Corrugated plastic or cardboard sheets
Updated: 23 October 2026
You are protecting a hallway, cutting a yard sign, or posting a print, and the search has offered both a fluted plastic board and a brown kraft pad. Corrugated plastic or cardboard sheets answer different jobs, even though both look wavy. Plastic when water or reuse matters. Kraft when the job stays dry and light. Neither is a shed roof. The [corrugated sheets comparison](/hub/diy-supplies/corrugated-sheets) includes the steel packs as well. Peter F., editor for DIY supplies, used amazon.co.uk figures compiled on 20 October 2026. This is not a laboratory test. A qualifying purchase can earn a commission at no extra cost to you.
You are protecting a hallway, cutting a yard sign, or posting a print, and the search has offered both a fluted plastic board and a brown kraft pad.
You are protecting a hallway, cutting a yard sign, or posting a print, and the search has offered both a fluted plastic board and a brown kraft pad. Corrugated plastic or cardboard sheets answer different jobs, even though both look wavy. Plastic when water or reuse matters. Kraft when the job stays dry and light. Neither is a shed roof. The corrugated sheets comparison includes the steel packs as well. Peter F., editor for DIY supplies, used amazon.co.uk figures compiled on 20 October 2026. This is not a laboratory test. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Material | Size | Thickness | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Floor Nation Floor Nation 4 mm sheets, pack of 2 | Corrugated polypropylene | 2.4 x 1.2 m | 4 mm | 10.0 | about £34.95 | View offer |
| Alternative |  yuejuhe yuejuhe 20 A4 kraft sheets | Kraft cardboard | A4, 29.7 x 21 cm | 1.8 mm stated | 9.0 | about £9.95 | View offer |
| Alternative |  NBEADS NBEADS 10 white plastic sheets | Fluted plastic | 40.2 x 30.2 cm | 4 mm in the bullets | 8.4 | about £15.99 | View offer |
On this page
Two flutes, two materials
Correx is the usual UK trade name for fluted polypropylene, not a grade of cardboard. GWP treats it as a plastic board for signs, floors and reusable packs, and treats heavy kraft as a dry alternative that fails once it is wet. tradesinternational makes the same split for decorators: cardboard can cover a short dry job, and it loses strength when paint soaks in, while polypropylene holds the spill on the surface. Use that test before you compare thickness.
On paper, E flute is about 1.5 mm, B about 3 mm and C about 4 mm. A plastic sheet stated at 4 mm is a different object from a kraft pad stated at 3 mm. If you still mean a roof, open corrugated sheets for a shed roof. A £9.95 A4 pad will not replace felt.
Floors and signs
The only full-size floor sheet here is Floor Nation: two black sheets, 2.4 x 1.2 m, stated 4 mm, about £34.95, with 5.0 from three ratings. Packs of one to four sheets arrive rolled, so you flatten them first. Three reviews are a thin sample. The listing does not mention LPS 1207, so it is not a flame-retardant certificate.
NBEADS is ten white sheets at about 40.2 x 30.2 cm, bullets saying 4 mm. A 40 cm board is not a floor. The material line says plastic, one bullet says cardboard, and a review from Sweden says cardboard arrived. Check the parcel. Kraft is the wrong outdoor sign, because rain takes the strength out of the paper. For a wet floor, Floor Nation is the size that matches the job, if you accept three ratings and a rolled delivery.
Posting a print
The kraft titles are single-wall pads, not the double-wall board a print mailer usually means. yuejuhe is twenty A4 sheets, stated 1.8 mm, about £9.95, 4.5 from 589 ratings. Reviewers have posted A4 art and also measured about 1.0 mm. That depth makes it the conditional pick for a light parcel or craft, and the wrong pick when the sheet is the only thing keeping a print flat. A BC double wall is around 6 mm. The light A4 pad is named on best corrugated sheets.
MUKCHAP states 3 mm on forty A4 sheets, with six ratings. LUKDNEEY's two ratings call the board too flexible as the only print backing. WOPPLXY has no review line, and a 30 cm square is neither A4 nor A3. If the poster must arrive flat, look outside this set for a double-wall pad.
The roll and the flame test
YOFANNER is a single-face paper roll, stated at 5.21 x 0.31 m, about £11.99. It bends around a curve. The 4.5 from six ratings is not a UK sample. Buy it to wrap a shape. Leave it for a flat print, a floor or a sign.
LPS 1207 is the flame test associated with temporary protection sheet. None of these listings state it. Floor Nation can still cover a domestic floor if the size and the three reviews are enough for you. It is not a certificate for a site manager. Wet floor, or a sign that will see rain: polypropylene. Dry light parcel: yuejuhe. Curve: the roll, with the non-UK reviews in mind. Roof: neither.
Common questions
Is Correx the same thing as corrugated cardboard?
No. Correx is a trade name for fluted polypropylene. Corrugated cardboard is kraft faces and a paper flute. They share a wavy look and little else once water is involved. Floor Nation and, if the parcel matches the title, NBEADS are the plastic side. The A4 pads and the YOFANNER roll are the paper side.
Which one protects a floor if the job is wet?
Fluted polypropylene. Floor Nation's two sheets are 2.4 x 1.2 m at a stated 4 mm, about £34.95, with only three ratings, and they arrive rolled. Kraft softens when paint soaks in, so an A4 pad is the wrong hallway cover. Do not treat the listing as LPS 1207.
Can kraft go outside as a sign?
Not if it will see rain. Paper flute loses strength when it gets wet. NBEADS is the small plastic board here, about 40.2 x 30.2 cm, with 4.2 from 31 ratings. One reviewer wanted a smooth writing surface and did not get one, and one bullet conflicts plastic with cardboard. Check what arrives before you print a sign.
What thickness do these A4 pads state, against a print mailer?
Packaging pages describe double-wall board, with Atlas putting BC flute around 6.1 to 6.7 mm, when a print must stay flat. yuejuhe states 1.8 mm and reviewers have measured about 1.0 mm. MUKCHAP states 3 mm with six ratings. Those are single-wall pads for light parcels and craft, not a print mailer.
Is a small 4 mm plastic sheet a floor sheet?
No. NBEADS is about 40 cm by 30 cm. Floor Nation is 2.4 m by 1.2 m. Both can be stated at 4 mm and still be different tools. Use the small board for a temporary sign, after you confirm it is plastic, and the large sheet for the floor.
Does ordinary fluted polypropylene count as flame-retardant sheet?
Not on these listings. LPS 1207 is the test name, and Floor Nation's page does not mention it. A domestic job can still use the 4 mm sheet as a water-resistant cover. A site that asks for the certificate needs a product that states it.
When is the single-face roll the right buy?
When you need a wrap that bends around a curve. YOFANNER is stated at 5.21 x 0.31 m for about £11.99. It is the wrong buy for a flat print: it is not a rigid pad, the thickness is unstated, and the six ratings are not UK reviews. One review received four shorter pieces.
Related pages
Sources
Public UK sources and the amazon.co.uk listings compared on this page. Updated 22.10.2026.
- HSE: Fragile surfaces (retrieved 22.10.2026)
- Work at Height Regulations 2005, regulation 6 (retrieved 22.10.2026)
- Building Regulations 2010, Schedule 2 (retrieved 22.10.2026)
- Planning Portal: Outbuildings (retrieved 22.10.2026)
- Cladco: Corrugated sheets (retrieved 22.10.2026)
- Briarwood: 13/3 declaration (retrieved 22.10.2026)
- GWP: Corrugated board grades (retrieved 22.10.2026)
- GWP: What is Correx (retrieved 22.10.2026)