When choosing window blinds for your home, deciding whether to mount them inside or outside the frame can be difficult. At first glance, the difference can seem subtle, but it has a real impact on how your blinds look, how they function, and how much light they block.
If you’re unsure which option is right for your space, here’s a closer look at both styles, along with their advantages and limitations.
As the name suggests, inside mount blinds are installed within the window frame (also known as a recess fit). This style is often chosen for its neat, minimalist appearance and space-saving design, and remains one of the most popular options for modern homes.
When it comes to layering window coverings, inside mount blinds are a practical choice. Because they sit within the frame, curtains or drapes can be installed over the top without interfering with their operation. This allows you to combine blinds with curtains for added insulation, improve light control throughout the day, and add softness to the overall look of the room. Layering is particularly useful in bedrooms and living areas where both function and style matter.
If your window frames are a feature, inside mount blinds help keep them visible. Rather than covering the frame completely, the blinds sit neatly within it, allowing timber or decorative finishes to remain part of the overall design. This works well in homes where the window framing adds character to the space.
Inside mount blinds can be installed close to the window glass, which helps keep the windowsill clear. This is useful if you keep plants or décor on the sill, open and close windows regularly, and want a cleaner, less obstructed look. Because the blinds don’t extend outward, they won’t interfere with these everyday uses.
The compact design of inside mount blinds makes them well suited to smaller rooms. Since they don’t project into the room, they help maintain usable space and avoid making the area feel crowded. This is especially helpful in bedrooms, apartments, or tighter layouts.
Inside mount blinds cannot fully block out light on their own. Because a small gap is required on either side for the mechanism to operate, some light will pass through. This may not be noticeable in living areas, but it can matter in bedrooms where full darkness is preferred. If complete light control is important, you may want to compare options like roller blinds with blackout fabrics or consider an outside mount instead.
Not all windows are suitable for inside mounting. You may run into issues if the window frame is too shallow, there are handles, locks, or mullions in the way, and the frame is uneven. In these cases, outside mount blinds are often the more practical option.
Outside mount blinds are installed outside the window frame, typically on the wall or above the trim. Because they aren’t restricted by the dimensions of the frame, they offer more flexibility in both sizing and placement.
If your window frame doesn’t have enough depth to support an inside mount, outside mounting is a straightforward solution. Since the blinds are installed externally, you don’t need to worry about internal space limitations or obstructions.
Outside mount blinds are more effective at reducing light gaps. By extending beyond the edges of the window, they can cover the entire opening more completely. This makes them a better option for bedrooms, media rooms, and spaces where glare needs to be reduced. For even better results, blackout materials can help improve light control further.
If your window trim is worn, uneven, or outdated, outside mount blinds can help cover it. This can be a simple way to improve the look of a window without needing to repair or replace the frame itself.
Outside mount blinds can be used to change the perceived size of a window. By installing them higher and wider than the frame, you can create the impression of taller ceilings, wider windows, and a more open space. This approach is often used in living rooms and bedrooms to improve the overall proportions of the room.
Outside mount blinds are generally more forgiving when it comes to measurements. Because they don’t need to fit within a tight frame, there is more flexibility in sizing and positioning. This can make the process easier, especially if your windows are slightly uneven.
Because outside mount blinds sit beyond the window frame, they can take up more visual space. In smaller rooms, this may make the area feel slightly more enclosed if not positioned carefully. In these cases, an inside mount may provide a cleaner result.
Choosing between inside and outside mount blinds depends on your space and priorities. Inside mount blinds suit clean, minimal interiors and well-proportioned window frames, while outside mount blinds work better for maximum light control, shallow frames, or creating visual impact. In many homes, a mix of both can work well depending on the room.
If you’re comparing styles, it can also help to explore options like venetian blinds or vertical blinds, as some designs suit certain mounting styles better than others.
Both inside and outside mount blinds have their advantages. The right choice comes down to how you want your blinds to look, how much light control you need, and the structure of your windows.
If you’re ready to explore your options, you can browse our roller blinds Auckland and full custom blinds NZ to find a solution that fits your home.
