The best polycarbonate sheets, compared.
Top pick: Panda Ant 4 mm solid sheet – Highest score at 76: solid 4 mm, polycarbonate named, Exolon on the manufacturer field, and six reviews that describe a fit. Not a lab test. Best value: CHEOAR 4 mm twin-wall 10-pack – Value part 15, the highest among the rest: ten stated 4 mm twin-wall panels at about £61.99. Not a 10 mm canopy sheet. Updated 23 October 2026.
A polycarbonate sheet is a clear thermoplastic panel. In the UK you buy one when a pane must take a harder knock than glass or acrylic and, if the sheet is hollow, hold a little heat in the channels. Solid sheet looks like glass and does not insulate. Twin-wall and thicker multiwall diffuse light and slow heat loss. Corrugated single skin is light and has no flute to trap air. You tell a sound sheet by the structure and the thickness for the span, by a UV face marked on the protective film, and by end tapes if the sheet is hollow. Hobby greenhouses are usually glazed in 4 mm or 6 mm twin-wall. A short canopy steps up to about 10 mm, and longer roofs use 16 mm or more. Sheet around 1 mm is flexible, often stays curled, and is a poor shed window. Acrylic and fibreglass are different products even when the title says polycarbonate. How structure and thickness split is in the [polycarbonate sheet buying guide](/hub/diy-supplies/polycarbonate-sheet/sub/polycarbonate-sheet-buying-guide).
A polycarbonate sheet is a clear thermoplastic panel. In the UK you buy one when a pane must take a harder knock than glass or acrylic and, if the sheet is hollow, hold a little heat in the channels.
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Personal buying guide
Question 1 of 2
What are you covering?
The Panda Ant sheet is one solid clear pane, 610 mm by 457 mm by 4 mm, listed at 1.6 kg and £24.99 on amazon.co.uk. Six reviews sit at 5.0, and they praise strength, thickness, packaging, and a fit in place of broken greenhouse glass, including a report of two panels used that way. The material field says polycarbonate and the manufacturer field says Exolon, with Germany as the country of origin, which is more specific than a title that only says plastic. UV protection and high impact strength versus glass are listing claims, not a measurement in this comparison, and six reviews is a small sample. There is no stated temperature in the comparison fields, and a solid skin does not insulate the way twin-wall flutes do. It is the top pick here when the opening is about this glass size, and a poor match if you need several panels or a span this sheet cannot cover.
Pros
Cons
Best for: You are replacing one small greenhouse-glass pane and the opening is about 610 mm by 457 mm.
Less suitable: You need several twin-wall panels, a longer span, or a sheet that holds heat in flutes.
Specifications
Common questions
What size is the sheet?
610 mm by 457 mm by 4 mm, weight 1.6 kg, one sheet. The listing points it at greenhouse glass and shed windows. The shelf price on this capture is £24.99.
Who is named as the maker?
Brand Name is Panda Ant. Manufacturer is Exolon. Country of origin is Germany. The material field says polycarbonate.
Do the reviews mention a fault?
The six UK reviews praise strength, thickness, packaging, and a fit in place of broken greenhouse glass. They do not describe a defect. Six reviews is a small sample.
The CHEOAR pack is ten twin-wall panels of about 61 cm by 121 cm at 4 mm, listed at 5.72 kg and £61.99. The star line is 4.9 from 23 amazon.co.uk reviews, and reviewers describe an easy greenhouse fit and easy cutting, while one UK review says the sheet felt a bit thinner than expected even though the listing does state the thickness. The title says twin-wall and claims a UV coating, 99.9% UV blocking, and 89% light transmission. The item-form field says solid and the brand field says Generic, so those lines do not all agree, and the material field only says Plastic. Included components are listed as NO, so tapes and fixings are a separate buy. It is the best value here when you want several 4 mm twin-wall panels, and it is not a 10 mm canopy sheet.
Pros
Cons
Best for: You are glazing a hobby greenhouse or cold frame with several panels of about 61 cm by 121 cm.
Less suitable: You need one solid glass-like pane, a 6 mm or 10 mm sheet, or fixings in the same box.
Specifications
Common questions
Is this twin-wall or a solid sheet?
The title says twin-wall, 4 mm, about 61 cm by 121 cm, in a pack of 10. The item-form field says solid. Brand Name on the listing is Generic. Manufacturer is CHEOAR.
Are fixings in the box?
The included-components field says NO. Budget for tapes and fixings separately if you are glazing a frame. The shelf price on this capture is £61.99.
