debi, here's the thing: True cement board is made of non-organic "ingredients". Nothing cellulose-based, like the paper facing on gypsum board. Cement board will not degrade when undergoing long periods of water saturation. It will not degrade after repeated wetting and drying cycles like the gypsum core in gypsum board. So does cement board itself have moisture protection and mold resistance? Yes. Because there's nothing organic in it to feed mold, and there's nothing in it that will degrade from water exposure. But you'll note that it does not say cement board is waterproof. It's not. Water can wick right through it. And what's on the other side of the cement board? Your house's wood framing. Again, you'll find manufacturers telling you about their specific product, but they can't say how their product will interact with or protect materials attached to it. So cement board is essentially not affected by moisture. Your house's wood framing will be affected by moisture. Insulation can be affected by moisture. So you have to decide how to prevent moisture generated by your shower from reaching the wood framing or any insulation within the framing bays. Obviously the tile and grout will shed most of the water. But that's why a barrier of some sort needs to be included before residual moisture and moisture vapor driven through the assemble can reach the wood framing. There are a lot of people who build incorrectly. Some through ignorance, some through apathy. Two dollars worth of 6-mil plastic could have solved this before the cement board was installed. You can unscrew the cement board, hang the poly and reinstall the cement board. Or leave the cement board up, mesh tape and mud the seams, then use a topical membrane to waterproof the CBU. Based on the path this thread has taken, I'll toss this out. When you tile, don't use mastic. Don't use any premixed comes-in-a-tub type of adhesive.

Sorry I can't give you a recommendation on where to get your glass because I am in the Milwaukee area not Madison. We have softened city water in our house so we don't have to deal with the complications of well water. The best tip I can give you is to take 30 seconds to run a squeegee over the glass when you are done showering. We didn't do that at first and had some issue with water spots. When I had trouble getting the spots off, I called the glass company and they told me to make a paste of Zud cleanser on a wet #0000 (extra fine) steel wool pad and scrub the glass with that. It worked great but was more work than I wanted to do very often. Much easier to squeegee. With well water you should probably consider using special glass such as ShowerGuard or glass treated with Clear Shield or another special coating. You could always go with a slighty textured or patterned glass. My daughter has well water and she used a glass that is called crystal rain. It's patterned on the outside but inside is smooth so its easy to clean. It great for hiding water spots in between weekly glass cleaning. Good luck with getting your remodel done. Dont feel bad about your 4 year project, my sister has a bathroom that's been 7 years in the making. Right now it has a shower and toilet but still no sinks/ vanities. I am a former public school special ed. teacher so I understand about getting projects done during summer break.

I love my under mount tub ...it is very comfortable. The back slopes; I never have banged my head on the ledge. I use mine daily - I prefer a bath to a shower. An under mount gives me a place to set my morning coffee without spilling it on the tub ledge and plenty of room for the morning paper or my Kindle. I am short, so I wanted one that wasn't too long - a 60" works great for me. I've never understood free standing tubs - where would you put everything? And a drop-in would have an uneven ledge and I'd spill my coffee.

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