The most effective way to get rid of bugs in firewood is to season it properly, store it off the ground and away from your house, and remove the bark. Chemical pesticides should never be sprayed on firewood you plan to burn, as they release toxic fumes when heated. The good news is that most firewood insects are nuisance pests, not structural threats, and a handful of simple storage and handling practices will keep them out of your home.
Why Firewood Attracts Insects
Firewood is a buffet and a shelter rolled into one. Bark beetles, longhorned beetles, carpenter ants, termites, and wood borers all tunnel into wood to feed, lay eggs, or overwinter. The bark itself acts as insulation, shielding larvae and adult insects from temperature swings that would otherwise kill them. A stacked woodpile amplifies this effect: the mass of logs creates a stable microclimate where insects thrive even in freezing weather.
Moisture is the other major draw. Freshly cut (“green”) wood can hold 50% or more moisture by weight, which is exactly the environment beetles and ants prefer. As wood dries, it becomes far less hospitable. Getting your firewood below 20% moisture content is the single most important step you can take, and it typically requires at least six months of proper air drying.
Remove the Bark
Bark is where most firewood pests live, breed, and hide their eggs. Stripping it off exposes larvae and egg masses to predators, sunlight, and temperature extremes they can’t survive. Cities dealing with elm bark beetle infestations have made debarking a legal requirement for exactly this reason: removing that protective layer eliminates the overwintering habitat entirely. You don’t need to do a perfect job. Even partially debarked logs lose most of their appeal to insects, because the remaining bark dries out quickly without the surrounding coverage.
Season and Dry the Wood Thoroughly
Properly seasoned firewood burns better and attracts far fewer bugs. Your target is moisture content below 20%, which you can check with an inexpensive pin-style moisture meter from any hardware store. To get there, split your wood as soon as possible after cutting. Splitting exposes more surface area to air and sunlight, which speeds drying dramatically compared to leaving rounds intact.
Stack the split wood in a single row with space between pieces so air circulates freely on all sides. A sunny, breezy location is ideal. Cover the top of the stack to keep rain off, but leave the sides open. Green hardwood like oak or maple needs six months to a year of drying time. Softwoods like pine dry faster, often reaching the target in three to four months during warm weather. Wood that’s been sitting in a shaded, damp pile without airflow can stay wet for years regardless of species.
Store It Off the Ground and Away From Your House
Ground contact invites termites, ants, and moisture. Stack your firewood on a raised surface like a firewood rack or wooden pallets. This creates a gap between the bottom logs and the soil, cutting off the easy path that ground-dwelling insects use to colonize a woodpile.
Keep the stack at least 30 feet from your home’s foundation. Bugs and rodents that establish themselves in a firewood pile will eventually explore nearby structures, and a pile leaning against your house is an open invitation. Thirty feet gives you a meaningful buffer. If your yard doesn’t allow that distance, get as far from the foundation as you can and be especially diligent about the other steps here.
Use Solar Heat to Kill Pests
Solarization works well for smaller batches of firewood you suspect are already infested. Spread the wood in a single layer on a tarp in direct sunlight. Cover it tightly with clear plastic sheeting, tucking the edges under to seal in heat. On a hot, sunny day the temperature under the plastic can climb well above 120°F. Sustained internal temperatures of at least 104°F for a minimum of three days are enough to kill insects and their eggs.
This method works best in summer and in areas with strong direct sun. It won’t be effective in shade or during overcast stretches. For best results, choose the hottest, sunniest days available and leave the plastic in place for a full week if conditions are moderate rather than extreme.
Never Spray Pesticides on Firewood
It’s tempting to grab a can of insecticide, but no pesticide is labeled for use on wood that will be burned indoors. Burning treated wood releases toxic fumes directly into your living space. This applies to any chemical spray, dust, or fogger. The risk isn’t theoretical: combustion breaks down pesticide compounds into gases you’ll breathe in with no way to filter them through a standard chimney or flue. If you have infested wood that you can’t treat by drying, debarking, or solarizing, the safest option is to burn it promptly in an outdoor fire or dispose of it.
Bringing Firewood Inside
Even well-seasoned wood can harbor a few dormant insects. The warmth of your home speeds up their development cycle, which is why bugs that would stay hidden outdoors for months can emerge inside within days. Bring in only what you plan to burn in the next day or two. A small indoor rack near the fireplace or stove is fine for a short-term supply, but storing a week’s worth of wood in your basement or garage gives insects time to wake up and wander.
If you do notice a few beetles or ants crawling out of logs you’ve brought inside, don’t panic. These are almost always wood-dwelling species that have no interest in your furniture, walls, or food. They can’t establish a colony in finished lumber or dry structural wood. Vacuum them up or sweep them outside. The problem is self-limiting once you burn the wood they emerged from.
What to Do With Already-Infested Wood
If you’ve discovered an existing woodpile crawling with insects, your best immediate move is to burn through it. Infested wood still burns fine, and the fire eliminates the problem completely. Prioritize burning the most heavily infested pieces first so you’re not giving larvae more time to mature and spread.
For wood you want to save, strip the bark, restack on a raised surface with good airflow, and let it season. Most insects will either die from exposure or abandon wood that’s drying out. If you’re dealing with a specific pest like elm bark beetles, your local extension office or city forestry department may have regulations about disposal timelines. Some municipalities require infested elm wood to be debarked, burned, or disposed of within ten days of notification to prevent the beetles from spreading to living trees.