RAW, can a caster stack castings of Leomund's tiny hut on the exact same area?
As in, when the remaining duration is greater than the casting time, they would ritual-cast it a second time.
(The motive for needing to do this is to make the hut more resistant to disintegrate/dispel magic. Layered effects need to be taken down one by one, a la the good old prismatic wall).
Best Answer
You can cast it but it won't do anything.
PHB 205:
If your goal is to keep a constant Tiny Hut up without interruptions, then yes, you can cast it multiple times and the spell will constantly stay up--the second hut will take effect as soon as the first one runs out (or is otherwise dispelled or destroyed). However, it does waste a bit of the duration of the second spell, since the clock on the second casting starts as soon as it is cast.