R
Rich
As far as Im aware you only need to prime the boards when installing ufh, I was told by the nmp rep that priming is more likely to reduce the bond of the adhesive. cement boards are impervious to water as the are.
Im only asking to try to work out what has gone wrong with your floor.
Is it possible that there were voids left under the tiles? If not then it may have been a void under the cement boards?
Im only asking to try to work out what has gone wrong with your floor.
Is it possible that there were voids left under the tiles? If not then it may have been a void under the cement boards?