The best polystyrene sheets, compared.
Top pick: Triplast EPS 70, 12 sheets 1200 x 600 x 25 mm – Score 86, tied, and the most 25 mm area in this set at 8.64 m², about £47.79. The 345 reviews are a shared pool. Best value: Triplast EPS 70, 10 sheets 600 x 400 x 10 mm – About £16.89, the lowest price among the EPS packs, score 86. It is 10 mm, for a thin lining or a packer. Updated 23 October 2026.
Polystyrene sheets are flat boards you buy in the UK to line a shed, pack a fragile panel, mount a photo, carve a model or press a block print. The name covers four things: expanded polystyrene bead board, extruded polystyrene, paper-faced foam board with a polystyrene core, and a thin print sheet. Listings often say polystyrene while a bullet says EVA or PVC, and those foams are a different buy. For bare insulation board, the useful label is the BS EN 13163 grade. EPS 70 means a declared compressive stress of 70 kPa at 10 per cent deformation. Thickness and U-value are separate figures. White bead board is mostly air. It sheds beads when cut, melts under solvent glue, and ordinary grades are combustible. Mounting wants about 5 mm of paper-faced board. A shed stud is often planned around 50 mm with a gap, or less if the frame is shallower. Measure one sheet before you trust the size line. Polymer, face and thickness are set out in the [polystyrene sheets buying guide](/hub/diy-supplies/polystyrene-sheets/sub/polystyrene-sheets-buying-guide).
Polystyrene sheets are flat boards you buy in the UK to line a shed, pack a fragile panel, mount a photo, carve a model or press a block print.
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Personal buying guide
Question 1 of 2
What are you buying it for?
The Triplast 12-pack is twelve UK-made EPS 70 sheets at 1200 x 600 x 25 mm, covering 8.64 m², listed at about £47.79. The amazon.co.uk line is 4.6 from 345 reviews, and the same star line and the same review text sit on two other Triplast sizes in this set, so that figure is one pool rather than a test of this pack alone. Reviewers in the pool use the white sheets on a garden house, a shed and similar lining jobs, and they also say the cut is messy, with bits coming off. One comment in that pool says the white sheet is not like dense blue or pink foam. The bullet claims BBA certification for BS EN 13163:2012 and does not print a certificate number, and the lambda line is a range, 0.038–0.030 W/mK, on sheets described as white. At 25 mm this is the largest area of that thickness in the set, which is why it is the top pick, and it is still thinner than the 50 mm example used in shed guides. Shared comments also mention damaged outer sheets, so the first and last board in the parcel are the ones to check.
Pros
Cons
Best for: You want the most 25 mm EPS area in this set for a lining or packaging job you can cut down.
Less suitable: You need a stated U-value, a floor-grade board, or a review count that belongs only to this size.
Specifications
Common questions
Does the listing give a BBA certificate number?
No. The bullet says BBA certified for BS EN 13163:2012. No certificate number is printed.
Are the 345 reviews only about this 1200 x 600 mm pack?
No. The same 4.6 from 345 and the same review text sit on two other Triplast ASINs in this set. One review describes a larger 12-sheet size.
Does the page give a sound figure?
It asks about soundproofing. The bullets do not give a decibel figure. There is no sound reduction to quote.
Ten Triplast EPS 70 sheets at 600 x 400 x 10 mm are the lowest Triplast price on the stored listing, about £16.89, at a stated weight of 420 g. A later note on the same pack showed about £14.34. The star line is the same 4.6 from 345 as the 25 mm packs, so a comment in that pool about a very thin sheet is not a measurement of this thickness alone. The coverage line says 2.58 square feet, while ten sheets at 600 x 400 mm are 2.4 m², and those units do not match. It is bead EPS, listed as made in the United Kingdom, with the same BBA claim and no certificate number. At 10 mm it suits a thin lining, a packer or a craft offcut, and it is not the 50 mm thickness used as a shed-stud example. The best value mark is that pack price among the EPS rows, not a separate star score.
