8 Choices That Make the Windows Useless for Light or Air

Windows are meant to bring in natural light and let you get some fresh air—but some common design choices block them entirely. If your house feels dark and stale, your window setup might be part of the problem. Here’s what tends to ruin their purpose.

Overcrowding the Sills

Lining your windows with plants, trinkets, or picture frames might look cute, but it cuts down on the sunlight coming in and makes it a pain to open the window. If you’re constantly moving stuff to get airflow, you’ll stop bothering.

Mounting Curtains Too Low

If your curtain rod is hung right above the window frame, it’ll block light even when open. Hang rods higher and wider than the window to make the whole thing feel bigger—and to keep more sunlight flowing in.

Using Heavy Blackout Drapes All the Time

Blackout curtains have their place, but using them in every room kills your natural light. Unless it’s a bedroom or media space, swap them for lighter panels or layer them with sheers so you still get light without glare.

Blocking Vents or Returns

If you place furniture in front of a window and accidentally block the air return or a vent nearby, it messes with both airflow and temperature regulation. That can lead to stuffy rooms and even AC issues.

Choosing Windows That Don’t Open

A lot of modern designs use fixed windows that don’t open—especially for aesthetics. But without an operable window in the mix, you’ve lost your easiest form of ventilation. At least one window in each room should open fully.

Forgetting to Clean the Screens

Dusty or clogged screens can block a surprising amount of light and make airflow feel stuffy. If your windows are technically openable but don’t seem to be working like they should, try removing and washing the screens thoroughly.

Using Window Film on the Wrong Side

Some privacy films or tinting jobs are installed on the wrong side or are too dark for the space. That blocks natural light and creates a dull cast on everything. If you need privacy, try frosted panels or adjustable blinds instead.

Keeping Shades Closed Out of Habit

If the first thing you do every morning is flip on the lights and keep the blinds shut, your windows are being wasted. Get in the habit of opening them up when the sun’s not too harsh—you’ll use less power and feel more awake, too.

*This article was developed with AI-powered tools and has been carefully reviewed by our editors.