic tile on my bathroom floor. I plan on using premixed, sanded adhesive and polyblended, sanded tile grout. You guys are the pros, so I have several questions for you:

1) Do I need to prep the slab in any way (to prevent moisture from getting under the tile, etc.), or can I just apply adhesive directly on the concrete slab and then set the tile? Since the project will be done where there'll be lots of moisture, this is a concern of mine.

2) What if there is a small, jagged crack in the slab? The crack is in the corner where one wall meets another, and the crack runs across diagonally. The visible portion is about a foot long, but I am not sure if the crack continues through to the other sides of the walls. I ask this because I've been reading the forum, and I just want to be sure.

3) Before and/or after laying the tile, do I need to apply any kind of special/extra sealer for around the pedestal sink, bathtub, or toilet? I plan to use grout sealer, I just didn't know if there was anything different for around those areas that may apply since I don't want tiles popping up do to an unknown leak or something.

I apologize if my questions are redundant, but I just want to do the job right. I am sure you folks are the best ones to guide me. If there's anything else you know about from experience that a beginner like me may not have thought of, please let me know. I appreciate any and all good advice. Thanks!
Old 08-10-03, 03:46 PM
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if this area is to see alot of water then you may want to use a membrane sucha s blue 92 or a rubber membrane like mapei keralastic those will also take care of the crack in the slab.Around the pedastel and toilet you can use 100% silicone caulk to seal those edges and at the tub also.The only prep to the slab would be to isolate the crack and get it clean of any foriegn substances such as grease dirt wax any thing that will hinder the bonding of the mortar to the concrete.Read the label but most sealers want you to wait at least 72 hours before sealing,make sure everything you dont want on the floor is off before sealing caus eit will be permanant after you're done

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