Comparison
Blackout curtains vs blackout liners
One replaces what you have, the other hides behind it. The decision is mostly about whether you like your current curtains.
By Janet H. · Last updated September 23, 2026 · How we choose
A blackout curtain is one panel that both decorates and blocks light. A blackout liner is a plain panel that hangs behind curtains you already own and does only the blocking. Through the fabric, they perform about the same. The decision is about what you already have, how much weight your rod can take, and whether you want to be able to remove the darkness later.
Drape & Dawn earns a commission from qualifying purchases made through links on this page, at no extra cost to you. It does not change what we recommend. Full disclosure.
The decision table
Side by side
| Blackout curtain | Blackout liner | |
|---|---|---|
| What it is | One panel that blocks light and looks like a curtain | A plain panel hung behind your existing curtains |
| Light blocking | High | High — same class of fabric |
| Keeps your current curtains | No | Yes |
| Weight on the rod | One layer | Two layers — roughly double |
| Removable seasonally | Not really | Yes, in minutes |
| Cost | Higher — replacing the whole panel | Lower — adding a plain layer |
| Look | Whatever you chose | Invisible from inside; white from outside |
| Good for renting | Only if you're replacing anyway | Yes — takes 30 seconds to remove |
| Fixes side gaps | Only if wider than what you had | No — inherits your curtain's coverage |
Deciding
Choose a blackout curtain if…
- You are starting from nothing, or you do not like the curtains currently up.
- Your rod is marginal and you would rather not double the weight hanging on it.
- You want one thing to hang, wash and maintain rather than two.
- Your current curtains are too narrow or too short — a liner cannot fix coverage, but a new, wider panel can.
- You want a specific look on the room side that your current panels do not give you.
Deciding
Choose a blackout liner if…
- You like your curtains and only want them to block more light.
- You rent, and want a fix that leaves with you and touches nothing.
- You want darkness in winter and light in summer — unclip it for half the year.
- You have expensive or sun-facing curtains you want to protect from UV fading.
- Your curtains are sheer or decorative and were never going to block light on their own.
What it takes
The cost and effort reality
A liner is the cheaper route because you are buying plain fabric rather than a finished decorative panel, and there is no waste — the curtains you have stay up. Fitting a ring-on liner takes a few minutes per window and needs no tools.
The cost a liner does add is weight, and it is easy to underestimate. Two layers on a rod that was already carrying a pair of lined panels can push a lightweight rod into visible sag and start to pull drywall anchors. Before adding liners to a wide window, check whether the rod has a center support bracket; if it does not, add one. It costs a fraction of a new rod and prevents the failure.
If you land on a liner, the options are in best blackout curtain liners. If you land on replacing the panel, best blackout curtains has the picks.
What we’d buy
The products behind this advice
Picked against the criteria above, not the other way round. We don’t show prices because we don’t have a live price feed — each link goes to the current listing.
| # | Best for | Product | Type | Care | Price |
|---|---|---|---|---|---|
| 1 | If you're adding a liner | Blackout Curtain Liners with detachable rings Curtains you already like, and renters who would rather not replace the landlord's fittings. | Blackout liner | Machine wash cold | Check price on Amazon #ad We don’t show prices — check the current one on Amazon. How we’re funded |
| 2 | If you're replacing the panel | 100% Blackout Curtains with black liner Anyone starting fresh who would rather hang one thing than two. | Lined blackout curtain | Machine wash cold | Check price on Amazon #ad We don’t show prices — check the current one on Amazon. How we’re funded |
| 3 | If you want the lightest option | Thermal Insulated Blackout Curtains Marginal rods and wide spans, where doubling the weight is the thing to avoid. | Blackout curtain | Machine wash cold | Check price on Amazon #ad We don’t show prices — check the current one on Amazon. How we’re funded |
01 — If you're adding a liner
Blackout Curtain Liners with detachable rings
NICETOWN
Blackout liners on rings that snap open, so they go onto an existing rod behind curtains you already own without taking anything down.
Who it’s for: Curtains you already like, and renters who would rather not replace the landlord's fittings.
The catch: A liner inherits your curtains' coverage. If they are narrower or shorter than the window, the liner will be too, and the gaps stay exactly where they were.
At a glance
- Type
- Blackout liner
- Construction
- Woven blackout
- Care
- Machine wash cold
- Attachment
- Detachable snap rings
#ad We don’t show prices — check the current one on Amazon. How we’re funded
02 — If you're replacing the panel
100% Blackout Curtains with black liner
Deconovo
A decorative face fabric with a black liner sewn behind it, so the liner does the light blocking and the room-side color can be anything you like.
Who it’s for: Anyone starting fresh who would rather hang one thing than two.
The catch: Two bonded layers make it bulky. It stacks wide when open, so it needs wall space beside the window and a rod with a center support on a wide span.
At a glance
- Type
- Lined blackout curtain
- Construction
- Face fabric + sewn liner
- Care
- Machine wash cold
- Drops
- 63 / 72 / 84 / 96 in
#ad We don’t show prices — check the current one on Amazon. How we’re funded
03 — If you want the lightest option
Thermal Insulated Blackout Curtains
NICETOWN
Triple-weave polyester with no coating to crack or peel, machine washable, and sold in a wider ladder of drops than most ranges — including the 108-inch length a near-ceiling rod needs.
Who it’s for: Marginal rods and wide spans, where doubling the weight is the thing to avoid.
The catch: The grommet header holds the panel an inch off the wall with open gaps between grommets, so light still comes over the top. Add a pelmet, or choose a back-tab version, if that is your problem.
At a glance
- Type
- Blackout curtain
- Construction
- Triple-weave, uncoated
- Care
- Machine wash cold
- Drops
- 63 / 84 / 96 / 108 in
#ad We don’t show prices — check the current one on Amazon. How we’re funded
FAQ
Questions people actually ask
Is a blackout liner as good as a blackout curtain?
Through the fabric, effectively yes — a liner is the same class of material. What it cannot do is change your curtains' width or length, so any light coming around the edges stays exactly as it was.
Can I add a liner to any curtain?
Almost any. Ring-on liners clip onto the rod behind grommet and rod-pocket curtains; hook-on liners suit pleated and tab-top headers where there is no rod space left. The main limit is rod space, not curtain type.
Which is cheaper?
A liner, usually — you are buying plain fabric rather than a finished decorative panel, and you keep the curtains you already paid for. The hidden cost is the rod, which may need a center support once the weight doubles.
Do liners look bad from outside?
They look like white or off-white fabric at the window, which is what most neighbourhoods look like anyway — and it is more uniform than a mix of curtain colors facing the street. From inside, a correctly sized liner is invisible.
Can I use a liner with sheer curtains?
Yes, and it is one of the best uses for one. Ring-on liners let you have sheers during the day and clip the blackout layer in at night, on a single rod.
Keep going
Read next
Blackout
Best blackout curtain liners
Add darkness behind curtains you already like, without replacing anything.
Blackout
Best blackout curtains for a room that's too bright
Panels that block light, plus the mounting rule that decides whether any of them works.
Blackout
How to fix curtain light gaps
Close the side, top, middle and bottom gaps — the cheapest fix for a bright room.
Renter-Friendly
Window treatments for renters
Everything that works without a drill, organized by the problem you're solving.
Glare
Best sheer curtains
Diffuse harsh daylight without darkening the room — plus the width rule sheers really depend on.
About the author
Janet H.
Janet H. is the owner of Janet Media Group and the person behind Drape & Dawn. She researches every pick against the site's published methodology.
Published by Janet Media Group · Last updated September 23, 2026