Bottom up blinds also referred to as upside down blinds or reverse blinds. They work by rolling up from the bottom of the window to the top of the window using a tension pulley system. The blind can be stopped at any desired point using a cleat. They are perfect for windows at street level or bathroom windows where you want privacy without blocking the light.
The right bottom up roller blind, correctly fitted, will make a big difference to the whole look of your room.