When installing them inside the opening make sure the bottom.
Inside mount blinds vinyl windows.
The vinyl is not strong enough to hold the weight of the blinds.
There s no wall on either side of the window just the other window frames.
Try to mount them in a position that will allow the screws to sink into wall studs especially for large bulky heavy window blinds.
Use a tape measure if needed to place the brackets.
Blinds can be inside mount and outside mount depending upon the depth of your windows.
An inside mount is when blinds or shades are installed inside the top of the window frame.
For outside mount the blinds are screwed onto the window trim or anchored into the drywall or into the plaster.
Fix the brackets to the top or sides of the inside opening or install them outside the opening.
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.
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.
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.
Mark the positions of the bracket holes with a pencil.
The window treatment brackets are either screwed into the ceiling of the window opening or sides.
Mount the hanging brackets in the correct position inside mount.
I want to hang blinds on the center window in a three window window seat.