What Wood and Rubbish You Should Never Burn

If you are relying on a stove or open fire this winter, the single most useful rule is this: burn only well-seasoned wood or fuel carrying the Ready to Burn mark, and keep treated, painted, glued or wet timber and household rubbish out of the fire entirely¹. Fire and rescue services across the UK say the same thing, because the wrong fuel produces toxic fumes, raises the risk of a chimney fire and can lead to carbon monoxide poisoning³.

The temptation is understandable. Scrap pallets, old fence panels, furniture offcuts and bin bags of cardboard all look like free heat. They are not. Treated waste wood and household rubbish can emit harmful fumes and toxic pollutants, such as arsenic, into your home when burnt⁵. Burning other materials can cause toxic fumes and increase the risk of chimney fires and carbon monoxide poisoning³.

This page sets out what must never go on a fire, why it matters indoors, how to tell good fuel from bad, and what to do with the waste instead. It is for anyone with a wood burner, multi-fuel stove, open fire or garden bonfire, and for anyone who has never used one before and wants to get it right.

Wood that must never go on a fire: painted, treated and wet timber

The clearest line is drawn around treated wood. Do not burn treated wood, such as painted, stained or chemically treated wood, which includes old furniture, pallets and medium density fibreboard; these release dangerous pollutants which could have a serious impact on human health². Oxford City Council's clean air guidance puts it just as plainly: do not burn wet or treated, painted or glued wood¹.

That covers more than most people expect. Fence panels, decking offcuts, old skirting boards, varnished shelves and manufactured boards all fall on the wrong side of the line. Firepit and chiminea users are told never to use painted, coated or pressure treated wood, as these can release toxic chemicals into the air¹⁰. Bonfire guidance adds treated, painted or varnished wood to the list of things that can give off harmful chemicals¹¹.

Wet timber is the other half of the problem. Burning wet or green wood, treated wood, rubbish or plastics can produce harmful substances and increase the risk of chimney fires¹². A fire service press release from September 2026 makes the mechanism clear: avoid burning treated or painted wood, household waste or wet timber, as these can produce toxic fumes and contribute to dangerous tar build-up in the flue¹³. That tar is what fuels chimney fires.

So the rule for the woodpile is simple. Seasoned logs, or manufactured solid fuel that is legal for your appliance, and nothing else. If you are not sure how dry your logs are, the next section explains the labels to look for.

Household rubbish to keep out of the stove or open fire

Household rubbish is not fuel, however flammable it looks. Fire services advise never to burn cardboard boxes or wastepaper⁶, and never to put paper or rubbish on a fire once it is burning, because it can create floating embers that can land on things in your home or set light to the chimney⁷. Government public health advice is equally direct: do not burn old furniture, pallets or fence panels, household rubbish or fuels such as petrol, diesel or lighter fluid, as this could cause an explosion, fire or release of harmful chemicals¹⁴.

The list of things that must stay out of a fire is longer than most households realise:

• Plastics, rubber and foam: bonfire guidance says do not burn tyres, cylinders, canisters, aerosols, paints, plastics, rubber or foam-filled furniture⁹.
• Aerosols, batteries, bottles, tins of paint and tyres: all named as things not to burn¹⁵.
• Petrol, paraffin, diesel or lighter fluid: never use these to light or revive a fire; they can cause an explosion or fire¹⁴.
• Wet or green garden waste: avoid burning it, as it creates excessive smoke and can cause nuisance¹¹.

There is a household safety point that sits alongside this. Never store rubbish, recycling or anything that can ignite in corridors, common areas, stairwells or escape routes¹⁷. And do not overfill your wheelie bin or leave loose rubbish around it, which is one of the ways bin fires start¹⁸.

Why burning the wrong material is dangerous indoors

Indoors, the wrong fuel does three things at once, and all of them are serious. It produces toxic fumes in the room, it coats the flue with tar that can catch fire, and it raises the level of carbon monoxide, an invisible gas you cannot smell³. Fire services put it in one sentence: burning other materials can cause toxic fumes and increase the risk of chimney fires and carbon monoxide poisoning⁴.

Chimney fires are the visible consequence. Tar and creosote from poor fuel and slow, smouldering fires build up inside the flue, and a chimney fire can spread into the roof space. Fire services advise burning only the correct fuel, because burning other materials can cause toxic fumes and increase the risk of chimney fires and carbon monoxide poisoning¹³. The prevention advice is consistent: burn seasoned wood, keep the flue clear and have the chimney swept regularly.

Carbon monoxide is the invisible one. Fire services advise fitting a carbon monoxide alarm in any room containing a wood-burning stove, open fire or other solid fuel appliance, and testing it regularly⁸. The alarm is a backstop. It does not make it safe to burn the wrong fuel; it gives you warning if something has gone wrong.

