Why Brownsburg Homeowners Go With Outside Mount (and When Inside Wins)

Brownsburg Window Treatments · 2026-09-22

A blind that looks great in a showroom photo can look wrong on your own window if the mount doesn't match the opening. That mismatch is the single most common regret Brownsburg homeowners mention after a rushed order, and it almost always traces back to a five minute decision made too fast.

Inside Mount and Outside Mount, Defined

Picture the window covering sitting two different ways. Inside mount tucks the whole unit into the frame opening itself, so the headrail lines up flush with the front of the frame and the trim stays fully visible around it. Outside mount does the opposite: the headrail attaches above the frame, on the wall or the trim, and the shade hangs down covering the opening from in front rather than fitting inside it.

A lot of Brownsburg homeowners assume one option is simply the upgrade and the other is the budget choice, and that's not really true. Cost differences between the two are usually modest, tied more to the extra material an outside mount needs to fully cover the frame than to any real quality gap between the mounts themselves.

What actually decides it is the window in front of you. Some frames physically can't accept an inside mount no matter what you'd prefer to pay for. Others could go either way, and at that point it really is a matter of taste, room function, and how much light gap you're willing to live with.

Why Homeowners Choose Outside Mount

Ask yourself first whether the frame even has the depth for inside mount. If it doesn't, or if a crank handle or lock is sitting where the hardware would need to go, the decision's already made for you and outside mount is the answer regardless of preference.

Beyond that forced case, ask how much light control actually matters in that room. A bedroom that needs to go properly dark benefits from outside mount's ability to fully overlap the frame and close the gaps that inside mount leaves open. A home office or a dining room usually doesn't need that same level of light blocking, which is why outside mount shows up more often in bedrooms than anywhere else in a typical Brownsburg house.

Last question: is the frame square? Older homes especially can settle unevenly over the decades, and an out-of-square opening is much easier to work around with outside mount, since the header mounts level above the window regardless of what the frame underneath is doing.

Depth, Obstructions, and Other Mounting Realities

Whatever the room, the frame's actual depth overrides any preference. Faux wood blinds typically need 2 to 2.5 inches of clear space to sit inside a frame properly. Cellular shades can sometimes work with a bit less. Shutters need the most, generally 3 to 3.5 inches, because the panel frame adds real bulk inside the opening.

Kitchens and bathrooms are the rooms most likely to throw a curveball here, since they're also the rooms most likely to have cranks, locks, or plumbing eating into that depth. A bedroom window is usually simpler by comparison, with fewer obstructions to work around.

Sloped sills deserve their own mention, since they're easy to miss on a casual look. A sill that angles down toward the glass instead of sitting flat can make a blind sit crooked or rub against the glass with every use, even on a frame that measures deep enough on paper.

Why Homeowners Choose Inside Mount

Here's a myth worth clearing up first: inside mount isn't automatically the higher-end option. It's simply the option that keeps trim visible and hardware tucked inside the frame, which a lot of people prefer visually, especially where the trim itself was worth the money.

It also tends to sit better in rooms with limited clearance. A kitchen window with a faucet close to the glass, or a stairwell window where anything protruding into the room becomes a hazard, both favor inside mount because the hardware stays entirely within the opening rather than reaching into the room.

The real tradeoff, and the thing most first-time buyers don't expect, is the light gap along the edges. Because an inside mount shade has to be built slightly smaller than the opening to physically fit inside it, a strip of light sneaks around the sides. It's a minor issue in most rooms and a real one in a bedroom that needs to go fully dark.

Mixing Mounts and Getting a Consistent Look Room to Room

Here's something most people don't think about until they're halfway through an order: you don't have to pick one mount for the whole house. A Brownsburg home with deep, original wood frames in the living room and shallower frames in the bedrooms might reasonably end up with inside mount in one room and outside mount in another.

What matters more for a consistent look is keeping the headrail style and color similar across rooms that are visible from each other. An open floor plan where the kitchen and living room share sightlines looks better with coordinating treatments even if the mounts differ.

Within a single room, though, try to stay consistent. A row of three windows on the same wall with one inside mount and two outside mount will look like a mistake even if each individual choice was correct for that window. If one window in a group genuinely can't take the same mount as its neighbors, it's worth discussing the tradeoff before ordering rather than after the boxes arrive.

Inside or outside, the right mount depends on details a photo can't show you. A free in-home measure covers the depth check, the trim question, and the obstruction check in one visit, so you're not making a permanent decision off a guess.

Frequently Asked Questions

Do inside mount blinds work on windows with deep trim?

They can, as long as there's enough clear depth behind the trim for the headrail and the tilt mechanism. Deep trim by itself isn't a problem. What matters is what's actually inside the opening, not how the trim looks from the front.

Will outside mount cover up decorative trim I want to keep visible?

It can, since the headrail sits in front of the frame rather than inside it. If you've got trim you want to keep showing, that's a real point in favor of inside mount instead.

Can a window be too shallow for any mount at all?

Almost never for outside mount, since it doesn't rely on depth inside the frame at all. Inside mount is the one with real depth limits, which is exactly why outside mount exists as the fallback for shallow windows.