You picked the perfect Roman shade. The color matched your sofa, and the linen texture looked stunning in photos.

You installed it, pulled it up for the first time, and a thick band of bunched fabric sat right at the top of your window. A quarter of the glass was gone.

That bunched fabric has a name: shade stack back. Most people never measure for it when ordering shades, and that's exactly why so many beautiful window treatments end up blocking the light and view they were supposed to frame. Once you understand what causes it, you can measure for it, plan around it, and avoid a costly surprise.

Quick Look: How Much Does Each Shade Type Stack?

• Roman Shades: 7 to 14 in. (largest stack of all types)
• Roller Shades: 2 to 3 in. (smallest stack, best for full view)
• Cellular / Honeycomb: 1.75 to 4.5 in. (low stack plus energy savings)
• Woven Wood / Bamboo: 9 to 16 in. (natural beauty, but bulky when raised)
• Zebra / Dual Shades: 2 to 3 in. (low stack with adjustable light control)

One simple rule: shades that fold produce more stack. Shades that roll produce less.

But what exactly does "stack back" mean?

What is Shade Stack Back?

Stack back height is the vertical space your shade occupies at the top of the window when it is fully raised.

Think about folding a bath towel. No matter how neatly you fold it, the towel still has thickness. A shade works the same way. When you raise it, the fabric has to go somewhere. It bunches, folds, or rolls into a compact mass at the top of your window frame.

That mass is your stack back.

A Quick Clarification: Height vs. Width

The term "stack back" appears in two contexts in the window treatment world, so it helps to clarify early.

• Shade stack back is vertical. It measures how many inches of the window get covered from the top down when the shade is raised.
• Curtain stack back is horizontal. It measures how far gathered fabric extends along the rod when panels are pushed to the sides.

This guide focuses entirely on shade stack back, the vertical measurement.

Knowing the definition is one thing. Knowing why it affects your daily experience with a shade is another.

Why Stack Back Matters

Most homeowners measure window width and height before ordering shades. Those two numbers get you a shade that fits. But accounting for stack back is what gets you a shade that works the way you pictured it.

Ignoring stack back leads to four specific problems.

Less Natural Light Than Expected

A 10-inch stack on a 48-inch window blocks roughly 20% of the glass area. On smaller bathroom or kitchen windows, the proportion gets even worse. The room feels darker on sunny days, even with the shade fully open.

Obstructed Views

The stack sits at the very top of the window, right at standing eye level. If you chose shades to enjoy a garden or city view, a thick stack forces you to duck to see past it.

Hidden Architectural Details

Crown molding above the window? Decorative trim on the frame? An inside-mounted shade with a large stack buries those details under folds of fabric every time the shade is raised.

Interference on Doors

French doors and patio sliders need low stack back. A bulky fabric bundle at the top of a door can snag on handles, block the swing, or simply look out of place.

These issues all trace back to one variable: how much your specific shade type stacks.

How Each Shade Type Stacks

The way a shade operates (folding, rolling, or compressing) directly determines how much space it takes up when raised.

Roman Shades: 7 to 14 Inches

Roman shades produce the largest stack back of any common shade. The fabric folds into horizontal pleats as it rises, and each pleat adds thickness.

• On a 48-inch window, expect about 9 to 10 inches of stack.
• On a 72-inch window, that number climbs to 12 to 14 inches.
• Heavier fabrics and blackout linings push it even higher.

If you love the soft, layered look of a Roman shade, pair it with an outside mount (explained below) to keep the stack off the glass.

Roller Shades: 2 to 3 Inches

Roller shades have the smallest stack back available. The fabric wraps tightly around a tube at the top, so the "stack" is just the diameter of the rolled fabric plus the headrail cassette.

• Stack stays around 2 to 3 inches regardless of window height.
• This makes rollers the top choice when maximizing view and light matters most.

Cellular (Honeycomb) Shades: 1.75 to 4.5 Inches

Cellular shades compress accordion-style, and the honeycomb structure folds nearly flat.

• A single-cell shade (3/8 in.) on a 48-inch window stacks about 2.25 inches.
• A double-cell shade (3/4 in.) on the same window stacks about 3.25 inches.
• You get the benefit of insulation with a relatively compact profile when raised.

Woven Wood and Bamboo Shades: 9 to 16 Inches

Natural woven materials are stiff and thick. They resist compression, so the stack rivals or exceeds Roman shades.

• Expect 9 to 16 inches depending on weave density and window height.
• The texture is beautiful, but you need to plan your mounting position carefully.

Zebra (Dual) Shades: 2 to 3 Inches

Zebra shades roll onto a tube just like roller shades, so the stack back is nearly identical: 2 to 3 inches regardless of height.

The alternating sheer and opaque bands also give you adjustable light control without adding any extra bulk.

Stack Back by Window Height (Reference Table)

To get a more precise estimate, here is how stack scales as windows get taller.

Window Height	Roman	Roller	Cellular (3/4 in.)	Woven Wood	Zebra
24 in.	7 to 8 in.	~2 in.	~2 in.	9 to 10 in.	~2 in.
36 in.	8 to 9 in.	~2.5 in.	~2.5 in.	9 to 11 in.	~2.5 in.
48 in.	9 to 10 in.	~2.5 in.	~3 in.	11 to 12 in.	~2.5 in.
60 in.	10 to 11 in.	~3 in.	~3.5 in.	12 to 13 in.	~3 in.
72 in.	11 to 12 in.	~3 in.	~3.5 in.	13 to 14 in.	~3 in.
84 in.	12 to 13 in.	~3 in.	~4 in.	14 to 15 in.	~3 in.
96 in.	13 to 14 in.	~3 in.	~4.5 in.	15 to 16 in.	~3 in.

