Foam is not one material, and the answer flips depending on which you have. Polystyrene packaging foam is easy to recycle chemically and almost impossible to collect economically. Polyurethane foam from mattresses and cushions is the opposite: chemically difficult, yet it feeds an established market where bonded recycled foam makes up roughly 85 percent of all carpet cushion sold in the United States. The foam most people worry about has no route. The foam nobody thinks about has one of the most successful recycling markets in the country.
That inversion is worth understanding before you look up a drop-off point for the wrong material.
Five foams, and what each one is
| Expanded polystyrene | Extruded polystyrene | Flexible polyurethane | Polyethylene | Hard polystyrene | |
|---|---|---|---|---|---|
| Measurement | What it is, how it feels, and whether a route exists | Same | Same | Same | Same |
| Where you see it | Packaging blocks, cups, trays | Insulation board, usually pink, blue or green | Mattresses, sofa cushions, car seats | Sheet foam, camping mats, shoe inserts | Cutlery, appliance parts, disc cases |
| Feel test | Crunchy, breaks into beads | Smooth cells, snaps cleanly | Springs back, tears rather than snaps | Soft, flexible, bends without breaking | Rigid, brittle, not foam at all |
| Chemistry | Thermoplastic | Thermoplastic | Thermoset | Thermoplastic | Thermoplastic |
| Established recycling market | Weak, industrial only | Weak | Strong, through rebond | Limited, mostly industrial | Limited |
| Household route | Drop-off if clean | Construction waste | Mattress programmes | Rarely | Rarely |
The feel test in the third row does most of the work. Squeeze it: if it crumbles into beads you have expanded polystyrene, if it springs back you have polyurethane, and those two go to completely different places.
The counterintuitive part
Why polyurethane should be the hard one
Flexible polyurethane foam is a thermoset. It is formed by a chemical reaction between a polyol and an isocyanate, and those bonds are strong enough that the material cannot simply be melted and reused the way a thermoplastic can.
On paper that makes it far harder to recycle than polystyrene, which melts readily.
Why it works anyway
Because somebody built a market for it. Scrap foam is ground into small pieces, bonded with adhesive and heat into a large cylinder, and that cylinder is peeled into thin sheets.
The product is bonded foam, usually called rebond, and it is the carpet cushion under a very large share of American floors. Industry figures put it at approximately 85 percent of all carpet cushion sold, and around 90 percent of the flooring underlay market. Virgin polyurethane underlay is now the small niche.
Nearly a billion pounds of reclaimed polyurethane scrap went into rebond in a single reported year.
That is the lesson the polystyrene story keeps proving in reverse: recycling works where an end market exists, not where the chemistry is convenient. Our analysis of what actually gets recycled finds the same relationship across every material.
Mattresses, where the volume sits
Mattress foam is the largest single stream of recoverable polyurethane in a household context.
- Around 300 million pounds of polyurethane foam a year goes into US mattresses.
- A single recycling facility has been reported recovering 800 pounds of foam a day.
- The sector's recycling council reports having helped recycle more than 15 million mattresses that would otherwise have gone to landfill.
- Recovered foam is baled and shipped to roughly thirty processing facilities nationally.
- Rebond markets beyond carpet cushion now take 5 to 10 percent of output in North America, for car acoustic insulation, gym pads, pet beds and mattresses.
The practical consequence is that a mattress is one of the few bulky household items with a genuine recycling infrastructure behind it, even though most routes still charge a fee.
Why memory foam complicates it
Mattress foams come in three families that look similar and behave differently: high resilience, conventional, and viscoelastic, which is what memory foam is. They differ in the molecular weight of the polyol used to make them.
Sorting those apart is the barrier to higher-value chemical recycling back into polyols, because discarded mattresses arrive in unknown and inconsistent mixtures. Mechanical recycling into rebond is more tolerant, which is why it dominates.
Insulation board is a building material
Extruded polystyrene board, the coloured rigid sheet used in construction, is not packaging and is not handled like it.
It goes through a construction and demolition waste route rather than a household one. Some manufacturers and regional programmes take clean offcuts, but there is no general drop-off network equivalent to the packaging one.
If a renovation is producing it in volume, ask the removal contractor whether foam is separated or sent with general debris. The answer varies, and our note on paying for removal against selling material covers how to read that quote.
Polyethylene and the soft sheet foams
The pale, flexible sheet foam wrapped around furniture and electronics is usually polyethylene rather than polystyrene. So are camping mats, pipe lagging sleeves and many shoe inserts.
It is a thermoplastic and technically recyclable, but household collection barely exists. Industrial generators can find buyers; a household cannot. Reuse is the realistic answer, and it protects a parcel better than bubble wrap.
