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Soundproof - Window Curtain | ✅ Lab Certified | Reduces Outside Noise | Thermal | FR.

Flame Retardant Flame Retardant
Blackout Blackout
Made To Measure Made To Measure
British Made British Made
Acoustic Acoustic
5 Year Guarantee 5 Year Guarantee
Thermal Thermal
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Estimated Delivery

Currently 3-4 Weeks - UK Manufactured

UK Mainland £5.99

UK Mainland Over £250

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✓ Best Seller ✓ Lab Certified ✓ UK Made 🚚 3-4 Weeks Delivery

Sound Reducing Curtains for Windows

Designed to reduce external noise through the window and calm the room by reducing echo. Lab tested, British made, fire retardant as standard.

★★★★★ 4.9 from 2,306 verified Trustpilot reviews

Voice frequencies

Up to +12 dB

where you hear noise most

Curtain SRI

11 dB

room divider test

Absorption

Grade A

EN ISO 354

Thermal

30%

heat loss reduction

Will it work for my situation?

Pick the closest match. This keeps expectations realistic.

Traffic noise, voices, general outside noise

Good results when the curtain overlaps the window and you reduce drafts.

Bedroom sleep upgrade

Strong choice — noise reduction plus blackout plus thermal benefit in one curtain.

Aircraft noise

Often helpful, but results depend heavily on window quality and sealing.

Very low frequency bass or vibration

Curtains help, but building structure matters. Consider sealing upgrades alongside.

Straight talk: your window is the main barrier. The curtain is a proven upgrade, not a replacement for poor glazing.

What you get

Sound reducing curtains

Sound reduction

+4 dB over double glazing. 11 dB SRI as room divider.

Blackout curtains

True blackout

3-pass coated lining blocks light in and out.

Thermal curtains

Thermally certified

Reduces heat loss by 30% over double glazing.

Fabric weight

Premium construction

360 gsm face + 370 gsm lining. Over 1 kg per m².

🔥

Fire retardant

BS5867 Part 2C face fabric. Part 2B lining.

Colour availability

If a colour cannot be selected it is out of stock. Contact the team for lead time.

Getting the Best Results

Fitting makes the difference

These 3 rules are where most performance is won or lost.

Aim: higher + wider + floor length

1) Fit higher

Mount 15 to 20 cm above the window, or ceiling fit where possible.

Track above window

2) Go wider

Overlap the window edges by 20 to 30 cm each side.

Overlap reduces edge leakage

3) Seal drafts first

Air gaps are sound gaps. Improving seals delivers better results.

Drafts reduce performance

Our own test result

Fitting the curtain 30 cm wider than the window and making it floor length produced the +4 dB improvement shown in our certificates. Fitting tight to the frame produces a lower result.

About "up to 21 dB" claims

Some suppliers quote peak figures at very high frequencies (4,000+ Hz) where any dense fabric performs well. Our published results focus on realistic performance across the full frequency range.

You will also need a suitable track

Acoustic curtains are heavy — over 1 kg per m². Standard plastic tracks and lightweight poles are not suitable.

Contract Heavy Duty Curtain Track

Contract Heavy Duty Curtain Track

Metal heavy-duty track rated to 60 kg. Black or white. Wave compatible. The recommended track for our full acoustic range.

  • ✓ Rated to 60 kg load
  • ✓ Wave, eyelet and pencil pleat compatible
  • ✓ Black or white finish
  • ✓ Made to measure
View Track →

Proof and testing

We publish our certificates. Most competitors do not test at all.

Window test: 29 dB baseline → 33 dB with curtain (+4 dB)

Curtain installed on track over window
Acoustic testing in a laboratory

What the window test means

  • Double glazing alone measures 29 dB
  • Our curtain takes it to 33 dB (+4 dB improvement)
  • Room divider SRI is 11 dB — curtain tested in isolation with no window
  • Fitting height and overlap affect real-world results

Absorption result (face fabric)

Sound absorption test results

Insulation result (2 layers)

Acoustic insulation results 2 layers

Insulation result (3 layers)

Acoustic insulation results 3 layers

Window only (29 dB baseline)

Double glazed window tested

Window + curtain 2 layers (33 dB, +4 dB)

Window with curtain tested

How we tested — and what it means at the frequencies that matter

Real-world mounting. Published certificates. Honest frequency breakdown.

How this test was conducted

Most acoustic lab tests mount material in a rigid sealed frame. Our curtains were tested mounted on a standard curtain rail in a normal domestic setup — the same way you would fit them at home. The test accounts for real edge gaps, real drape behaviour and a real installation method.