Values are approximate. Always confirm with your shade supplier before ordering.

That covers how much each type stacks. But where that stack ends up depends on how you mount the shade.

Inside Mount vs. Outside Mount: Where the Stack Lands

Your mount style controls where the stack ends up. The shade itself doesn't change. What changes is where it sits relative to the glass.

Inside Mount

The shade installs inside the window frame. When lowered, it looks clean and built-in.

When raised, the stack piles up inside the frame and covers the top portion of the glass. This works well with low-stack shades like rollers, cellulars, and zebras, where 2 to 3 inches of coverage is barely noticeable.

Outside Mount

The shade installs on the wall above the window frame. When raised, the entire stack rests on the wall space above the glass, not on the glass itself.

Your window stays 100% clear. Outside mounting also makes windows appear taller.

This is the recommended approach for high-stack shades like Romans and woven woods, and for smaller windows where every inch of glass counts.

How High Should You Mount?

A practical formula:

Minimum bracket height above frame = Expected stack back + 2 to 3 inches

For example, a Roman shade with a 10-inch stack should be mounted at least 12 to 13 inches above the top of the window frame. That way, the full stack clears the glass when the shade is raised.

	Inside Mount	Outside Mount
Pros	Clean, built-in look. No wall drilling above frame.	Full view preserved. Windows look taller. Hides uneven frames.
Cons	Stack covers top of glass. Needs adequate frame depth.	Needs wall space above window. Shade extends beyond the frame.

With the right mount decided, you are ready to measure.

How to Measure for Stack Back (4 Steps)

Most people measure width and height, then stop. Adding stack back to your process takes about five extra minutes and catches the issue before it becomes permanent.

Step 1: Find Your Shade's Expected Stack

Check the reference table above, or look for "stack back height" (sometimes labeled "stacking height" or "stack-up") on the product spec page. If it is not listed, contact the manufacturer. Any reputable brand will have this number.

Step 2: Measure Your Window

For inside mount, measure the height of the window opening from the top of the frame to the sill at three points (left, center, right). Use the largest number.

For outside mount, measure from your intended bracket position down to where you want the shade to end.

Step 3: Calculate Clear View

Clear view = Window height minus stack back height

Example: A 48-inch window with a Roman shade stacking 10 inches gives you 38 inches of clear glass. That means about 21% of the window is blocked when the shade is fully raised.

Step 4: Decide Your Mount

If the clear view looks acceptable, inside mount works fine.

If you are losing too much glass, switch to outside mount. Use the formula from the previous section to set your bracket height, and the stack will clear the glass completely.

You now have the stack number, the mount plan, and the measurements. There are also a few ways to reduce stack back even further.

Tips to Minimize Stack Back

• Choose lighter fabrics. A sheer or light-filtering Roman folds much flatter than heavy lined velvet.
• Skip the extra lining when possible. Blackout layers nearly double each fold's thickness. If total blackout is not essential, an unlined or room-darkening option stacks less.
• Use roller or cellular shades on small windows. On windows under 36 inches tall, Roman and woven wood shades can cover a third of the glass. Rollers and cellulars stay under 3 inches.
• Mount outside and mount high. Installing brackets 10 to 12 inches above the frame clears most stacks entirely.
• Ask your supplier for exact data. Stack back varies between brands and even between product lines from the same brand. A quick message to the supplier removes the guesswork.
• Add a valance or cornice. If visible stack is unavoidable (common with inside-mounted Romans), a matching valance conceals the folds and gives the window a finished look.

Once you have the stack under control, the last step is picking the shade that fits your room.

Choosing the Right Shade for Your Space

If maximizing the view is your priority, roller shades are the strongest choice. With only 2 to 3 inches of stack, your window stays almost entirely clear. They work especially well in living rooms, offices, and any room where natural light matters.

If you want soft, layered style, Roman shades paired with an outside mount give you the luxurious fabric look without sacrificing too much view. Mount high, and the stack disappears above the frame.

If energy savings matter most, cellular shades combine honeycomb insulation with compact stacking. A practical pick for bedrooms, nurseries, and climate-conscious homes.

If you want light control with minimal stack, zebra shades let you fine-tune light levels with alternating sheer and opaque bands, all on a roller mechanism that barely adds any bulk.

Not sure where to start? The measurement guide from Joydeco will lead you through the full process, and the free swatches program will let you feel the fabric at home before ordering.

Pull It Up, See It All

Stack back is the measurement that rarely gets mentioned until the shade is already installed and the top of your window has vanished behind a wall of folded fabric.

Now you know what it is, why it matters, how each shade type compares, how to measure for it, and how to choose a mount strategy that keeps your view intact.

Before you place your next order, take five minutes to run the numbers. That small step is the difference between pulling your shade up and smiling, or pulling it up and wondering where your window went.

FAQs

What is shade stack back?

It is the vertical space a shade takes up at the top of the window when fully raised. The folded, rolled, or compressed fabric sits between the headrail and the visible glass.

How much stack back do Roman shades have?

Typically 7 to 14 inches. Taller windows, heavier fabrics, and added linings all increase the number.

Do roller shades have stack back?

Yes, but only about 2 to 3 inches. The fabric wraps around a tube, so the stack barely changes regardless of window height.

How do I reduce shade stack back?

Use an outside mount installed well above the frame. Choose lighter fabrics, skip heavy linings, or opt for roller or cellular shades instead of Roman or woven wood styles.

Inside mount or outside mount for less stack back?

Outside mount. The stack rests on the wall above the glass instead of sitting on top of the window.

Does window height affect stack back?

For folding shades (Roman, woven wood, cellular), yes. Taller windows mean more folds and more stack. For rolling shades (roller, zebra), the effect is minimal because the fabric wraps around a tube rather than folding.