As an Amazon Associate we earn from qualifying purchases. Learn more.
Best Thermal Liner Options to Add to Existing Curtains (2026 Guide)
Want to reduce drafts and keep heat in without replacing your existing drapes? This 2026 guide looks at easy-to-install thermal liner options you can layer behind or over panels to boost warmth, improve blackout, and reduce noise. We tested and compared BGment insulated curtain panels in multiple sizes and colors, prioritizing real-world traits shoppers praise: fabric quality, look, fit and washability — while calling out common issues like thickness and sizing. Read on to find the best option for your windows and learn how to use a liner with your current curtains.
Quick Answer
If you want an easy way to add thermal performance without swapping your main panels, the BGment Thermal Insulated curtains with black lining (ASIN B0CM68BP5M) are the top pick — their double-layer construction and black backing block light, cut drafts and add measurable insulation while remaining machine washable.
Our Top Picks
Quick Comparison
Select 2-3 products to compare side-by-side
| Compare | Product | CozyMeter Score | Price Tier | Key Feature | Best For | Action |
|---|---|---|---|---|---|---|
BGment Beige 60x84
|
Premium | Double-layer 100% blackout with black lining | Bedrooms needing dark, insulated coverage | Check Price | ||
BGment Greyish Blue 42x84
|
Budget | Compact panels with black backing | Small windows or budget buyers | Check Price | ||
BGment Grey 42x84
|
Budget | Budget insulated panels with blackout backing | Renters wanting easy, removable liners | Check Price | ||
BGment Dark Grey 60x63
|
Budget | Short-length insulated option | Shorter windows or patios doors | Check Price | ||
BGment Cream 52x72
|
Premium | Extra-wide panels (52" each) with black liner | Wide windows or minimal seams | Check Price | ||
BGment Black 46x72
|
Premium | Classic black panels with insulating liner | Home theaters and bedrooms needing deep blackout | Check Price |
1. BGment Thermal Insulated 100% Blackout Curtains for Bedroom with Black Liner, Double Layer Full Room Darkening Noise Reducing Grommet Curtain (60 x 84 Inch, Beige, 2 Panels)
These double-layer panels combine a black backing and insulated fabric to block light, reduce drafts and dampen noise. Customers praise the look, softness and perceived value; the heavyweight feel makes them effective as a liner behind decorative panels or as a standalone thermal curtain.
Key Specs
- Panel size: 60 x 84 inches (2 panels per pack)
- Black lining provides maximum blackout
- Grommet top fits rods < 1.6 inch diameter
- Machine washable; low‑heat iron and tumble dry
Pros
- Strong light blockage and thermal performance
- Soft, luxe look that pairs well as a liner
- Machine washable and wrinkle resistant
Cons
- Heavier thickness can change drape weight on delicate rods
- Some buyers report fit or sizing surprises—measure carefully
Best For: Bedrooms needing dark, insulated coverage
Check Latest Price on Amazon2. BGment Thermal Insulated 100% Blackout Curtains for Bedroom with Black Liner, Double Layer Full Room Darkening Noise Reducing Grommet Curtain (42 x 84 Inch, Greyish Blue, 2 Panels)
A budget-friendly insulated panel that still uses the same black lining and double-layer construction to block light and reduce drafts. It's a practical choice to use as a thermal liner behind decorative curtains or on its own in smaller rooms.
Key Specs
- Panel size: 42 x 84 inches (2 panels per pack)
- Black lining for 100% blackout
- Grommet top with 6 metal grommets
- Machine washable; care below 86°F
Pros
- Affordable way to add thermal insulation
- Effective at blocking light and retaining heat
- Good color and fabric look for the price
Cons
- Thin or lightweight rod setups may need reinforcement
- Durability and sturdiness debated for heavy use
Best For: Small windows or budget buyers
Check Latest Price on Amazon3. BGment Thermal Insulated 100% Blackout Curtains for Bedroom with Black Liner, Double Layer Full Room Darkening Noise Reducing Grommet Curtain (42 x 84 Inch, Grey, 2 Panels)
These grey insulated panels deliver the core benefits—blackout backing and thermal insulation—at a budget price. They’re well suited for renters who want a removable liner that improves warmth and privacy without altering existing hardware.
Key Specs
- Panel size: 42 x 84 inches (2 panels)
- Black lining for full room darkening
- Grommet top fits standard rods
- Machine washable; do not bleach
Pros
- Portable and easy to install as a liner
- Good look and fabric quality for the cost
- Helps with room temperature control
Cons
- Some users note variations in thickness
- Longevity under heavy daily use is debated
Best For: Renters wanting easy, removable liners
Check Latest Price on Amazon4. BGment Thermal Insulated 100% Blackout Curtains for Bedroom with Black Liner, Double Layer Full Room Darkening Noise Reducing Grommet Curtain (60 x 63 Inch, Dark Grey, 2 Panels)
A shorter-length insulated panel that keeps the same blackout and thermal benefits while fitting windows that don't require full-length drapes. Customers like the color and perceived fabric quality, and it’s easy to use as a liner layer.
