Fair enough. I don't really understand the point of a wet room though. Especially a small one. Go in, have a shower and soak the place, then get dressed then want to go for a pee in your socks? Doesn't make sense to meI know of no reasons why you cant install a wet wet room in a loft. Lots of companies actually specialise in wetrooms for loft conversions.
It will be frosted yes, judging by some of our neighbours frosting can vary We'll definitely have shutters or blinds anyway, it's south facing so could get super hot in summer with the sun on it all day. E.g. our first floor bathroom does get very hot when it's 20c+ outside.why do you need shutters - isn't it privacy frosted ? will there be an opening window panel though, to help with the extraction duties..
You might be right, and I'm half tempted by moving the door to next to the window. I've just done measuring and the chest of drawers I've shown in the Sketchup (to scale) would actually fit next to a 630mm door there. (I think) Our first floor bathroom is at the top of the stairs and occasionally in the night I've had a moment, but it is what it is... Architect didn't seem to have an issue.having a bathroom just at top of stairs does sound a safety issue
The shower wouldn't actually be all that small though. Can probably do 700x1100mm I think in the current layout. Hell I've just measured the bath/shower in our main bathroom and that's less than 700mm wide where the glass panel is.As commented, space looks tight, parents don't use their onsuite shower much since it is not very comfortable to turn around & efficiently shower;
do you have hot water supply for 2 simultaneous showers too, I think I'd just have a (genuine) ensuite with basin+loo.