Pros
Cons
Best for: You want a small, low-priced pack of real EPS for packing or a thin lining.
Less suitable: You are buying thickness for a summerhouse wall, or you need the coverage figure to add up.
Specifications
Common questions
Is 10 mm the same star rating as the 25 mm packs?
The listing shows the same 4.6 from 345. Treat it as one pool. A comment about a very thin sheet is not a measurement of this ASIN alone.
What is wrong with the coverage line?
It says 2.58 square feet. Ten sheets at 600 x 400 mm are 2.4 m². The units do not match.
Is this the cheapest EPS pack in the set?
Yes, at about £16.89 on the stored listing. It is also the thinnest Triplast pack here. A later note showed about £14.34. A craft pack is cheaper and is not an EPS 70 pack.
Twenty-five Triplast EPS 70 sheets at 600 x 400 x 25 mm are listed at about £37.49, with a stated weight of 3 kg. The amazon.co.uk line is again 4.6 from 345, and the listing carries the same review text as the larger 12-pack. One review title inside that text names this 25-sheet size, which is the only size-specific marker in the pool. The coverage field is a phrase about thermal insulation and protective packaging, not an area you can add up. The same BBA claim appears without a certificate number, and the lambda bullet is the same 0.038–0.030 W/mK range on white sheet. Each piece is 25 mm thick, matching the thicker Triplast rows here, but the plan size is smaller than 1200 x 600 mm, so a long run means more joints. No fire class is stated, and the long bullet still mentions ceiling tiles.
Pros
Cons
Best for: You want 25 mm EPS in smaller pieces and you can accept extra joints.
Less suitable: You need a stated coverage in square metres, or you are reading the stars as unique to this ASIN.
Specifications
Common questions
Is this pack the same reviews as the larger Triplast sheets?
The listing carries the same 4.6 from 345 and the same review text. One title inside that text names this 25-sheet size. Other reviews name other sizes.
What area does the coverage line give?
It does not give a number. The field reads as thermal insulation coverage and protective packaging coverage, not a square-metre figure.
Is a fire class stated?
No Euroclass is on the listing. The long bullet still mentions ceiling tiles.
The WYIPOLZI pack is sixteen A3 boards, 297 x 420 mm, at 5 mm, listed at about £14.99 and made in China. It shows 4.6 from 3 amazon.co.uk ratings, with two written reviews on the listing. A UK review says the polystyrene is the core and the face is a smooth paper, which matches the bullet about a thin paper outer. That review also says the glue bonds at once, and lifting a print tears the face paper. At a stated 530 g for sixteen sheets it is a mounting and model board, and 5 mm will not fill a shed stud. Three ratings cannot show how often the face tears. The title says polystyrene, and the surface you draw on is paper.
Pros
Cons
Best for: You are mounting a print or building a small model and you can place the glue in one pass.
Less suitable: You need bare foam to carve, or a board that will sit outdoors.
Specifications
Common questions
Is the white face polystyrene?
A UK review says polystyrene is the core and the face is a smooth paper. The bullet says a thin paper outer.
Can you reposition a glued print?
That review says the glue bonds at once and lifting it tears the face paper.
Will this fill a shed stud?
It is 5 mm foam board for crafts and mounting, not an insulation pack.
The SuQurtom five-pack is listed at about £12.59, with a title that says 30 x 20 x 2 cm and a spec line that says 6 x 4 cm. A UK reviewer measured 28.9 cm by 20 cm by 2 cm, about a centimetre short of the title length, and another review notes dents and rolled corners. One review says the outer pieces are only good on one side. The listing shows 4.4 from 3 ratings, and the stated weight is 190 g. One bullet says a closed-cell XPS structure, the material field says polystyrene, and there is no grade in kPa, so the XPS wording is a claim rather than a floor specification. The spec line also calls the colour blue. At the measured size it is a small sculpture block if that is the piece you wanted, and it is not a substitute for a merchant XPS board.
