Hey There, of course you can get a bottom-up top-down shade in 100 inch width. Cordless? NO! How do you want to bring it up and down? It is a huge shade and a Lite-Rise or Easy-Rise system will never work. Motorization is your only option...or you do chain operated.

I don't know the height of your shade but you better have deep pockets. It will cost you between $1,300 to $1,800 plus shipping.

Best of Luck

What did you end up deciding on? We just got a bid for a Hunter Douglas Applause top down/bottom up cellular shade in 120 inches length. It is cordless and not motorized. So yes it can be done, obviously custom. I am still contemplating it. We just are not curtain people and I like the simple look of cellular shades. But I still might end up breaking it into three blinds (2 sliders on the end of the windows). As another commentor said, it is a very big shade, and although two different window treatment designers have recommended it, I keep looking at the window and imagining this very large shade.

I'd be weary, even if they're a good brand like Hunter Douglas. we have two different brands of cellular blinds. one cordless, one with a single loop cord. they each had totally different problems. the cordless ones were fine at first but went slightly slack on one side, making them crooked. the corded ones are not slack at all, but the strings seem off balance so they're also crooked. The reps told us there is no way to fix them. I can fix old school mini blinds by pulling different strings, but when it comes to these newer shades, the string winding mechanisms are contained inside the header and I couldn't find a way to access them.

granted my brand was cheaper, so maybe Hunter Douglas will not do that. but be sure to ask your rep what to do if they go crooked. will they fix them? (if they say that they can't be fixed but they'll replace them, run away. do you want to ask for new sets of replacement blinds every couple of years, and then toss the old ones in the landfill?)

as far as cordless -- I wouldn't recommend that for really wide shades. it's easier for one hand to go up higher and make them crooked, and then you have to stand there and adjust. imagine how annoying that would be on super wide shades. the loop cord is easier to operate.

I love mod, those are some very good points to consider!

We've had nothing but trouble with our 92" HD top-down/bottom up. It's failed 3 times. I would never get one that big ever again. A smaller 64" failed too after 3 years. I wouldn't push their limits.

one of the large retailers here in Canada would not manufacture over 96". we decided to break the window width into 3 given their are two operable and one big one fixed in the middle. we originally wanted top down bottom up cellular at the front main floor, but decided to go zebra as we felt they looked nicer close up than cellular. we will do top down bottom up for 2nd floor bedrooms.