Getting +4 dB in a realistic mounted test is a more meaningful result than a higher figure from a sealed frame that no real installation would replicate.

Why the weighted average undersells performance

The Rw weighted figure of +4 dB is an average across all frequencies including the low bass range (below 200 Hz) where curtains — like all soft furnishings — have limited effect. At the frequencies human hearing is most sensitive to, the improvement is substantially higher.

Across the 630 Hz to 2,000 Hz range — where voices, traffic and most everyday noise sits — our curtain adds an average of 8 dB over the window alone.

Frequency by frequency — window baseline vs window with curtain

Tested on standard curtain rail. Published certificate. Direct Fabrics lab test.

Hz
What you hear
Window only
With curtain
Improvement
63 Hz
Deep bass rumble
20.9 dB
19.7 dB
Minimal
125 Hz
Low traffic rumble
19.1 dB
18.6 dB
Minimal
250 Hz
Bass — engines, HGVs
17.5 dB
19.7 dB
+2.2 dB
500 Hz
Voices — low register
33.3 dB
29.6 dB
Test anomaly
800 Hz
Traffic, voices, TV
33.3 dB
41.7 dB
+8.4 dB
1,000 Hz
Speech — most audible
35.4 dB
41.7 dB
+6.3 dB
1,250 Hz
Peak human sensitivity
35.4 dB
47.6 dB
+12.2 dB
1,600 Hz
Voices, alarms, birdsong
41.4 dB
50.0 dB
+8.6 dB
2,000 Hz
High voices, car horns
38.4 dB
50.0 dB
+11.6 dB
2,500 Hz
Higher frequency traffic
38.5 dB
46.9 dB
+8.4 dB
4,000 Hz
High-pitch sounds
38.4 dB
43.0 dB
+4.6 dB

+4 dB

Weighted average (Rw)
across all frequencies

+8 dB

Average improvement at
630 Hz to 2,000 Hz

Where human hearing is most sensitive

+12 dB

Peak improvement at
1,250 Hz

The frequency range of speech and voices

Why does the weighted Rw show only +4 dB? The weighted figure follows a standardised calculation that includes low bass frequencies (below 200 Hz) where the window itself already provides good isolation and curtains add little. This pulls the average down significantly. The frequencies where the curtain makes the most difference — the mid-range where you actually hear noise — are not fully reflected in a single weighted number.

See it in Action

Watch before you buy

Real demonstrations and lab test explanations.

Acoustic Curtain Demonstration — Performance and Installation

Sound Absorption vs Insulation Explained

Lab Test Results — What the Numbers Mean

The face fabric

Herringbone acoustic fabric, 360 gsm. Designed to perform acoustically while looking like a premium curtain. Available in multiple colours and finishes.

Acoustic herringbone colour range

Fire retardant

Face fabric: BS5867 Part 2C. Lining: BS5867 Part 2B.

Absorption

EN ISO 354: Grade A, 0.95 aw — excellent echo reduction.

Wash care

30 degrees when blackout lined. Dry clean recommended for best results.

Want the full explainer?

Absorption vs insulation explained: read here.

Quick reference: a 10 dB change is commonly described as sounding roughly half as loud. Your result depends on the room, the window and how the curtain is fitted.

What customers say

Verified Trustpilot reviews with genuine install photos.

★★★★★ 4.9 2,306 reviews
T Thorpe acoustic curtain install 1 T Thorpe acoustic curtain install 2 T Thorpe acoustic curtain install 3 T Thorpe acoustic curtain install 4
★★★★★
"They deaden or muffle noise from the street outside very well - cars, people. If there is very loud music the bass still comes through but it is muffled. They make the room much more cosy and combined with the blackout they are excellent."
TT

T. Thorpe

✓ Verified Trustpilot Review

4 photos submitted

Sarah G soundproof curtain review
★★★★★

"The rest of the house is now bearable when the drum kit is being played. I can have a conversation which I could not before, and it is not impacting our neighbours any more."

SG

Sarah G.

✓ Verified

Adriane Colby soundproof curtains
★★★★★

"We love them! We were so pleased we ordered the exact same thing for our guest bedroom. Hoping to do a third order for our lounge!"

AC

Adriane C.

✓ Verified

Aman Kaur curtain review
★★★★★

"They are great quality curtains. They do reduce the noise. They keep the room warm which is great in colder months!"

