1. Decide whether a face fix or a top fix is most appropriate:
Face fix, which is when you fit the brackets to the window frame, with a face fix, your blinds will sit outside of the recess and overlap with the wall, giving you the added benefit of blocking any light that may appear around the edges.
A top fix lets your blinds hang within the recess, saving space and creating a streamlined, snug fit when you fit the brackets to the lintel at the top of the window. The fit you choose depends on a number of factors, including what kind of blinds you chose, the amount of room you have and even personal preference.
2. Screw your bracket into the wall.
3. Install the blinds onto them.
4. Attach your safety device.