What do the reviews say about thickness?
One UK review says the sheet felt a bit thinner than expected, and notes that the listing does state the thickness. Other reviews describe an easy greenhouse fit and easy cutting. The star line is 4.9 from 23 reviews.
The SANJIAOJIA sheet is about 1 mm thick at a stated 1 m by 2 m, sold so it can roll, at £32.90. The star line is 4.2 from 70 amazon.co.uk reviews, and that review text is the same block as the 0.6 m listing, so it is not a second sample of 70. Reviews in the shared block say a rolled sheet would not flatten, and one reviewer found the screws named in the title nearly useless. A measured width of about 1 ft 11.6 in against a 2 ft description matches the other ASIN's 0.6 m width, not this 1 m title. The listing claims weather resistance, flexibility, and a temperature span of −40°C to 120°C, and the comparison fields carry no UV claim. About 1 mm is a flexible cover, and one shared review calls the material too thin for a shed window.
Pros
Cons
Best for: You want a thin flexible cover of about 2 square metres and you can accept curl.
Less suitable: You need a flat glazing pane, a shed window, or a greenhouse roof.
Specifications
Common questions
How thick is this sheet?
The bullets say about 1 mm. The title size is 1 m by 2 m. The scraped price is £32.90. There is no UV claim in the comparison fields.
Will it lie flat?
The bullets say it can be folded into a roll. Several reviews in this saved listing say a rolled sheet would not flatten. That review text is the same block as the 0.6 m listing.
Does the 2 ft width complaint apply here?
A review measured about 1 ft 11.6 in against a 2 ft description. That matches 0.6 m, which is the other ASIN, not this 1 m width. The title of this listing says 1 m by 2 m.
This SANJIAOJIA sheet is the smaller piece: a stated 0.6 m by 1 m, about 1 mm, at £15.90. It carries the same 4.2 from 70 amazon.co.uk reviews as the 1 m by 2 m listing, because the saved listings share one review block. One review measured about 1 ft 11.6 in against a 2 ft description, which lines up with this listing's stated width of about 0.6 m rather than the larger sheet. The same block reports curl, one reviewer says the sheet is too thin for a shed window, and another cut it with scissors and was not using it as glazing. The bullets say it can be rolled, cut, and bent, and the temperature line is again −40°C to 120°C as a listing claim, with no UV figure in the comparison. At £15.90 it is the lowest shelf price here, and it is still the wrong pane if the sheet has to lie flat at 4 mm.
Pros
Cons
Best for: You need a small flexible cover around 0.6 m by 1 m and curl is acceptable.
Less suitable: You are glazing a shed window, a greenhouse pane, or any opening that must stay flat.
Specifications
Common questions
What size is this sheet?
The title says 0.6 m by 1 m, also written as 2 ft by 3.3 ft, about 1 mm thick. The scraped price is £15.90.
Why do reviews mention a short 2 ft width?
One review says a sheet described as 2 ft wide measured about 1 ft 11.6 in. That is about 0.6 m, which is this listing's stated width. The same review text also appears on the 1 m by 2 m ASIN.
Is it thick enough for a shed window?
One review in the shared block says it is too thin for a shed window. Another reviewer cut it with scissors and was not using it as glazing. The sheet is about 1 mm.
Shelf prices, stars and review counts are the amazon.co.uk figures already stored for these four listings, captured on 19 October 2026. No sheet was lab-tested. Each score is out of 100 from four parts: stars, the review sample, fit as a glazing sheet in this set, and value in this set. It is not the star rating times 20. The highest total is the top pick, once. The highest value part among the rest is best value, once.
Stars
40%The amazon.co.uk rating is divided by 5, multiplied by 40, and rounded to the nearest integer. A 5.0 becomes 40, a 4.9 becomes 39, and a 4.2 becomes 34. Stars are not the whole score.
Review sample
20%1,000 or more reviews score 20, 500 to 999 score 16, 100 to 499 score 12, and 1 to 99 score 4. The two thin sheets share one review block, so neither receives a second sample bonus.
Fit as a glazing sheet
25%Solid 4 mm, with polycarbonate named, agreeing size fields and reviews that praise a greenhouse-glass fit, scores 23. The 4 mm twin-wall 10-pack scores 16. The larger thin sheet scores 10 and the smaller one scores 8.
Value in this set
15%Value is stated area and thickness at the shelf price, set against 4 mm twin-wall at £17.57 per square metre at The Polycarbonate Store. The 10-pack scores 15. The solid pane scores 9. The thin sheets score 7 and 6.