Pros
Cons
Best for: You want a small carving block and you will measure it before you commit a design.
Less suitable: You need a specified floor board, or you are treating the 6 x 4 cm spec line as the size.
Specifications
Common questions
How big are the boards?
The title says 30 x 20 x 2 cm. The spec line says 6 x 4 cm. A UK reviewer measured 28.9 cm by 20 cm by 2 cm.
Does the listing say XPS?
One bullet says a closed-cell XPS structure. The material field says polystyrene. There is no grade in kPa.
How did they arrive?
One review says outer pieces are only good on one side. Another notes dents, rolled corners, and a length about 1 cm short.
Major Brushes Safeprint is fifty polystyrene sheets at 16.5 cm square, listed at about £17.99, with a stated weight of 250 g. Thickness is not stated on this amazon.co.uk listing. The bullets describe a block-printing plate you impress with a blunt tool, and a sheet you can cut with a knife or scissors for model making. The star line is 4.1 from 10 reviews, and only one of those reviews has text on the listing: a UK note from 31 December 2025 that calls them good value for miniatures. The other nine ratings have no text, so the 4.1 rests on a thin written sample. Non-toxic appears as a question on the listing, not as a test result. At 16.5 cm a side, the sheet is a printing plate or a miniature blank, not a wall board.
Pros
Cons
Best for: You are printing a small block or cutting miniature pieces and you do not need a stated thickness.
Less suitable: You want a measured insulation board, or you are reading ten stars as ten written tests.
Specifications
Common questions
What are these sheets for?
The bullets say a block-printing plate you can impress with a blunt tool, and model making cut with a knife or scissors.
How thick are they?
Thickness is not stated on this amazon.co.uk listing. A maker’s usual print-sheet range is about 3 mm, and that figure is not printed here.
What do the written reviews say?
One UK review, dated 31 December 2025, says they are good value for miniatures. The other nine ratings have no text on the listing. The star line is 4.1 from 10.
Shelf prices, stars and review notes are the amazon.co.uk listings stored for these six products. Each score starts at the star rating multiplied by 20, so 4.6 starts at 92, 4.4 at 88 and 4.1 at 82. Then three fixed deductions apply: 8 points when the rating count is under 10, 6 points when the written reviews are one pool copied across ASINs, and 4 points when the title, the spec line and a measured review disagree on size. The criteria below are those steps, and their weights sum to 100. The number on each product is the score after deductions. U-value, fire class and compressive strength were not measured in a lab. Three packs tie on 86. The top pick is the one with the most 25 mm area. Best value is the lowest price among the EPS packs.
Star line
82%The amazon.co.uk star rating is multiplied by 20. A 4.6 starts at 92, a 4.4 at 88 and a 4.1 at 82. That start is the bulk of the score. It is the stored star line, and there is no separate lab mark.
Thin review count
8%Take off 8 points when the rating count is under 10. The A3 foam board and the five-board pack have 3 ratings, so both lose 8. The print sheets have 10 ratings, so this deduction does not apply. One written review inside a count of 10 stays a thin sample in the text.
Shared review pool
6%Take off 6 points when the written reviews are one pool copied across ASINs. All three EPS 70 packs lose those 6 points. The same 4.6 from 345 is one pool, including comments about other sizes.
Size agreement
4%Take off 4 points when the title, the spec line and a measured review disagree on size. The five-board pack loses those 4 points. The other five listings do not.
You are choosing a sheet, and the word polystyrene covers more than one product. The six amazon.co.uk listings here run from about £12.59 to about £47.79. Three are EPS 70 packs that share one star line. The others are paper-faced foam board, a print sheet, and a small block whose size lines disagree. The top pick is the 12-sheet 25 mm pack when you want the most area of that thickness. Best value is the 10 mm EPS pack, the lowest price among those EPS rows, and it is thin.