There is also a basic rule about where a fire belongs. Government advice says do not light a fire indoors unless you have a proper heating appliance for the purpose or a fireplace with a working chimney, and do not use camping stoves or barbecues indoors¹⁴. Cumbria Fire and Rescue Service adds: never use a barbecue inside to keep you warm²⁰. If you are heating a room without mains power, the safe options are covered in Keeping One Room Warm When the Heating Fails and Wood Burners and Multi-Fuel Stoves in a Power Cut.

Ready to Burn and other labels that show wood is safe to use

The easiest way to know your fuel is right is to look for the label. Always look for the approved Ready to Burn logo when buying fuel¹. The mark helps consumers to easily identify solid fuels that are legal to burn at home in compliance with the Air Quality Regulations²¹, and it certifies firewood at no more than 20% moisture content²¹.

If you are using a wood burner or fireplace, only burn fuels marked Ready to Burn²². That single habit removes most of the guesswork about whether a bag of logs is dry enough or legal where you live.

If you cut and store your own wood, the same standard applies in practice: it must be well seasoned, meaning left to dry out for a long time so the moisture has gone⁷. How long that takes, and how to stack and store logs, is set out in Firewood: How Dry It Should Be and How to Season Logs.

Where you live matters here. Smoke control areas restrict what can be burned, and the Ready to Burn mark exists partly to make compliance simple⁵. Check with your council whether your home is in one before you light a stove or open fire; the rules and the authorised fuels are explained in Smoke Control Areas: What You Can Burn and Where.

What to do with waste wood and rubbish instead

The good news is that almost everything you might be tempted to burn has a proper route out of the house. Treated timber, painted boards, MDF offcuts, old furniture and fence panels go to your local household waste recycling centre or a licensed waste collection, not the stove or the bonfire. Household rubbish and recycling go in the bins your council collects.

Garden waste is best composted or taken to the council's green waste service. Do not throw cuttings onto adjacent land or let them dry out in your garden, because they are fuel in the event of a fire²⁴. If you do have a garden bonfire within your council's rules, keep it small, never leave it unattended, and keep a bucket of water or a hose nearby.

Outdoors, the fire risk is real and rising in dry weather. Fire services advise avoiding lighting open fires in the countryside²⁵, and say never to start a fire of any kind, because a fire in the open can easily get out of control²⁶. Northern Ireland's fire service gives the same summer advice: avoid lighting open fires in the countryside²⁵. Smoking materials should be fully stubbed out and disposed of carefully, and cigarette ends should never be thrown from vehicles or onto the ground²⁴.

Pallets, offcuts and other fuels people ask about

A few specific materials come up again and again, so they are worth answering directly.

Pallets and scrap timber. Do not burn them. Pallets are named among the treated waste wood that releases dangerous pollutants when burned², and government advice lists pallets alongside old furniture and fence panels as things not to burn¹⁴. They are often treated, and you cannot tell by looking.

Cardboard and paper. Never burn cardboard boxes or wastepaper⁶, and never put paper or rubbish on a fire once it is burning, because of floating embers⁷. Use kindling and recognised firelighters to start the fire instead.

Plywood and MDF offcuts. Medium density fibreboard is named among treated wood that releases dangerous pollutants². Glues and resins in manufactured boards are part of the problem, so take offcuts to the recycling centre.

Driftwood and salty wood. Keep to seasoned logs or Ready to Burn fuel.

Furniture and foam. Foam-filled furniture is on the do-not-burn list for bonfires⁹, and old furniture is named among treated waste wood². Take it to the recycling centre or arrange a bulky waste collection.

Where to get help and further reading

If you are setting up a stove or open fire for the first time, or relying on one through a power cut, the wider Heating and Cooking Without Mains Power or Gas section covers the practical side: lighting, air controls, fire guards and chimney checks. For the fire itself, see Open Fires: Lighting, Fire Guards and Staying Safe and Using a Wood Burner Safely: Air Controls, Door and Guards.

Chimney maintenance is the other half of safe burning. How Often a Chimney Should Be Swept and Checked explains the schedule, and Chimney Fires: Causes, Warning Signs and What to Do covers what to do if one starts. If you are preparing for winter generally, the Before-Winter Checklist for Your Heating and Stove and Wood Burner Lighting and Safety Kit Checklist set out what to have ready.

For the wider household picture, Home Emergencies: Fire, Carbon Monoxide, Gas Leaks and Burst Pipes covers what to do in a fire or a carbon monoxide alarm, and Extra Help in an Emergency explains support for older, disabled and medically dependent households. If you have no safe way to heat your home, contact your council, which can tell you about warm spaces and local support.