Posted by Dave Gobis on September 05, 19100 at 05:15:48:
In Reply to: Ceramic on cracked concrete posted by Steven McCrary on September 04, 19100 at 21:08:05:
: We are trying to solve a problem with a slab-on-grade kitchen floor that has both vertical and horizontal movement in a 5-year old house. We have gotten several different recommendations on solving the problem from several floor guys.
: The vertical movement in the floor is very small, less than 1/32-inch, and the horizontal movement is less than 1/8-inch. We would like to put ceramic on it.
: Will a subfloor be adequate to install the ceramic over? What kind of subflooring should we use?
: Or should we remove the concrete floor and rebuild it, underpinning it with a new shallow piling?
: Thanks,
: Steven McCrary
: Grove, OK
: smccrary@acc.jbu.edu
Steven,
You could install a membrane and isolate the crack, however, membranes are designed to accommodate horizontal movement. Vertical is a seperate issue a membrane can not address. You would have to be the judge on that. Here are some links that will describe different types of products:
http://www.noblecompany.com/waterproofing.htm
http://www.nac-anti-fracture.com/ecb.htm
You could also look at www.schluter.com under ditra.
Good Luck,
Dave