A polystyrene sheet in a UK shop is one of four products. Expanded polystyrene is fused beads, about 98 per cent air, and it is used for packaging and insulation. Extruded polystyrene is finer and closed-cell, often blue, pink or grey, denser, and the better choice in the wet or where you want a carved edge. Foam board is paper or card on a thin core. It is a mounting sheet, not a cavity fill. A print sheet is a soft plate you impress with a blunt tool. PIR is a different insulation board.
Listings often say polystyrene while a bullet says EVA or PVC. Those foams are a different buy. Keep EPS, XPS, paper over a polystyrene core, or a polystyrene print sheet.
The three Triplast packs copy the same 4.6 from 345 and the same review text, including comments about other sizes. One pool is one pool.
A published shed example uses 50 mm in a 75 mm stud with a gap. The EPS packs here are 10 mm and 25 mm. A lower price on the thin pack is less thickness, not cheaper insulation.
Start with the material line. EPS is bead board for packing and dry lining. XPS is the closed-cell board for damp or a fine carved edge. Foam board is paper on a thin core. A print sheet takes an impression. PIR is a different board. Bead board and extruded board are compared in [EPS or XPS](/hub/diy-supplies/polystyrene-sheets/sub/polystyrene-sheets-eps-or-xps). EPS 70 means 70 kPa at 10 per cent deformation.
Thickness follows the job. Mounting wants about 5 mm of foam board. A print sheet in a maker’s usual range is about 3 mm, and the print pack here does not state thickness. Shed lining in a published example is 50 mm in a 75 mm stud with a gap, or less where the stud is shallower. The EPS packs here are 10 mm and 25 mm. Measure one sheet. One craft listing says 30 × 20 cm in the title, 6 × 4 cm on the spec line, and a reviewer measured about 28.9 × 20 × 2 cm.
Three typical situations, each with a recommendation from this comparison.
You want white EPS for a shed or summerhouse lining, and you know 25 mm is short of a 50 mm stud fill. The top pick is the Triplast 12-pack at about £47.79, 1200 × 600 × 25 mm, 8.64 m², score 86. The 4.6 from 345 is a shared pool. If the shed has mains power, do not line it with polystyrene.
You are mounting a photo or building a small model, and you can place the glue in one pass. The WYIPOLZI pack is sixteen A3 boards at 5 mm, about £14.99, with 4.6 from 3 ratings. A UK review says the face is paper and that lifting a print tears it. It will not fill a stud.
You want a low-priced pack of real EPS for packing or a thin lining. Best value is ten Triplast sheets at 10 mm, about £16.89, score 86. The coverage units do not match the stated size. It is the wrong buy if the frame was planned around a thicker board.
The top pick is the Triplast 12-pack of EPS 70 sheets, 1200 × 600 × 25 mm, at about £47.79. It scores 86, tied with two other EPS packs. The tie-break is area: 8.64 m², the most 25 mm sheet in this set. The 4.6 from 345 reviews is one shared pool. No BBA certificate number is printed, and the lambda line is a range, 0.038–0.030 W/mK. It is the top pick in this set for lining or packing you can cut down, and 25 mm is thinner than a 50 mm shed-stud example. Best value is the Triplast 10-pack, 600 × 400 × 10 mm, at about £16.89, also score 86, because that is the lowest price among the EPS packs. The coverage line on that pack does not match the stated size. A five-board craft pack is cheaper and is a different product.
Triplast EPS 70, 12 sheets 1200 x 600 x 25 mm
Score 86, tied, and the most 25 mm area in this set at 8.64 m², about £47.79. The 345 reviews are a shared pool.
Triplast EPS 70, 10 sheets 600 x 400 x 10 mm
About £16.89, the lowest price among the EPS packs, score 86. It is 10 mm, for a thin lining or a packer.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources and the amazon.co.uk listings compared on this page. Updated 23 October 2026.
This page contains affiliate links to amazon.co.uk (tag pcuk26-21). If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are the amazon.co.uk figures stored for this set. U-value, fire class and compressive strength were not measured in a lab.
