side by side blinds comparing inside versus outside installation

Installation: Inside Mount vs Outside Mount

When it comes to installing blinds, shutters or shades you have two mount options to choose from: inside mount and outside mount.  This choice will need to be made when we come to measure your windows.  The type of mount will change the length and width needed.

Not only are the two mounts visually different, there also will be differences when it comes to setup and how they function.  So which way of mounting a window covering is best?  Let’s cover the pros and cons of each to help you decide which option is right for your home.

Inside Mount

What exactly is Inside Mount?  This is when your window covering is installed inside your actual window frame.  Chances are that you will see this style more often since it is more traditional.  It is the way we recommend having your window coverings installed  unless you have obstructions in your window frame or it’s just too shallow.

Inside mount roller shade ligh filtering utah


The Pros of Inside Mount


TAKE UP LESS ROOM: With your window treatment mounted within your window frame it takes up less room vertically and horizontally.  Giving you more room on the walls for shelves, pictures and other wall decor.  It’s perfect in a small room that doesn’t have a lot of wall space.

CLEAN FINISHED LOOK: Being tucked away inside the window frame not only takes up less room but it offers a minimalist, clean and finished look.

VISIBLE TRIM: When you’ve spent a lot of money for beautiful wood trim you don’t want to cover it up with window coverings.  That’s definitely something you want to show off.  Inside mount makes this possible.

ENERGY EFFICIENT: Installing shades or blinds as close to the window as possible with a snug fit between the walls provides added insulation to your home.  This ensures that the outside air does not seep into your home as easily, which also provides better energy efficiency for your home.

EASIER LAYERING: If you like the look of layering different products, then making sure your blinds or shades are tucked neatly inside the frame will allow them to not get in the way of your curtains or drapery.  This provides a much cleaner look to your windows and allows everything to function a lot better.


The Cons of an Inside Mount


OBSTRUCTIONS AND SHALLOW FRAMES: Inside mount is most commonly recommended, however there are a few instances that limit the ability to install your product as an inside mount.  If you have a window that has any obstructions, such as handles, alarm sensors or cranks, then the usable depth of the window frame may be too shallow.  This will make it difficult and maybe even impossible for the inside mount to work properly.


Outside Mount


As opposed to inside mount when the coverings are mounted inside the window frame, outside mount is mounted on the wall above the window or directly on the trim.  Because of this the blinds or shades will need to be wider and taller than your window opening.

Outside mount light filtering rollershade utah


The Benefits of an Outside Mount


COVERS UNSIGHTLY CASING OR TRIM: If the trim or casing around your windows isn’t worth showing off you can cover it with an outside mount.  Usually blinds are best for this since the louvers can be adjusted to let light in, but it still covers the trim.

ROOM DARKENING: With an outside mount, since your blinds or shades overlap a bit over the walls on the sides it helps provide more room darkening. If room darkening is your goal then you may want to opt for installing room darkening shades instead of blinds as the blinds will let light seep through a little more.

APPEARANCE OF LARGER WINDOWS AND TALLER CEILINGS: This trick of the eye can make your home appear bigger than it actually is. Because an outside mount requires that your window treatment be wider than your window frame opening, your windows appear to be wider. It also makes your ceilings appear higher because outside mounts can also make your window look taller. 

WINDOW HARDWARE IS MORE ACCESSIBLE: If you have window cranks, handles, and or alarms in the window frame then having the window treatment outside the window frame allows them to be unobstructed.  You also won’t have to worry about the window crank pushing out your shades or poking through the blinds. If you have windows that fold into the room for cleaning purposes, an outside mount shutter would be the ideal way to go.

COVERING A DOOR: If you’re looking to cover a door then you will need to choose an outside mount.  This is generally the only option since most doors don’t have enough room for an inside mount.  Even if you have a sliding glass door with a deep window frame, the option for inside mount may be lost due to the room the handle requires.


Cons of Outside Mount


TAKES UP MORE WALL SPACE: With an outside mount you are needing to make them wider and taller than your window frame.  This means it will take up more room, so if you don’t have a ton of space between your windows it may make it difficultIf you have a small room, every little bit matters, so having an outside mount may take up too much room and make your windows look too large for the space.

COVERS DECORATIVE TRIM: Like we mentioned above, an outside mount will cover your trim.  So if your trim is worth showing off then you won’t want an outside mount since the only time you’ll see the trim is when the shade or blinds are fully open.

NOT AS ENERGY EFFICIENT: For your window covering to be more insulating you want the pocket of space between the window and the covering to be smaller.  With an outside mount you are not able to install close to the window, which leaves a larger space for air.  So if you’re looking for something to help with insulating, an outside mount is probably not your first choice.



Choosing between an inside mount and an outside mount option will come down to your needs and what is aesthetically pleasing in your home.  Our window coverings are all custom ordered, which gives you more options to choose from. Our design consultants will help you figure out what’s right for your home. They will walk through your home with you and help you narrow down your options.  CLICK HERE To Schedule Your FREE In-Home Consultation Today!


This entry was published on December 3, 2020.

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