Hello, I have a bathroom where the builder installed a shower head (by
mistake) over our whirlpool tub. The tub has a tile splashguard (two rows
of ceramic tile topped by a bullnose row of tile, for a total of three
rows). I've decided to go ahead and finish the tiling so that we can use
the shower. The tile is installed directly onto green board. My questions
are these:

1) Is it okay to continue the next rows of tile above the bullnose if I
seal it good above the bullnose and the row of new tile (perahaps with a
good caulk of silicone)?

2) Given that this shower will only be used perhaps once or twice a
month (it is a secondary bathroom), will it be okay on the green board if I
seal the grout on an annual basis?

Since this home is only 4 years old, I'm loathe to tear out the wall and put
in cement board. Also, what alternatives are there to tile that would look
good? I would install it above the existing rows of tile. Most surrounds
I've seen look like they wouldn't go in well with the oversized tub and
existing tile. I've toyed with the idea of glueing acrylic sheet to the
wall and then caulking the seams with white silicone, but am afraid it won't
look good when I'm done. (But then I wouldn't be able to play with my new
Rotozip tile cutting bit :-) )
Thanks for the help,
Craig caheaton(AT)netzero.net (AT) = @