Top Down Bottom Up Cellular Shades: Privacy Ideas for Every Room
on Oct 28 2026
Quick Answer: Top down bottom up cellular shades have two moving rails, so you can lower the shade from the top, raise it from the bottom, or leave a covered section in the middle. That lets natural light in over eye level while the lower glass stays covered, which makes them the best privacy option for street-facing bedrooms, bathrooms, living rooms and home offices. Choose light filtering for daytime rooms and blackout fabrics for bedrooms.
Standard bottom up shades give you two choices: cover the window or expose it from the bottom. Top-down bottom-up (TDBU) shades add the positions people actually want, such as sky light without a view into the room. Below we explain how they work, the positions you will use most, fabric and operating choices, and room-by-room ideas. Every style is available in our motorized cellular shades collection.
What Is a Top-Down Bottom-Up Cellular Shade?
A regular cellular shade has a fixed headrail and one moving bottom rail. A TDBU shade adds a second moving rail at the top, called the upper rail or middle rail, so the fabric hangs between two rails that move independently. You can drop the upper rail down to open the top of the window, lift the bottom rail to open the bottom, or set both to frame a band of fabric anywhere in the window opening.
The fabric is the same honeycomb material used in standard cellular shades, so you keep the insulating air pockets of the honeycomb cells while gaining much more light control.
How Top Down Shades Bring Light In Without Losing Privacy
Most of what neighbors and passersby can see is at eye level and below. Lowering a shade from the top opens the upper glass, where you mostly see sky, trees and rooflines, while the covered section blocks the view in. Daylight from high glass also travels deeper into a room. Retailers describe this as bringing in morning light from above without exposing street-level views.
| Position | How to set it | Best for |
|---|---|---|
| Fully closed | Both rails together at the bottom and top | Night privacy, sleep, maximum insulation |
| Top down | Lower the upper rail 12–24 in; bottom rail stays at the sill | Daylight with privacy at eye level |
| Bottom up | Raise the bottom rail like a standard shade | Views and ventilation when privacy is not an issue |
| Middle band | Lower the top and raise the bottom | Blocking a neighbor's window or low sun at mid-height |
| Fully open | Both rails stacked at the top | Maximum view and daylight |
A useful rule of thumb: on a ground-floor window, lowering the top about a third of the way usually keeps the room private from the sidewalk while letting in most of the useful daylight. Check from outside once, then save that position.
Choosing Cellular Fabrics for Light Control
Sheer and light filtering
Light filtering cellular fabrics diffuse sunlight into soft, even light and reduce glare on screens, and they block a share of the UV rays that fade floors and furniture. They suit living rooms, kitchens and home offices. Sheer fabric is even brighter and keeps more of the outdoor view. Remember that both can show silhouettes at night with lights on inside, so close them fully or pair them with a darker shade in bedrooms. Our motorized light filtering TDBU cellular shades are the everyday choice for most rooms, and a sheer TDBU version is available for spaces where light matters most.
Blackout fabrics
Blackout fabrics block nearly all incoming light and give complete privacy at night, which makes them the right call for bedrooms, nurseries and media rooms. Expect thin lines of light at the edges with any inside-mounted shade; an outside mount that overlaps the frame reduces them. TDBU blackout is especially practical in bedrooms: open the top for daylight while you dress, close fully to sleep. For colder rooms, our motorized blackout double cell TDBU cellular shades add a second layer of insulating cells.
Cordless, Cord Loop or Motorized Top Down Bottom Up Shades?
TDBU shades come in three operating styles, and the choice matters more than with standard shades because there are two rails to move.
| Operating style | How it works | Pros | Cons |
|---|---|---|---|
| Cordless top down | Push or pull handles on each rail | No dangling cords; simple | Hard to reach on tall or large windows; two rails to adjust by hand |
| Cord loop | Continuous cord loop with a clutch | Easier on large windows | Visible cords; safety concern with children and pets |
| Motorized | Motor moves each rail by remote, app or voice | Precise positions, schedules, no cords, easy on high windows | Higher cost; batteries need recharging |
If you choose cordless operation, place the shades on windows you can reach comfortably, since you will adjust two rails. For anything tall, wide or behind furniture, motorization is the practical answer. All Weffort TDBU cellular shades are motorized and cordless, so there are no cords to tangle and no dangling cords near children or pets.
