Inside Mount shades are contained within your window frame. You may prefer an Inside Mount as it provides a finished look without covering your molding; also allows more clearance to layer Drapery, or Valance over shades. Be sure to check your windows for "squareness", since Inside Mounted shades will not operate properly if windows are not "square."
Outside Mount shades are mounted on your wall or molding. Even if your windows have enough frame depth for Inside Mount, you may prefer the extra room darkening and privacy Outside Mount provides, since greater window coverage reduces light leak at shade edges.
Side Mount is useful when shades cannot be mounted to the top of the window frame.
Note: To accommodate the roller mechanism, your finished shade fabric will be 1-5/16" to 1-5/8" narrower than you specify on your order, causing a light gap with Inside or Side Mount. If you require maximum light control and privacy, we recommend Outside Mount.