Roman shades can be installed both inside and outside the window frame depending upon your need and the depth of your windows. Structurally we believe that soft fold and dog-ear Roman shade would make a better fit as outside mount than the inside mount.
Roman Shades may be mounted inside or outside the window frame. When ordering your window blind of choice, make sure you specific the correct option that best fits your application. You will need at least 1 inch of window frame depth to mount roman shades although at least 3 inches will be needed for a flush mount.
Outside mounted blinds and shades give the flexibility of choosing almost any window covering for any situation. That is simply because the window frame doesn't matter. You just mount the brackets outside of the window frame and hang your blinds or shades so they extend past the frame.
You can install a new set of Roman shades over the course of 3 or 4 hours. The shades can be installed in 1 of 2 ways: either using an interior mount, where the shades are hung inside of the window frame, or using an exterior mount, where shades are attached to the wall above the window.
Hanging a Roman blind inside of the recess may be a little more awkward as you'll have a limited area to work within and angle your tools within, while Roman blinds hung outside of the window recess are best attached to a batten to support their weight, which means one more thing to do but a potentially easier working ...
In summary, for Venetian, roller and vertical blinds, we would recommend they be hung from within the recess. However, Roman blinds would be better suited outside the recess, as they are able to let more light enter into the room.
As opposed to inside mount when the coverings are mounted inside the window frame, outside mount is mounted on the wall above the window and directly on the trim. Because of this the blinds or shades will need to be wider than your window opening.
Outside Mounted Blinds & Shades Block Out More Light and Provide Full Coverage. Since outside mounted blinds and shades cover more of the window and frame than inside mount blinds, they provide more light coverage.
On a modern Roman shade, you end up with about 3 1/2 inches of stacking once the shade is inside the canister. On a traditional Roman shade, the longer the window, the longer the stacking. It can range anywhere from about 6 inches to 16 inches. Another advantage of the modern Roman shade is the thickness of the fabric.
We recommend letting your roman shade extend at least 1”-1.5” on each side of window to avoid light seepage. So whatever is the width of your window from frame to frame, add total of 2”-3” to that.
“Outside mount” roller shades are usually mounted on the windows upper molding, on the wall just above it, or on the ceiling. Outside mount roller shades are made larger (in both width and length) than the window so the entire window is covered when the shades are drawn.
If it's a yes to curtains, the Roman blind will need to be installed inside the recess, as there will be limited space outside the reveal, and you will want to avoid the curtains fouling on the blind. Fitting Roman blinds inside the recess creates a neat and tidy effect.
Round off your measurements to the nearest 1/8 inch. As a rule, the blinds will look nice if they extend about 3 inches beyond each side of the window opening. So a 42-inch-wide window calls for a 48-inch-wide blind that allows for a 3-inch overlap on each side.
Take a screwdriver and remove the cornice and put the curtains onto the rod and hang them from the brackets. Besides tension rod and curtain rod, there are few other options available such as suspended rods and many more. You can choose them too to hang the curtains high over the blinds.
The bottom of your roman Blind should just touch the window sill when fully closed. You should use the shortest drop measurement if they are different at each end of the sill to ensure you don't have one side too long and crumpling on the window sill.
When they are closed (i.e., down), it looks like plain fabric from outside; when opened, they do look like folds of fabric, and I think that looks fine. They look a bit like roller blinds when they are down - very plain. The look can vary depending on whether they are mounted inside the window frame or outside.
Roman blinds keep light out to a reasonable degree when fully closed even when made of regular fabrics rather than blackout ones; they certainly dim rooms to the extent that many people find perfectly acceptable to sleep in.
Inside mount blinds are often flush with the window's opening and do not cover up the trim. Outside mount window treatments can be mounted on the face of window trim or on the wall above the window. It does not mean the blind is installed outdoors.
Not all shades need to be lined. For simple sheer Roman shades, many designers use the selected face fabric by itself for a visually light appearance. But in other situations, using a lining—a secondary fabric sewn to the back of the face material—can give blinds a more finished, luxurious look.
Measure both the width of the window and the height of the window. Consider adding an extra 3 inches to the width and height for optimum light control and privacy. Extending the blinds outside the window will also provide the space needed for the mounts and help the window appear larger than it actually is.
Roman blinds create a stack at the top of the window when they are opened or raised. This can block the upper portion of your window view and minimize light and air filtration. Roman shades do not usually come in different sizes and shapes, so you need to customize them to fit your window openings.