Can You Recycle Shredded Paper? Same Pile, Two Different Endings

Two identical piles of shredded paper can end up in completely different places, and the difference is whether the paper goes into a bale or into a bin. Shredded paper handled by a secure destruction service is baled at the facility and shipped straight to a paper mill, skipping the sorting line entirely. The same paper loose in a kerbside bin usually fails, because the strips fall through screens, stick to glass and plastic, and are too small for optical sorters to identify. Most programmes therefore refuse loose shreds outright.

That distinction is worth knowing before you buy a shredder, not after.

Two routes, two endings

• Loose in a kerbside bin. Falls through screens, contaminates other materials, frequently ends as residue.
• Bagged, where a programme allows it. Sorted out as a bagged item and handled separately, if the rules are followed exactly.
• Through a secure destruction service. Shredded, baled on site or at a facility, and shipped directly to a paper mill, never entering a sorting line.
• Composted. Works well, and is often the best household answer.
• In general waste. The honest answer where no route exists.

One provider states the position plainly: in-house shredding commonly leads to shredded paper being landfilled, because recycling systems are not designed to capture loose shreds. The commercial stream avoids that by never asking a sorting line to handle it.

What goes wrong at a sorting facility

• Strips fall through the screens designed to separate containers, ending up in the residue line rather than the paper bale.
• Optical scanners need a minimum piece size to identify a material. Below it, the item is unclassifiable and is treated as waste.
• Shreds stick to glass jars and plastic containers, contaminating those streams and lowering the value of the bale they end up in.
• Some sorters misread confetti as organic waste, which increases contamination and can downgrade a bale.
• It coats the plant. Operators report shreds stuck to equipment and ceilings, which is a housekeeping and safety problem as much as a sorting one.
• Loose shreds blow away during collection and tipping, becoming litter before they reach a machine.

That is why almost every programme that accepts shredded paper insists on containment, and why many simply refuse it.

The size threshold in the research

There is a measured answer to how small is too small, and it rarely appears in consumer guidance.

A peer-reviewed study on the papermaking potential of shredded waste found that cutting paper into pieces with an area below 25 square millimetres caused significant changes in fibre morphology and a sharp decrease in the tensile properties of the reconstituted paper.

Where each shredder falls

Comparing that threshold with typical cut sizes is our own arithmetic rather than the study’s, but it is straightforward:

• Commercial strip shredders cut to around three eighths of an inch wide across a full page. The resulting area is enormous, far above the threshold.
• Home strip-cut shredders produce long ribbons, also well above it.
• Home cross-cut shredders typically produce pieces of roughly 4 by 30 to 40 millimetres, around 120 to 160 square millimetres. Still above.
• Home micro-cut shredders produce pieces closer to 2 by 12 millimetres, roughly 24 square millimetres, which sits at or below the point the research identified.

So the security level you choose has a fibre consequence. Micro-cut is the right answer for genuinely sensitive documents and the worst answer for the paper’s onward life.

What shredding does to the fibre

• Paper fibres shorten every time they are recycled. Shredding accelerates that before the mill even sees the material.
• It downgrades the paper. Office paper is a high grade; shredded office paper is handled as mixed grade, which becomes kitchen towel and packing paper rather than new office paper.
• It increases bulk density, which reduces transport efficiency and raises the cost of moving the same fibre.
• Shreds pack tightly, trapping inks and adhesives that then interfere with the deinking process.
• A network of civil society groups working on pulp and paper sustainability recommends shredding only when necessary, for exactly these reasons.

That last recommendation is the one most worth acting on, and it is covered below.

If your programme does accept it

Rules differ more here than for almost any other material, so check yours and follow it exactly.

• Never loose. Every accepting programme requires containment of some kind.
• Clear plastic bag where specified, so staff can identify the contents without opening it.
• Paper bag, tied or folded shut, where the programme prefers fibre containment.
• A cardboard box, taped closed, where that is the stated rule.
• Bring it directly to a drop-off point if your programme accepts it there but not at the kerb, which is a common arrangement.
• Keep it dry, since damp shreds compact into a mass that no process can handle.

If the guidance is ambiguous, treat that as a no. A wrongly presented bag of shreds costs the facility more than it returns.

The better uses

For most households these beat recycling, and none of them require a programme to cooperate.

• Compost. Shredded paper is excellent carbon-rich material, balancing wet food waste. Avoid glossy stock and heavily coloured print.
• Animal bedding. Shelters, rescues and small-pet owners take clean shreds readily. Phone first.
• Packing material. It protects as well as bought void fill and costs nothing.
• Mulch. A layer under bark or compost suppresses weeds and breaks down over a season.
• Fire starters, where you have a wood burner and the paper is not glossy.

The question worth asking first

Before any of this: does the document need shredding at all?

Most household paper carries no sensitive information. Catalogues, envelopes without windows, magazines, receipts for cash purchases and general correspondence can go into ordinary paper recycling whole, where they are worth more and sort correctly.

What genuinely warrants destruction is a much shorter list: anything with an account number, a national insurance or social security number, a signature, a date of birth, medical detail or a full card number.

Shredding everything is a habit rather than a security policy, and it converts high-grade fibre into low-grade fibre for no benefit. For the documents that do need it, a secure service gives you both destruction and a route to a mill, usually with a certificate recording the date, method and weight.

Where this fits

Why bagging normally ruins a recycling load, and the one exception, is covered on our page about bin bags and bagged recycling. Why some paper is refused despite being paper is explained in greasy pizza boxes, and the wider stream question sits on the recycling hub.

How we produced this

The sorting failures are described from published material recovery facility guidance and operator commentary, including reports of shreds adhering to plant equipment. The 25 square millimetre threshold and the finding on tensile properties come from a peer-reviewed study on the effect of shredding degree on papermaking potential.

The comparison between that threshold and typical shredder output is our own calculation using commonly published cut dimensions, not a finding of the study. Cut sizes vary by machine and security rating, so treat it as an illustration of where the boundary sits rather than a specification.

The description of commercial destruction handling, including baling and direct shipment to mills, comes from secure destruction providers describing their own processes. Those providers have a commercial interest in the comparison with home shredding, which we note rather than obscure; the underlying mechanism, that baled material bypasses the sorting line, is not in dispute.

Acceptance rules differ by council and are the only rule that applies to your bin.

Frequently asked questions