ceramic tile flooring
#1
11-07-07, 08:08 PM
ceramic tile flooring
I tore up some old stickdown vinal tiles in my kitchen and want to lay ceramic tile. Problem is the concreate slab is very sticky with old glue. Do I need to worry about this or can I spread my thin set and go at it?
Tommy D
Tommy D
#2
11-08-07, 04:46 AM
Welcome to the forums! In order to properly lay ceramic tiles on your existing subflooring, you will need to install a concrete backer underlayment (CBU) over it and then the tile. This tends to strengthen the floor and gives you a better, water resistant substrate for the tile. Since you have to install the cbu, don't worry too much about the stickiness. Durock and Hardie make good cbu and it can be found in 1/2" as well as 1/4" 3x5 sheets. You will probably only need a 1/4".
#3
11-08-07, 06:56 AM
Group Moderator
Chandler: does he need a backing since he's on slab? We never use anything under the tile on slab and it's worked fine so far.
#4
11-08-07, 08:45 AM
Member
Agreed, no cbu over a slab.
Either set the tile over the slab or install an isolation membrane over the slab and then tile.
Either set the tile over the slab or install an isolation membrane over the slab and then tile.
