There s no wall on either side of the window just the other window frames.
Inside mount blinds vinyl windows.
Blinds can be inside mount and outside mount depending upon the depth of your windows.
The top of the window frame is flush with the ceiling so the only other option is to hang the blinds from the ceiling which seems less than optimal.
Mount the hanging brackets in the correct position inside mount.
An inside mount is when blinds or shades are installed inside the top of the window frame.
If you have vinyl windows you won t be able to screw the brackets directly into the vinyl channel that holds the window.
For inside mount the brackets are attached to the top of the opening directly on the trim or on the sides.
Mark the positions of the bracket holes with a pencil.
Use a tape measure if needed to place the brackets.
Outside mount or ceiling mount.
The vinyl is not strong enough to hold the weight of the blinds.
For outside mount the blinds are screwed onto the window trim or anchored into the drywall or into the plaster.
Finally vinyl window frames can make it tricky to install inside mount blinds because the vinyl isn t strong enough to directly support the weight of the blind.
Fix the brackets to the top or sides of the inside opening or install them outside the opening.
When installing them inside the opening make sure the bottom.
If you are considering a window replacement and want to inside mount the blinds afterward it s important to take careful measurements to ensure everything will fit with the new vinyl windows.
Try to mount them in a position that will allow the screws to sink into wall studs especially for large bulky heavy window blinds.