Hello, you just need to provide space for the centrepiece which is 7 cm square, depending on the opening of your door, the curtain can be hung in parallel or perpendicular.

Hello,
I confirm Frelechox's answer. o.
But if your request is to know if from a door, where a part of the barrier is fixed, you can secure on two different walls, I don't think so. Unless you buy 2 barriers or create a removable system to move the part intended for both walls.

I have fixed it between two walls and it holds very well. I suppose it is possible to fix it on a door. After that it depends on how you would fix it. I've diverted the use because I use it so that my cats don't come and disturb us during the night and don't wake up our 6 month old son. Later it will be used for its real function.