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Best roller shutter box insulation in this set

Updated: 22 October 2026

A cold band above the window, where a built-in roller shutter box meets the room, is a familiar winter complaint in UK houses that still have an empty box. You want the best roller shutter box insulation among the three amazon.co.uk listings in this set, or a plain reason to buy none of them. Peter F. compared a 3 mm roll, a 13 mm mat and a pair of side panels from the saved extract, with no lab test. A qualifying purchase can earn a commission at no extra cost to you. The table is on the [roller shutter insulation comparison](/hub/heating/roller-shutter-insulation).

A cold band above the window, where a built-in roller shutter box meets the room, is a familiar winter complaint in UK houses that still have an empty box.

Our top picks

Schellenberg Schellenberg 66267

Best overall

Schellenberg Schellenberg 66267
8.6/10about £17.28
View offer
Schellenberg Schellenberg 66257

Rank 2

Schellenberg Schellenberg 66257
8.4/10about £35.61
View offer
Schellenberg Schellenberg 66272

Best value

Schellenberg Schellenberg 66272
8.2/10about £4.45
View offer
On this page
  1. 1.Best for a tight uninsulated box in this set
  2. 2.When the 13 mm mat is the better row
  3. 3.When the side panels are the right spend
  4. 4.What this best does not mean

Best for a tight uninsulated box in this set

If the shutter is fully raised and only a few millimetres remain under the lid, the top pick is the Schellenberg 3 mm rolls (ASIN B01M12RO34): £17.28, 4.2 from 343 reviews, listed as 3 mm with a WLG 035 bullet. That 035 is the UK bullet, not a value we measured. The title also prints 66258, so match the ASIN. These rolls are the top pick only while the gap stays too tight for a thicker board. Skip them when the cold spot is the plastered ends. Do not treat 343 ratings as a UK household survey. Much of the text is not British English.

When the 13 mm mat is the better row

Choose the 13 mm mat (ASIN B006JJ3E4A) when 13 mm will sit clear of the curtain on the long inner face. The saved price is £35.61, with 4.1 from 31 reviews, and this row has no badge. You pay roughly twice the 3 mm rolls for more than four times the thickness. Thirty-one reviews can swing on a few comments. Where you can still pass a finger between the raised curtain and the lid, the mat is the better row. If the curtain already brushes the lid, this board will meet the slats. How WLG compares with millimetres stays on the roller shutter insulation buying guide.
Schellenberg Schellenberg 66267

Testsieger

Schellenberg Schellenberg 66267
8.6/10about £17.28
View offer

When the side panels are the right spend

Best value on Schellenberg 66272 (ASIN B006JJDVNY) means the lowest shelf price, not a complete lining: £4.45, 4.0 from 214 reviews, two boards. Schellenberg calls 66272 a supplement to a mat, at WLG 031, and the amazon.co.uk text repeats that. WLG 031 still leaves a bare lid cold. A claim of up to 60% is a marketing bullet, not a test in these sources. Buy the pair when the long face is already lined. Coverage is on the mat versus side panels page.

What this best does not mean

Best here means the most suitable of these three amazon.co.uk listings for the face you are lining. Sort by stars and the £17.28 rolls come first. Sort by thickness and the £35.61 mat comes first. Sort by price and the £4.45 cheeks come first. Model 66256, a 25 mm mat around £30.30 at Mercateo, is a trade price and not a row here. An Amig 5 mm roll on amazon.co.uk is not ranked. If the lid will not unscrew, a motor fills the box, or none of these thicknesses fit, buy none of them.

Common questions

Which of these three should I buy for a cold lid?
For a cold lid with only a few millimetres spare once the curtain is raised, buy the 3 mm rolls, ASIN B01M12RO34, at £17.28 in the saved extract. For a cold lid that still has room for 13 mm without rubbing, buy the mat, ASIN B006JJ3E4A, at £35.61. The £4.45 side panels, ASIN B006JJDVNY, do not line the lid. Schellenberg describes them as a supplement.
Who should skip the 3 mm rolls?
Skip the 3 mm rolls if the 13 mm mat will fit without rubbing the curtain. You would be choosing the thinner lining mainly for a 4.2 rating from 343 reviews. Skip them as well if you only need the two cheeks. They quote WLG 035 on the UK bullet, which does not make them end panels. They stay the top pick only when the gap is too tight for 13 mm and the lid is the face you are covering.
Who should skip the side panels?
Skip Schellenberg 66272 if the lid or the long inner face is still bare. Two boards at £4.45 cover the cheeks, and the amazon.co.uk text calls them a supplement to a mat. They are also the wrong parcel if a photo led you to expect a full kit. Buy them when a lining is already on the long face and the remaining cold spot is at the ends.
Why is the cheap pair called best value if it does not line the lid?
In this set, best value means the lowest shelf price for an insulation piece: £4.45 for the two side panels, rated 4.0 from 214 reviews. It does not mean the cheapest way to deal with a cold lid. Those panels leave the lid untouched. If you need that face covered, the £17.28 rolls or the £35.61 mat are the prices that apply.
Can I trust 343 reviews on the 3 mm rolls?
You can treat 4.2 from 343 as a sign that many shoppers have bought that amazon.co.uk listing. You should not read it as a survey of UK homes. Much of the review text is not British English, so it is a weak guide to British boxes and winters. The 13 mm mat has 31 reviews at 4.1. Neither figure is a laboratory result from this comparison.
What if none of them fit the gap I measured?
Buy none of the three. A 13 mm mat that rubs the raised curtain, a 3 mm roll on a lid you cannot open, or side panels when you needed the long face, leave the box cold and add a return. Measure the spare gap with the shutter fully raised before you order. If you find a motor, a stuck lid, or a gap that matches none of these thicknesses, sort access before you buy a lining.

Related pages

How to insulate a roller shutter box

Insulation for a narrow roller shutter box

Roller shutter insulation

Roller shutter insulation: thickness, faces, fixing

Roller shutter side panels vs insulation mat sizes

Sources

Public UK and manufacturer sources named below. amazon.co.uk prices, stars and review counts are from the saved extracts for B01M12RO34, B006JJ3E4A and B006JJDVNY. Page updated October 2026. This is not a lab test.

  1. Approved Document L, Volume 1 (2021, 2023 amendments) (retrieved 21 October 2026)
  2. Energy Saving Trust — draught proofing (retrieved 21 October 2026)
  3. Passipedia — insulating roller shutter boxes (retrieved 21 October 2026)
  4. Schellenberg 66272 side panels (retrieved 21 October 2026)
  5. Schellenberg 66257 shop page (retrieved 21 October 2026)
  6. Fire Protection Association — cavity barriers (retrieved 21 October 2026)
  7. amazon.co.uk — Schellenberg 66267 (retrieved 21 October 2026)
  8. French 66267 page noting WLG 033 (retrieved 21 October 2026)