Deep window trim with projecting lips or blocks will require a deeper headrail to project the shade off the wall and clear the molding.
Roman blinds outside window frame.
The outside recess position if positioned approx 100mm above the recess will give you a nice pelmet when the roman blind is in the up position minimising the loss of natural light and creating a tapestry effect when in the down position.
Outside mount sometimes referred to as outside brackets means that a blind or shade is installed outside of the window frame while an inside mount is installed inside the window opening.
Unlike traditional vertical blinds or shades roman shades are each made from 1 single piece of fabric.
Roman blinds are suitable for outside the window recess fitting.
You can install a new set of roman shades over the course of 3 or 4 hours.
Benefits of outside mount blinds.
Inside mount blinds are often flush with the window s opening and do not cover up the trim.
Inside the window recess if you leave your blinds down most of the time then fitting inside the recess can be the smarter choice.
Mounting a roman shade outside the window frame requires 2 to 3 of wall above the top window trim.