Hi,
About a year ago I had a new 6m x 6m kitchen extension. The porcelain tiles are 80cm x 80cm, and over both the concrete floor of the extension as well as the wooden floor of the old part of the house, and over underfloor heating. We put detra mat down over the whole area, but the tiler used a very thick layer of adhesive...not sure if that makes a difference. Between tiles is about 2-3mm of Norcros flexible grout.
Across the whole floor the grout started cracking and coming out of the gaps, beside some tiles more than others. The builders came back to rout out the grout and replace, but it happened again almost immediately. I can hear a couple of the worst-affected tiles are moving slightly when walked upon, and I'm not sure if the grout on the other tiles are expanding/contracting or also moving to a lesser extent. I can't replace the whole floor...but would a very flexible grout such as Granfix's 'Ultimate flex' grout (suggested on another query) do the trick do you think? Is it more flexible than Norcros flexible grout?
Many thanks!
EML
About a year ago I had a new 6m x 6m kitchen extension. The porcelain tiles are 80cm x 80cm, and over both the concrete floor of the extension as well as the wooden floor of the old part of the house, and over underfloor heating. We put detra mat down over the whole area, but the tiler used a very thick layer of adhesive...not sure if that makes a difference. Between tiles is about 2-3mm of Norcros flexible grout.
Across the whole floor the grout started cracking and coming out of the gaps, beside some tiles more than others. The builders came back to rout out the grout and replace, but it happened again almost immediately. I can hear a couple of the worst-affected tiles are moving slightly when walked upon, and I'm not sure if the grout on the other tiles are expanding/contracting or also moving to a lesser extent. I can't replace the whole floor...but would a very flexible grout such as Granfix's 'Ultimate flex' grout (suggested on another query) do the trick do you think? Is it more flexible than Norcros flexible grout?
Many thanks!
EML