Ethylene-vinyl acetate, the rubbery foam in shoe soles and play mats, is harder again and has effectively no household route.
How to work out what you have
- Squeeze it. Beads mean expanded polystyrene. A spring-back means polyurethane. A soft bend without damage means polyethylene.
- Look at the colour. Rigid pink, blue or green board is extruded polystyrene insulation.
- Try to tear it. Polyurethane tears with a ragged edge. Polystyrene snaps and sheds beads.
- Check where it came from. Packaging, bedding, construction and footwear are four different materials that all get called foam.
- Look for a code. A 6 means polystyrene, but most foam carries no marking at all.
Common mistakes
- Treating all foam as one material and looking for a single drop-off point.
- Taking mattress foam to a packaging foam programme. Different material, different processors.
- Assuming insulation board is packaging. It is construction waste.
- Believing memory foam is more recyclable because it is expensive. It is harder to sort and worth less to a processor.
- Putting any foam in a kerbside bin. None of these belong there, and all of them contaminate.
- Burning any of it. Polyurethane and polystyrene both produce toxic fumes.
- Cutting mattress foam up before checking. Programmes generally want the mattress intact so it can be dismantled properly.
Where this fits
The packaging foam question is covered in detail on our page asking whether foam packaging is recyclable, and the practical routes for each type of packaging foam are set out in how to dispose of foam. The wider question of which stream any household item belongs to sits on the recycling hub.
How we produced this
The polyurethane figures, including the rebond share of the carpet cushion market, the annual scrap volumes and the mattress recovery statistics, come from the polyurethanes industry association and the flexible foam trade body, and are attributed in the text rather than presented as our own measurement. The thermoset chemistry and the three mattress foam families are described in the same published material and in patent literature on foam sorting.
The identification tests are practical rather than definitive. No squeeze test distinguishes a high resilience foam from a viscoelastic one, and where a processor needs that distinction it is done analytically rather than by hand.
Programme availability differs enormously by region, and mattress schemes in particular exist in some states and not others. Check your own authority before assuming a route exists.
Frequently asked questions
Is all foam recyclable?
No, and the answer changes completely by type. Polystyrene packaging foam is chemically easy to recycle but almost impossible to collect economically. Flexible polyurethane from mattresses and cushions is chemically difficult but feeds a large established market. Polyethylene and EVA foams have almost no household route.
How do I tell which foam I have?
Squeeze it. Expanded polystyrene crumbles into beads, polyurethane springs back and tears with a ragged edge, and polyethylene bends softly without breaking. Rigid coloured board in pink, blue or green is extruded polystyrene insulation.
What is rebond?
Bonded recycled polyurethane foam. Scrap is ground, mixed with adhesive, bonded under heat into a cylinder, then peeled into thin sheets. It accounts for roughly 85 percent of carpet cushion sold in the United States, with virgin polyurethane underlay now the smaller niche.
Why is polyurethane harder to recycle than polystyrene but more successfully recycled?
Because chemistry is not the constraint, markets are. Polyurethane is a thermoset formed by a reaction between a polyol and an isocyanate, so it cannot simply be melted. But an end market exists in carpet cushion, and polystyrene packaging has no equivalent demand pulling it through.
Can mattress foam be recycled?
Yes, where a programme exists. Around 300 million pounds of polyurethane foam a year goes into US mattresses, one facility has been reported recovering 800 pounds a day, and the sector council reports helping recycle more than 15 million mattresses. Most routes still charge a fee.
Is memory foam recyclable?
Less easily than ordinary foam. Memory foam is viscoelastic, one of three mattress foam families alongside high resilience and conventional, and they differ in polyol molecular weight. Sorting them apart is the barrier to higher-value chemical recycling, so most recovered foam goes to mechanical processing instead.
What happens to insulation board from a renovation?
It goes through a construction and demolition waste route rather than a household one. Some manufacturers and regional programmes take clean offcuts, but there is no general drop-off network for it. Ask a removal contractor whether they separate foam or send it with general debris.
Is the soft sheet foam around furniture recyclable?
It is usually polyethylene, which is technically recyclable but has almost no household collection. Industrial generators can find buyers, households cannot. Reuse is the realistic answer, and it protects a parcel better than bubble wrap does.
Should I cut up a mattress before recycling it?
No. Programmes generally want it intact so it can be dismantled properly and the foam, springs, fibre and cover separated cleanly. Cutting it first can disqualify it and creates a bulky mess that is harder to move.
Can any of these foams be burned or composted?
No. Polystyrene and polyurethane both produce toxic fumes when burned, and burning household waste is an offence in most places. None of these materials biodegrade in any meaningful timeframe, so composting is not an option either.