I got the glass through a local shop. My situation was different, as only one wall, the "front" door wall, was glass. The other three walls were kerdi and tile. The sloped glass ceiling was captured in the walls on three sides and clear silicon was used to seal the remaining side to the front wall of glass. I'm not sure what type of specific seal was used on the door. It might have been clear vinyl. If you do a search or ask at the glass shops, it might also help if you refer to it as a "raked" (sloped) front wall of glass. Actually, lemme see if I can get a quick google hit... Found one at Wilson Glass. Not exactly what you're looking for though. Using something like that with a sealed transom overhead would work and be the lest expensive. Having the front wall as a single piece of glass with the door cutout of it would be $$$$$.

Besides adding the new master bath, we're also gutting the main part of the house (kitchen, family room, living room, and dining room.) The walls around the kitchen won't be put back, and the wall between the the family room and living room will be moved a few feet and contain a double-sided gas fireplace. So....no vaulted ceilings anywhere else in the house after the remodel. I was hoping to have a chandelier over the tub. That might help feel like the ceiling height is brought down some. I have a feeling that the GC has already ordered the scissor trusses for the vault, so it might be too late to change. I couldn't reach him late today. On the other hand, maybe it will make the bathroom feel special if it's the only vaulted room in the house! Maybe??

pinktoes -- That may be overkill. We have Nu-Heat in the floor of our master bath, and two floor registers from the gas-fired forced air furnace. This is a north-facing room with a roughly 66-inch X 80" archtop window (north) and two additional windows (west). The floor area is 11 X 14 and the ceiling angles from 9 feet to a flat that is 12 feet high. We're in the far north suburbs of Chicago -- haven't seen the ground since the beginning of December with ice and snow. My Ultra-Bain air tub has a heater and our shower is glassed, but open a couple of feet at the top (not totally enclosed like a steam shower). A friend in AZ had a walk-in (no door) shower that was so 'breezy' she showered in the guest bath. We'd be in real trouble in our master bath without the floor heat because the HVAC guy was a dope. We'd planned for the Nu-Heat there, but ended up adding a small boiler and tubing under the other north-facing rooms because the ducted supply was inadequate. I really think the Nu-Heat is doing almost all the work in our bathroom. Could you just wire for that space heater and add it only if needed? Will the bathroom floor heat be on its own thermostat? While we're talking warm bathrooms, let's not forget to put DOORS on our bathrooms, folks! (And heat vents in the toilet rooms.)

We have a similar construction (cathedral ceilings, no skylight). We removed the wallpaper (ours was floor to ceiling wallpaper) and painted walls white. We did the same, remodeled the hall bath first and used that while the MBath was being remodeled. The hall bath we added a sink and kept the original 70s hanging lights (chrome globe) over the vanity. Our bath/shower in that one is perpendicular to the exterior wall, so I painted that wall as an accent (kids picked the color, its a screaming lavender). Figured that short wall wwould joe be easier to repaint than the higher walls.