Smart Control for Top-Down Bottom-Up Shades
Motorized TDBU shades let you lower the shade from the top, raise it from the bottom or stop anywhere in between with a remote, wall switch, smartphone app or voice. Weffort cellular shades work with Apple HomeKit, Google Home, Amazon Alexa and SmartThings; see our smart home systems page for setup.
Schedules are where TDBU really pays off:
- Morning: lower the top 18 inches at sunrise for daylight with privacy.
- Midday: close fully on west or south windows during peak sun to cut heat and glare.
- Evening: close completely at sunset, before you switch on artificial light.
For windows you cannot reach, read our guide on choosing motorized shades for high, hard-to-reach windows.
Room-by-Room Privacy Ideas
Living rooms facing the street
Lower the top third during the day so the room stays bright and the sofa area is screened from the sidewalk. Light filtering fabric in a light color keeps the room airy.
Bedrooms
Use blackout TDBU. Open the top for morning light, then close fully at night. For maximum privacy on a ground-floor bedroom, keep the bottom rail at the sill all day.
Bathrooms
TDBU is the classic bathroom solution: daylight above, cover below. See our guide to cellular shades for bathrooms for fabric and humidity tips.
Home offices
Lowering the top while keeping the bottom closed cuts low-angle glare on screens and still lights the desk. If glare is your main problem, compare options in our article on dual shades for home office glare.
Bottom Up Shades vs Top-Down Bottom-Up Shades
| Feature | Standard bottom up shades | Top-down bottom-up shades |
|---|---|---|
| Moving rails | One (bottom rail) | Two (upper rail and bottom rail) |
| Daylight with privacy | Limited; light only by exposing the bottom | Yes; open from the top |
| Positions | Open or closed from the bottom | Top open, bottom open, middle band, closed |
| Cost | Lower | Higher |
| Best for | Upper floors, private views | Street-facing rooms, bathrooms, bedrooms |
Energy Efficient Year-Round Comfort
TDBU cellular shades keep the insulation of standard cellular shades. The U.S. Department of Energy notes that cellular shades trap air within each cell and between the shade and the window, reducing nighttime heat loss and drafts, and its research found savings of up to 20% on heating energy compared with no shades[1]. A shade only insulates when it is closed, so pair TDBU with schedules that close the entire shade on winter nights. For extreme climates, choose double cell; our comparison of single vs double cell cellular shades explains the difference.
Measuring: Inside Mount or Outside Mount?
TDBU shades are made to the exact dimensions you supply, so measuring is the step that matters most.
- Inside mount: the cleanest look. Measure the width at the top, middle and bottom of the window opening and use the narrowest; measure the height left, center and right. You need enough frame depth for the headrail; expect small gaps at the sides.
- Outside mount: better for shallow frames, large windows and blackout. Add about 1.5 to 3 inches on each side so the shade overlaps the frame and blocks more light at the edges.
Follow our cellular shade measuring guide for the full steps before you order.
Everyday Care
Dust TDBU shades monthly with a soft brush or a vacuum on low suction. Blow dust out of the cells with compressed air or a hair dryer on cool. Spot clean marks with a damp cloth and mild soap, and never soak the fabric.
Frequently Asked Questions
Are top down bottom up shades a good choice for my home?
They are worth it on any window where you want daylight and privacy at the same time, especially street-facing rooms, bathrooms and bedrooms. On upper-floor windows with a private view, a standard bottom up shade is usually enough.
What is a top-down, bottom-up cellular shade?
It is a honeycomb cellular shade with two moving rails. You can lower the fabric from the top, raise it from the bottom or position a covered section anywhere in the window.
What are the downsides of cellular shades?
Cells can collect dust, inside-mounted shades leave small gaps at the edges, and TDBU versions cost more than standard shades. Manual TDBU shades also mean adjusting two rails by hand, which motorization removes.
What is the difference between honeycomb and cellular blinds?
There is no difference. Honeycomb shades, cellular shades and cellular blinds are different names for the same pleated fabric shade with air-trapping cells.
Can top down bottom up shades be motorized?
Yes. Motorized TDBU shades move the top and bottom of the shade by remote, app or voice, and can follow schedules. All Weffort TDBU cellular shades are motorized.
Ready to bring light in and keep views out? Order free fabric samples to compare light filtering and blackout options at home, then shop our custom motorized cellular shades in single cell, double cell and top-down bottom-up styles.
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