Yes, freezing kills bed bugs at every life stage, including eggs. But it only works if temperatures are low enough and sustained long enough. A standard home freezer set to 0°F will kill all stages of bed bugs in about three days, according to the University of Minnesota Extension. Warmer temperatures require significantly longer exposure, and anything above 23°F (-5°C) may not kill them at all.
Temperature and Time Requirements
Bed bugs don’t die the moment they get cold. They need to be held at a lethal temperature long enough for the cold to penetrate through whatever they’re hiding in and destroy their cells. The colder the temperature, the faster this happens.
At 0°F (-18°C), which is where most household freezers operate, all life stages are killed after three days. At the bare minimum threshold of 23°F (-5°C), items need to stay frozen for at least five days. Flash-freezing at -15°F (-26°C) kills eggs almost instantly, cutting the required time dramatically. Purdue University Extension recommends holding items below 0°F for at least four days to be safe.
If you’re not sure your freezer hits these temperatures, extend the treatment to two full weeks. Many home freezers fluctuate between 0°F and 5°F, and auto-defrost cycles can temporarily raise the internal temperature. A simple freezer thermometer placed next to your items will tell you whether you’re in the right range.
Why Eggs Are the Hardest to Kill
Bed bug eggs are more resilient than adults or nymphs. This is true for both heat and cold treatments. With heat, for example, adults die at around 119°F while eggs can survive until temperatures exceed 130°F. The same principle applies to cold: eggs tolerate freezing conditions longer than adults do.
Research from Ohio State University found that all life stages, including eggs, were killed after two or more hours at -17°C (about 1.4°F). But that measurement refers to the temperature of the bugs themselves, not the air temperature of the freezer. Items packed in a bag take time to cool down fully. In one test, a 2.5-kilogram bag of loosely packed dry laundry took about eight hours to reach -17°C inside a freezer. This is why recommendations call for days, not hours. You’re waiting for the cold to reach every bug buried inside the material.
How to Freeze Items at Home
The process is simple but requires patience. Place infested items in sealable plastic bags or tightly secured garbage bags before putting them in the freezer. The bags serve two purposes: they prevent bugs from escaping during transfer, and they keep the items clean inside the freezer. Seal the bags as tightly as possible.
Leave the bags in the freezer for at least four days at 0°F. Don’t open the freezer door repeatedly to check on them, since each opening lets warm air in and can extend the time needed. After treatment, keep items stored in their sealed bags until you’re confident the infestation in your home is resolved. This prevents re-infestation from bugs still active elsewhere in your living space.
Freezing works well for items you can’t easily wash or dry on high heat: shoes, bags, books, picture frames, small electronics, stuffed animals, and delicate fabrics. Bulkier items take longer to freeze through to the core, so give them extra time. Thin items like individual garments or papers will reach lethal temperatures faster than a thick hardcover book or a packed shoe.
What About Leaving Items Outside in Winter?
Outdoor cold can work, but it’s unreliable. The key requirement is sustained, consistent temperature below 0°F. Most winter days in temperate climates don’t stay that cold around the clock, and daytime warming or sun exposure on a porch can push temperatures well above the lethal threshold. Bed bugs that warm up even briefly between cold spells can survive.
A chest freezer or standalone deep freeze gives you far more control than outdoor conditions. If you do attempt outdoor freezing, monitor the temperature continuously with a thermometer and add extra days to account for fluctuations.
Professional Freezing Treatments
Pest control companies use a different approach to cold treatment. Instead of slow freezing, they spray items and surfaces with carbon dioxide converted into dry ice particles. This “snow” exits the equipment at roughly -112°F (-80°C), killing bed bugs and their eggs on contact within about 30 seconds.
The speed matters. Bed bugs can produce natural antifreeze compounds (sugars, alcohols, and proteins) that lower their internal freezing point when they sense gradual cooling. At -112°F, the temperature drop is so sudden that bugs can’t mount this defense. Their cells freeze and rupture before any protective response kicks in. This makes professional CO2 treatments effective as a spot treatment for cracks, seams, and surfaces where bugs are visible, though it only kills what the spray directly contacts.
Freezing vs. Heat Treatment
Heat is generally faster and more practical for large-scale treatment. Laundering clothes in hot water or tumble drying on high heat (above 122°F) for 20 minutes kills all life stages. Professional whole-room heat treatments maintain 118°F for at least 70 minutes and can clear an entire space in one session.
Freezing is better suited for individual items, especially things that can’t tolerate heat. It’s a useful tool within a broader treatment plan, not a standalone solution for a whole-home infestation. You can’t freeze a mattress in a household freezer, and you can’t freeze bugs hiding inside walls. For anything beyond a handful of portable items, freezing works best as one piece of a larger strategy that includes heat treatment, encasements, and professional inspection.