"No" wrote in message ...
"WirelessNut" wrote in message
oups.com...
Where in the sandwhich would the "roll of waterproof sealer" go (as you
mention in #8)? On top of the concrete board? This is in addition to
the roofing felt, yes?

I wouldn't use it. Not really nesecary. if you did it would go behind the
backerboard, in place of the roofing felt. Nothing should go between the
tile and backerboard except the thinset or mastic.


Actually the waterproof fabric goes over the backerboard to prevent water
from hitting the backerboard and is attached using thinset. Thinset is then
used on top of that to attach the tile. It completely waterproofs the area
from water penetration due to leaks and spills. It would go over the walls
and across the floor if the floor is tiled.Every join would be overlapped
causing a completely sealed area. Roofing felt is an exterior product and
should not be used inside a dwelling.