These photos are of the basic preparation for ALL major builders in many areas of Ontario. The seams if taped at all, are taped with drywall compound. In this case there wasn't even anything laid upon the jacuzzi frame . Exposed 2"x8"s is what the tile setter is expected to set the tiles onto. In most of the cases the installer will use mastic to bond the tiles and hope to hell the installation will hold so there won't be a call-back within a year.
If you see this type of preparation in your new home, confront the builder and have him do it right. It isn't asking for an upgrade .... it's simply asking for the right installation of ceramic tile.
Try to imaging what will happen to the tile installation as these boards cure over time while humidity levels are always changing in this room.
The boards will twist, shrink and expand causing the tiles and grout to loosen and crack while allowing moisture to pass through into the greenboard which will cause noticable problems with the entire installation.
Just remember, the one year warranty doesn't protect the home buyer ... it protects the builder.
