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Best polycarbonate sheet

Updated: 23 October 2026

Best is useless until you name the hole you are filling. If you want one flat pane the size of a greenhouse glass, the best polycarbonate sheet in this amazon.co.uk set is the solid 4 mm board. If you want several fluted panels, the best value is the 4 mm twin-wall 10-pack. If the sheet must lie flat and the listing is a thin roll, skip it. None of these four is a 10 mm or 16 mm roof sheet. The shortlist is our [polycarbonate sheet comparison](/hub/diy-supplies/polycarbonate-sheet). Prices and stars are from those amazon.co.uk pages. We did not run an impact test. A qualifying purchase can earn a commission at no extra cost to you.

Best is useless until you name the hole you are filling. If you want one flat pane the size of a greenhouse glass, the best polycarbonate sheet in this amazon.co.uk set is the solid 4 mm board.

Our top picks

Panda Ant Panda Ant 4 mm solid sheet

Best overall

Panda Ant Panda Ant 4 mm solid sheet
7.6/10about £24.99
View offer
CHEOAR CHEOAR 4 mm twin-wall 10-pack

Best value

CHEOAR CHEOAR 4 mm twin-wall 10-pack
7.4/10about £61.99
View offer
SANJIAOJIA SANJIAOJIA sheet, 1 m × 2 m

Alternative

SANJIAOJIA SANJIAOJIA sheet, 1 m × 2 m
5.5/10about £32.90
View offer
On this page
  1. 1.Top pick for one pane
  2. 2.Best value for a greenhouse run
  3. 3.When the 70-review sheets lose
  4. 4.What best does not mean

Top pick for one pane

The top pick is the solid Panda Ant sheet, ASIN B0GPNX1Z7L, 610 mm by 457 mm by 4 mm, at £24.99. The rating is 5.0 from six reviews. Six is a small sample, so treat the perfect score as no fault reported yet, not as a large UK trial. One buyer used two panels to replace broken greenhouse glass at that exact size. The manufacturer field reads Exolon and the origin reads Germany. You are paying for a ready glass size, about 0.28 square metres, not for the cheapest square metre. Skip it if you need flutes or more than one pane. The thickness order, including when 4 mm is the wrong roof, sits on the polycarbonate sheet buying guide.

Best value for a greenhouse run

The best value pick for a run of panels is the CHEOAR 10-pack, ASIN B0F94D8L99: ten twin-wall sheets at about 61 cm by 121 cm by 4 mm, £61.99, rated 4.9 from 23 reviews. The brand field is Generic. Ten sheets is roughly 7.4 square metres, near £8.40 per square metre from the price and the stated size. That is our arithmetic, not a seller's claim. One reviewer said it was thinner than expected, so check a corner with a ruler. The included-components field says NO. The seller's 89% light figure sits above The Glazing Shop's about 82%, and it is not a measurement we made. Who should step up to 6 mm, which this set does not stock, is on the polycarbonate sheets for a greenhouse page.
Panda Ant Panda Ant 4 mm solid sheet

Testsieger

Panda Ant Panda Ant 4 mm solid sheet
7.6/10about £24.99
View offer

When the 70-review sheets lose

The two SANJIAOJIA listings show about 70 reviews each. Do not add 70 and 70. The comparison records a shared review block, so the same comments are doing duty on both pages. Curl comes up, and so does a sheet that is too thin for a shed window. These are about 1 mm rolls, not 4 mm glazing. If the sheet has to lie flat in a rebate or on glazing bars, both of these lose. A thin flexible sheet can be a temporary cover you can bend. It is not the best polycarbonate sheet for a greenhouse pane.

What best does not mean

Best, on this page, means the better match among four listings we actually hold, for a job those listings can do. It does not mean we tested impact, hail, or a temperature swing, and it does not mean either pick carries a BS EN 16153 certificate. It does not mean a roll will flatten if you leave it in the sun. It also does not mean 10 mm or 16 mm. The Polycarbonate Store prices 10 mm twin-wall at £16.94 per square metre as trade context. The barrier is stock, not a huge price jump. If your span needs that thickness, leave this set. If you are still choosing between acrylic and polycarbonate, settle the polymer before you treat the word clear as the material.

Common questions

Which polycarbonate sheet is the top pick here?
For one greenhouse-glass-sized opening, the top pick is the solid Panda Ant sheet, B0GPNX1Z7L, at 610 mm by 457 mm by 4 mm and £24.99. The manufacturer field reads Exolon. The rating is 5.0 from six reviews, which is a small sample and should stay attached to that limit. Skip it if you need several insulated panels rather than one flat pane.
Which is the best value if I need several greenhouse panels?
The CHEOAR 10-pack, B0F94D8L99, at £61.99. Ten twin-wall sheets of about 61 cm by 121 cm by 4 mm, rated 4.9 from 23 reviews. The box does not include tapes or fixings, and one review said the sheet was thinner than expected. It is the value pick for a 4 mm greenhouse run, not a 10 mm roof.
Why not the sheet with 70 reviews?
The two thin SANJIAOJIA sheets show about 70 reviews, and the block is shared, so you should not add the counts. Reviewers report curl and a sheet that is too thin for a shed window. A larger number does not turn a 1 mm roll into a 4 mm pane. If the sheet must lie flat, those listings lose.
Is 5.0 from six reviews enough?
It is enough to say that the six people who wrote did not report a fault, and that one of them fitted two panels as greenhouse glass. It is not enough to call the sheet proven across a season of UK weather. Pair the score with the size, the Exolon manufacturer field, and the fact that you can measure 4 mm with a ruler when it arrives.
Is the CHEOAR pack the same as a trade 10 mm roof sheet?
No. It is 4 mm twin-wall in a ten-pack, with a Generic brand field and no included fixings. Trade 10 mm sheet is a different thickness, used for small canopies, and The Polycarbonate Store lists it at £16.94 per square metre. The seller's 89% light claim is not our measurement and sits above the 82% figure merchants quote for 4 mm twin-wall.
What if I need 16 mm?
You will not find it in this set. Sixteen millimetres is a longer-span multiwall sheet, and 4 mm is the wrong substitute even if the price looks friendly. Go to a trade supplier, ask for the support spacing, and ask whether the sheet is marked to BS EN 16153. Then use the buying guide for the thickness decision, not this shortlist.

Related pages

Polycarbonate sheet vs acrylic

How to fit a polycarbonate sheet

Polycarbonate sheet

Polycarbonate sheet buying guide for span and type

Polycarbonate sheets for a greenhouse: 4 mm or 6 mm

Sources

Public UK sources and the amazon.co.uk listings compared on this page. Listings captured 19 October 2026. Updated 23 October 2026.

  1. The Glazing Shop thickness guide (retrieved 19 October 2026)
  2. The Glazing Shop buyers guide (retrieved 19 October 2026)
  3. BSI, BS EN 16153:2013+A1:2015 (retrieved 19 October 2026)
  4. Approved Document B amendments (retrieved 19 October 2026)
  5. Brett Martin TB413 (retrieved 19 October 2026)
  6. Brett Martin Marlon ST (retrieved 19 October 2026)
  7. RHS: choosing greenhouses (retrieved 19 October 2026)
  8. Class E, GPDO 2015 (retrieved 19 October 2026)
  9. The Polycarbonate Store twin-wall (retrieved 19 October 2026)