I am doing the floor tile in a house that is around 50 years old. The house
was built by "kids" back in the 60's and they made a lot of errors.
Examples: the aggregate used in the concrete was smooth river rock. No wall
insulation was required so none was done. Several drain pipes under slab
were barely sloped and on and on.
Now, the homeowner wants to put in floor tile throughout the house. There is
no carpet in the house, only 50 year old lino tiles. We knocked a few loose
to see what was going on under and everywhere we looked we found spider
cracks. Lots of them. The cracks start in stress points of the pour and
meander through the slab all over the place. There is not a lot of
displacement (1/16" max), but water is leaching up through the cracks in
Without tearing the whole slab out and repouring it, does anyone know of
anything I can do to the slab to put new tile down and have it last? People
have suggested anti-crack sheet membranes, roll-on membrane solutions,
patching the cracks somehow, etc. I am trying to get the slab leveled out,
and put 18x18 floor tile down that will last.
Anyone have any ideas for this?