tile over greenboard around a tub

I have googled for this info, but all I can find are articles preaching that this is completely unaceptable..
Since 1) I have had bathrooms in 5 houses over the last 35 years with drywall backer and never had a problem..
2) This bathroom is only for a guest area in the basement, and rarely used...
3) I have already installed the greenboard 4) If this was a main bathroom, now, I would use cement backer board
I need the info as to how best to cut the drywall, and tile to butt up to the bathtub.
Right now I have overlapped the tub flange about 1/2" with the greenboard, which leaves about 1/2" gap to the tub surface. I was thinking of running a bead of silicon to seal the edge of the greenboard, then tiling over to about 1/8" of the tub, then calking the gap between the tile and the tub.
Does this sound OK ? Thanks for any info or experiences
Ray
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On 6/14/2012 10:21 AM, Ray wrote:

edge 1/4 round tile moulding.
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I would say, green board is just moisture resistant. Might be something better for wet areas. The other thing, there is a backer made from impenetrable material, like a membrane with notches, if used correctly, stops any water or moisture from going back to the drywall. Like a plastic of sort. Not cement. I see it being used on tv.
Greg
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It will be fine for light use. Good to leave a gap between greenboard and tub so water does not wick up. Fill tub b4 caulking. Use thin-set not mastic. I just did mine with Densamor which has fiberglass instead of paper covering and a water resistant core so no mould will grow. Much easier to use than cement board and almost same cost as greenboard.
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Hardipanel is easy to use but it is somewhat more expensive. I'd never even try tiling a wet area without it.
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