You are choosing a clear panel for a greenhouse, a shed opening or a short cover. The four amazon.co.uk listings captured on 19 October 2026 are not the same object: one solid 4 mm pane, a 10-pack of 4 mm twin-wall, and two flexible sheets of about 1 mm. Shelf prices run from about £15.90 to about £61.99. The top pick is the Panda Ant pane when the opening is about 610 mm by 457 mm. Best value is the CHEOAR pack when you want several twin-wall panels and you will buy tapes and fixings yourself.
A polycarbonate sheet is a clear thermoplastic panel: solid, twin-wall, thicker multiwall, or corrugated. UK buyers use it when a pane must take a harder knock than glass or acrylic and, if it is multiwall, hold a little heat in the channels. Solid sheet is one skin. It looks like glass and it does not insulate. Twin-wall and multiwall diffuse light and slow heat loss through the flutes. Corrugated single skin is light and has no insulation.
The title and the material line must say polycarbonate. Acrylic is a different plastic. A bullet that says fibreglass or resin is a different product. The CHEOAR material field only says Plastic, so the twin-wall title and that field do not agree.
The printed-film side of multiwall usually goes outside. Closed tape on the top, breather tape and a U-profile on the bottom, ribs down the slope. Leave about 3 mm of movement per metre, and do not clamp the fixing tight. Do not walk on the sheet.
Sheet around 1 mm is a flexible cover. Reviewers say it stays curled, and one calls it too thin for a shed window. 4 mm twin-wall is a hobby-greenhouse pane, not a conservatory roof. This set has no 10 mm or 16 mm sheet.
The title and the material line both have to say polycarbonate. Acrylic is a different plastic. A sheet whose bullets say fibreglass or resin is a different product, even if the title uses the word polycarbonate. Structure is the next split. Solid sheet is one skin. It looks like glass and it does not insulate. Twin-wall and thicker multiwall hold air in the channels, diffuse light, and slow heat loss. Corrugated single skin is light and has no insulation. Thickness follows the span.
Multiwall is usually UV-protected on the printed-film side only. That face goes outside. Hollow sheet needs closed tape on the top, breather tape and a U-profile on the bottom, ribs down the slope, and at least 5 degrees of fall. Leave the sheet room to move. Quinn's multiwall note is about 3 mm per metre. Brett Martin's Marlon ST note asks for an 18 mm hole, at least 40 mm from the edge, and not clamped tight. Do not walk on the sheet. Fixings are often a separate buy.
Three typical situations, each with a recommendation from this comparison.
You are replacing one small pane and the opening is about 610 mm by 457 mm. The Panda Ant solid 4 mm sheet is the top pick at about £24.99, with 5.0 from six reviews. Six reviews is a small sample. It does not insulate like twin-wall.
You are glazing a hobby greenhouse or cold frame with several panels of about 61 cm by 121 cm. The CHEOAR 4 mm twin-wall 10-pack is best value at about £61.99, with 4.9 from 23 reviews. Tapes and fixings are not in the box.
You only need a thin cover and you can accept curl. The smaller SANJIAOJIA sheet is about £15.90 at 0.6 m by 1 m. The larger one is about £32.90 at 1 m by 2 m. Both are about 1 mm, and the 4.2 from 70 reviews is one shared block. Skip both if the pane must lie flat.
The top pick is the Panda Ant solid 4 mm sheet at about £24.99. It scores 76, the highest in this set: the material line says polycarbonate, the manufacturer field says Exolon, and the 610 mm by 457 mm size fields agree. Six reviews praise a greenhouse-glass fit and do not describe a defect. Six reviews is a small sample, and this is not a lab test. Best value is the CHEOAR 4 mm twin-wall 10-pack at about £61.99, score 74, because its value part is 15, the highest among the rest. One review says it felt thinner than expected, the brand field says Generic, and fixings are not in the box. The two thin SANJIAOJIA sheets score 55 and 52. They share one block of 70 reviews at 4.2, and reviewers say a rolled sheet would not flatten.
Panda Ant 4 mm solid sheet
Highest score at 76: solid 4 mm, polycarbonate named, Exolon on the manufacturer field, and six reviews that describe a fit. Not a lab test.
CHEOAR 4 mm twin-wall 10-pack
Value part 15, the highest among the rest: ten stated 4 mm twin-wall panels at about £61.99. Not a 10 mm canopy sheet.
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. Listings captured 19 October 2026. 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 already stored for this set. This is not a laboratory test of impact, fire performance or a U-value.
