Inside Mount vs. Outside Mount: Which Is Right for Your Windows?

When you order custom window treatments, one of the choices you will make is the mount: inside the window frame or outside it. It sounds like a small detail, but it affects the entire look of the window, how well the treatment blocks light, and whether small obstructions get in the way. Here is what each option means and how to decide.

Inside Mount: Clean and Built-In

An inside mount sits inside the window frame, so the treatment fits within the opening and shows off your window trim and depth. It gives a clean, built-in, tailored look and is the most popular choice when the window has enough depth to recess the treatment. The trade-off is that a small gap of light can appear at the edges, which matters most in bedrooms.

Outside Mount: Coverage and Light Control

An outside mount attaches to the wall or trim above and beyond the window, covering the whole opening and then some. It blocks more light around the edges — ideal for bedrooms, media rooms, and nurseries — and can make a window look larger and taller. It is also the go-to when a window is too shallow for an inside mount, or when you want to hide an off-square or unattractive frame.

How to Decide

• Choose inside mount for a clean, built-in look when the window has enough depth.
• Choose outside mount to maximize darkness (bedrooms, nurseries, theaters) or make a window appear larger.
• Outside mount when the frame is shallow, out of square, or you want to conceal it.
• Shutters are usually inside-mounted or framed; shades and blinds work either way.

The right mount depends on your window depth, the room, and the look you want — and it is exactly the kind of detail our designers confirm when they measure. Precise measuring is essential either way, because a custom treatment is built to those exact numbers. We serve homes across Sarasota, Lakewood Ranch, and Venice.