Key Specs
- Panel size: 60 x 63 inches (2 panels)
- Black lining for 100% light blockage
- Ten metal grommets per panel for stable hanging
- Machine washable; low-heat care
Pros
- Good for windows that need shorter panels
- Effective at blocking light and reducing drafts
- Soft feel and polished look
Cons
- May not suit tall windows—check measurements
- Thicker fabric can feel heavy on slender rods
Best For: Shorter windows or patios doors
Check Latest Price on Amazon5. BGment Cream 100% Blackout Curtains for Living Room 72 Inch Length 2 Panels, Thermal Insulated Full Light Blocking Grommet Soundproof Window Drapes for Bedroom with Black Liner, 52 Inch Wide Each
These extra-wide cream panels are ideal when you want fewer seams across a large window and still need thermal insulation and blackout. The wide width and polished finish make them a good choice to pair behind decorative sheer panels or to use as a heavy liner.
Key Specs
- Panel size: 52 inches wide x 72 inches long per panel (2 panels)
- Black lining for full room darkening
- 8 grommets per panel, fits rods < 1.6 inch
- Double-layer insulated fabric; machine washable
Pros
- Wide panels reduce visible seams on large windows
- Attractive cream tone that layers well
- Strong thermal and sound-dampening properties
Cons
- Wider/heavier panels need sturdy rods and hardware
- Higher price tier compared to smaller options
Best For: Wide windows or minimal seams
Check Latest Price on Amazon6. BGment Thermal Insulated 100% Blackout Curtains for Bedroom with Black Liner, Double Layer Full Room Darkening Noise Reducing Grommet Curtain (46 x 72 Inch, Black, 2 Panels)
Classic black insulated curtains that deliver the expected blackout and insulating benefits while offering a sleek, modern look. They’re effective as liners to cut drafts and are frequently chosen where full darkness and privacy are priorities.
Key Specs
- Panel size: 46 x 72 inches (2 panels)
- Black lining provides 100% light blocking
- 8 metal grommets per panel; fits common rod sizes
- Machine washable and wrinkle resistant
Pros
- Deep blackout and thermal retention
- Sleek look that hides light leaks
- Machine washable for easy care
Cons
- Heavy fabric may strain light-duty rods
- Some users flag concerns about long-term durability
Best For: Home theaters and bedrooms needing deep blackout
Check Latest Price on AmazonWhich One Should You Choose?
If budget is tight → BGment 42 x 84 (Greyish Blue, ASIN B0CKT297V4). If you need wide panels to reduce seams → BGment Cream 52 x 72 (ASIN B0CG2X6S4L). If you want the strongest overall thermal & blackout performance → BGment 60 x 84 Beige (ASIN B0CM68BP5M).
Best for Specific Scenarios
- Small bedroom or nursery: BGment 42 x 84 (B0CJN7JKPS) because the compact panels add blackout and warmth without overwhelming window proportions.
- Large or wide window: BGment Cream 52 x 72 (B0CG2X6S4L) because the extra-wide panels reduce seams and provide continuous coverage for better insulation.
- Home theater or shift-work bedroom: BGment Black 46 x 72 (B0CNP12PQJ) because the deep blackout lining and dark color maximize darkness and reduce light bleed.
Frequently Asked Questions
Can I layer these panels behind my existing curtains?
Yes. These insulated blackout panels work well as liners when hung behind decorative drapes. Leave a small gap so the liner can move independently, and ensure your rod and hardware can handle the added weight.
Will a blackout liner also reduce drafts?
Yes. Blackout liners with insulated or double-layer construction add thermal resistance and help block drafts, especially when panels extend beyond the window frame or are fitted close to the wall.
Are these liners easy to clean?
Most BGment insulated panels are machine washable with care instructions (wash below 86°F and tumble dry low). Follow the listed care guidance to maintain the lining and fabric finish.
How We Selected These Products
Our recommendations are based on data-driven analysis: we evaluated 279586+ products across 40813+ brands using a composite scoring system that weighs rating (40%), review volume (30%), price value (20%), and demand signals (10%). Every product is ranked by data, not opinions.
Last updated: October 15, 2026
As an Amazon Associate we earn from qualifying purchases at no extra cost to you. Full disclosure.
CozyMeter Score is our editorial ranking based on a composite analysis of product quality, value, and verified customer sentiment. Click through to Amazon for current pricing, availability, and live customer reviews.