Should you burn cardboard in your fireplace?
Mia Horton
Updated on January 09, 2026
Cardboard in all forms (including pizza, cereal, and shipping boxes) should never be burned in your fireplace. These materials are often treated with wax, plastic, ink, paint, and other materials which can release toxic fumes when burned.
Is burning cardboard bad for chimney?
Here is a list of items you should NOT burn in your fireplace this winter. Cardboard – Cardboard is often treated with or contains man-made chemicals. When these chemicals are burned, it can release hazardous fumes into the air that are harmful to breathe in.What should you not burn in a fireplace?
10 Things You Should Never Burn in Your Fireplace or Woodstove
- Wet wood. Wet, or unseasoned, firewood can contain up to 45 percent water. ...
- Christmas trees. ...
- Painted or treated lumber. ...
- Any type of paper with colored print. ...
- Plywood, particle board, or chipboard. ...
- Fire accelerants or fire starters. ...
- Plastics. ...
- Dyer lint.
Is cardboard toxic when burned?
Cardboard. While it's easy to ignite and may seem like a good way to help get a fire started, burning cardboard can be dangerous. Because cardboard is treated with chemicals and often contains inks, it can release them into the air when burned. You don't want to breathe those in!What is wrong with burning cardboard?
Cardboard is often treated with chemicals. Burning it could release hazardous fumes. Also, once ignited, cardboard tends to float up with the flames. That's not only a fire hazard in your house, should it get past your screen, but outdoors as well — that burning cardboard could travel up the flue and out the chimney.What NOT to burn in your fireplace
Can you burn cardboard in a wood burner?
CardboardIn a similar fashion to chipboard and plywood, cardboard is treated with an array of chemicals and resins. Even though it burns relatively well it should be avoided at all costs when looking to fuel your stove.
Can I start a fire with cardboard?
Cardboard. Small recyclables are often used to start a roaring fire because they usually catch fire quickly. The next time you need to get a fire going, however, don't use cardboard (including pizza boxes and cereal boxes), which is often treated with chemicals.Is it bad to burn paper in your fireplace?
Keep Your Fires SafeTo keep your fireplace and chimney safe and functioning properly, you should avoid putting trash and paper (especially colored and glossy paper) into your fireplace. These materials contain chemicals that are toxic when burned.