AK

A. Kaur

✓ Verified

Real installs

Bedrooms, patio doors, lounges, studios and commercial spaces.

Bedroom sound reducing curtains
Bedroom
Patio door sound reducing curtains
Patio door
Lounge acoustic curtains
Lounge
Piano performance room acoustic curtains
Performance room
Airport noise bedroom curtains
Airport noise — bedroom
Large wall acoustic curtains
Large wall installation
Also in This Range

Looking for a different acoustic solution?

This curtain is optimised for windows. We also offer room dividers, echo reduction and specialist stage curtains.

View Full Acoustic Range →

Frequently asked questions

Will this stop road noise? ⌄
Often yes, to a noticeable degree, especially for mid and higher frequencies. In our own test the curtain added +4 dB over double glazing. The biggest factor is window sealing — if you can feel drafts, seal them first.
Will it help with aircraft noise? ⌄
It can help, but aircraft noise outcomes vary by window and building. Most customers notice improvements when the curtain is fitted higher and wider and used with the blackout lining.
Which track should I use? ⌄
Use a heavy-duty metal track. These curtains weigh over 1 kg per m² — standard plastic tracks and lightweight poles are not suitable. We recommend our Contract Heavy Duty Curtain Track, rated to 60 kg.
Room divider vs window curtain — what is the difference? ⌄
Same curtain system, tested in different scenarios. The room divider SRI of 11 dB is the curtain's own insulation value tested in isolation with no window involved. Over a double glazed window, our tested improvement is +4 dB, taking the window from 29 dB to 33 dB.
Will it be fully soundproof? ⌄
No. "Soundproof" is commonly used as a category term across the industry. These are sound reducing curtains with published lab results and strong real-world feedback. They will make a clearly noticeable difference — they will not eliminate sound completely.
Can I return made-to-measure curtains? ⌄
Made-to-measure curtains cannot be returned as they are manufactured specifically to your measurements. However, we stand by our quality. If there is a fault or issue with the product please contact our team directly and we will resolve it.
Washing / Cleaning Information Face Fabric 30 Degrees (When Blackout Lined)
Flame Retardant Certified Rating BS5867 Part 2B
Delivery Currently 3-4 Weeks - UK Manufactured
Flame Retardant Yes
Fabric Style Plains
Fabric Width (cm) 150
Pattern Repeat Vertical (cm) 1
Composition 100% Polyester
Features Flame Retardant, Blackout, Soundproof
5.0 (101)

Customer Product Reviews

5.0

101 reviews

81% of customers recommend this product

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Top customer reviews

  1. Great product & service

    Review

    Lovely selection of soundproofing curtains, great customer service and fast delivery. Recommend for personal and professional use!
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    0 people found this helpful
  2. Soundproofing - Window Curtain

    Review

    Testimonial
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    0 people found this helpful
  3. 100% satisfied

    Review

    100% satisfied, the quality of material for these Curtains from Direct Fabrics are lovely and made beautifully.. outstanding service and made within a few weeks *****
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    0 people found this helpful
  4. I was quoted a delivery time of 3-4…

    Review

    I was quoted a delivery time of 3-4 weeks but the order was delivered within 10 days. The colour is great and the curtains were easily hung by 1 person. The curtains shut out much of the light and some of the sound which helps with a good sleep. The only negative was the box the curtains were packed in was quite battered by the time it arrived and had been repaired by DPD but the curtains were undamaged.
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    2 people found this helpful
  5. Wow!

    Review

    Wow! I'm very impressed with the door curtain I ordered and hung it up straightaway. The curtain is beautifully made and the header tape was adjusted to fit the pole exact. The metal hooks were already inserted and there are weights stitched into the hem to help it hang perfectly. The fabric and lining are lovely and the curtain has noticeably reduced the echo and noise from the main road. A great purchase. Thank you!
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    2 people found this helpful
  6. Unbelievable service and great curtain

    Review

    Unbelievable service and great curtain, we used it for our conservatory to living room partition it creates great thermal insulation and keeps the cold out. It also looks great
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    2 people found this helpful
  7. Great customer service and bespoke…

    Review

    Great customer service and bespoke curtains.
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    3 people found this helpful
  8. Great product excellent quality

    Review

    Great product excellent quality
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    0 people found this helpful
  9. Room Divider Double Sided Curtain

    Review

    Very Happy with our room divider curtain, lovely quality and dress the divide very nicely.
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    0 people found this helpful
  10. Good experience

    Review

    Good experience, fast to reply and to adapt the product to my needs.
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    0 people found this helpful
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