Decent quality sliding - or folding sliding doors - will do the job and last more than 15 years. Of course you have to fit them properly for a good seal so choose an experienced fitter, a specialist fitter or buy a door that can be fitted by the manufacturer. As with anything, you get what you pay for. Untreated softwoods are likley to warp over time so treated woods, hardwoods or metal doors will perform well over a longer period.

Hi DM! Here's our floorplan to give you an idea of where some of our FDs are. As you can see the front/main entry opens up to the Gentlemans Parlor. I have lace panels on the front door and it's sidelites like this... They are actually 84 inch length tab top "macrame" panels that I wove through the lace with the bottom rod giving the flounce and ruffle at the bottom or they would have been too long. It worked and I loved it. What you can't see is the frosted contact paper through it. Here's a terrible shot of the door, but you can see the sidelites with the contact paper. It looks much better in person. I took it at night with a flash making it looks shiney, which it's not. This was a temporary treatment when we first moved in. Just a long piece of semi sheer fabric wrapped around the rods and tied in a knot. If I wanted more light I clipped the back part of the fabric behind the knot. Cost less than three dollars with dollar fabric found at Wal Mart while they still had fabric. Here's a close up of the panels I have in the Gentlemans Parlor and the shades that are at the moment the photo was taken inside their housing, which will be painted to match the rod when I have time. As you can see they don't match the main entry window in any way. Oh the walls will be painted to match the curtains when the weather keeps us from work outside. The color there now was to be a basecoat for a faux finish my hubby changed his mind about. The sunroom FDs looked similar to the original temp front door treatment... But will possibly look like this next photo/drawing if I have enough fabric left after making six 90inch panels for the five window across the back of the sunroom. They are button up Roman style shades. As you can see by the above pictures, well other than our home isn't finished yet, that I don't think all the french doors need to be treated in the same way. Though we'll probably find a way to add sliding french/glassed doors between the GP and sunroom because the colors do not blend. Do you have photos or floor plan drawings of how these two sets of french doors set in your home?

Me again, glad to hear your attic is insulated. I have no idea why I fixated on that last time, I think I was just imagining cool towels meeting wet air and seeing condensation happening all over them! Anyway, what a nice space you have to work with! With a bathroom, though, fixtures tend to hug the perimeter of the space, just as you have drawn the room. It makes for a nice 6x8 space for dancing in the center of the room, useless for anything else, since the two of you will be crossing it in so many different directions! So twirl your partner when you happen to meet in the center. You could possibly change the direction of the tub under the window so that the foot or head of the tub were directly under the window, and the tub was jutting out into the room, kind of parallel to the toilet wall (or is it a half wall?). For this to work, the vanity of the tub user would be moved over to the right, so that this person kind of walks around the tub a bit to get to it. You could put in an "L" cabinet there, giving the tub user a bit of a sitting vanity at the South end of the window (lets pretend this map is done on the NSEW coordinates). Day lighting and makeup table may go together well. Or not. Back at the current vanity area, we have possibly created room to insert a shallow Towel Tower 2' - 3' wide and as high as you like or need, between the two sink vanities. Try to keep it 1 ft deep, as the other occupant still has to squeeze past on the way to the vanity on the right. Maybe the towels can be rolled and placed into a grid, so they will stack while rolled and slid into their cabinet. Like bottles in a wine rack. The other obvious place I saw for a towel-holding piece of furniture was next to the door as you enter from the closet area. If the little potty alcove is as small as you have drawn, a dresser could be placed there to hold bath linens. I will go shopping at Pottery Barn for an example, and post it here. One way to make your walk-in shower not need any glass door or shower curtain would be to curl in the "wall" or "glass" that is represented by your dotted line. By simply adding a curve to that wall and making the entrance walk a little bit past that curl, you will keep most of the water of the shower contained. If you want to be sure that steam escapes so the shower will dry out, you have a good fan exhaust system to run after the shower, and you do not have the shower walls go much higher than the head level of the occupants. If the walls are solid, people may appreciate having such a large shower be low enough to see out of, as well. Here is a link that might be useful: dressers to hold towels

Any door manufacturer should offer some of their door styles in 12". Not all doors will be available in that size. Is it a real door or a cabinet door? Jeldwen and other interior door manufacturers would be a place to start. These will be custom doors. Good luck!