Here's our shower before being tiled by others. Anyone have an issue with this? Specifically greenboard along the top? His argument is that's how it's usually done. You could use the concrete board all the way to the top, but a) water doesn't get up that high so if there's water damage, you have bigger problems and b) tile sticks better to greenboard on the ceiling of the shower? Is he shoveling manure or is there legitimacy in any of that? How much more would concrete board add to a job like this?[ATTACH]66192[/ATTACH]

I've been asked to do minor brushup on the tiles in the bathroom, and the person has this right on the bathtub edge: [ATTACH=CONFIG]67342[/ATTACH] [ATTACH=CONFIG]67343[/ATTACH] Large size: [url]https://s20.postimg.org/ynjbvtmf1/WP_20160612_002_1.jpg[/url] [url]https://s20.postimg.org/sk1rbww59/WP_20160612_001[1].jpg[/url] Underneath it looks like some sort of plywood or something. It's all rotten I think but still fairly sturdy. What should I do with it? Can I just get new tiles and lay them right over this or should I take the whole thing off? Should I but a new piece of plywood in place and will regular tile adhesive work? Also they have this little portion of a tile that's fallen off. Is it better to peel off the whole tile or just cut a piece to fit that hole? [ATTACH=CONFIG]67341[/ATTACH] [url]https://s20.postimg.org/xjz7jv1rx/WP_20160612_003[1].jpg[/url] Thank you.