Firewood And Pests: What Rides In With The Woodpile

Most of what comes indoors on firewood is harmless. The borers, ants and spiders that ride in with a load of split oak do not attack finished wood in a house, and the wood itself should never be sprayed. The part that matters is outside: a stack sitting on bare soil against the foundation.

Late September is when the wood gets delivered and stacked around Stark and Summit counties, and it is also when people call about beetles on the hearth rug. Those two things are connected, but not in the way most homeowners assume.

What Is Actually Living In A Load Of Firewood

University of Kentucky entomologists sort firewood insects into two groups: the ones that feed on wood, and the ones that are only using it for shelter. Beetles make up most of the first group, including roundheaded borers, flatheaded borers and shothole borers. Almost none of it threatens the house, and Kentucky says so directly: most of these insects cause alarm out of proportion to any harm they do.

Why They Crawl Out Once The Wood Is Inside

Heat. A log that has been frozen or cold since October holds insects that are barely moving. Stack it by a warm hearth for a week and development picks up where it left off, and the adults chew their way out into your living room. The timing feels like an infestation and is really just a thermostat.

That is why Purdue Extension gives one plain rule for storing firewood: bring in only the wood you are going to burn that day. Wood that sits indoors for weeks is wood that has time to hatch. A rack on the porch or in an unheated garage keeps the same load quiet.

The Stack Against The Garage Is The Real Problem

Here is the part that actually threatens a house. Purdue Extension notes that wood stacked on the ground can become infested with termites, and that their presence usually is not noticed until the wood gets moved in summer or fall. Carpenter ants work the same seam: Purdue points out that only wood higher than normal in moisture content is susceptible, which is exactly what the bottom row of a pile on bare dirt becomes after one wet Ohio spring.

Ohio's termite is the eastern subterranean termite, and it forages out of the soil. A woodpile resting on that soil a foot from the foundation is a feeding station with a bridge attached. The termites are not interested in your firewood because it is firewood. They are interested because it is cellulose touching dirt, and the next cellulose touching dirt might be a sill plate or a deck post. That is the situation our termite control work is built around, and it is why the first thing a technician looks for outside is wood in contact with soil.

When you move the stack this fall, turn a few of the bottom pieces over and look. Mud tubes the width of a pencil running up the wood, or a network of shelter tubes on the block behind where the pile sat, is worth a free termite inspection before you restack anything.

Do Not Spray The Woodpile

This one is worth saying flatly, because the instinct is strong and the advice is wrong. Purdue Extension states that firewood should not be treated with insecticides. Most products will not penetrate deep enough into the wood to reach what is inside, and storing and then burning treated firewood indoors could be a health hazard, because the insecticide may vaporize into the living area of the home. Purdue also notes there is no practical way to kill the insects once they are already in the wood.

So the answer to a beetle on the carpet is a dustpan, or the fire. Not a can. If a piece is crawling, put it back outside or burn it, and sweep up the bark litter it shed on the way in.

How To Stack It So It Stays Boring

Firewood does not have to be a pest problem. Almost all of the trouble comes from two habits, storing it on soil and storing it against the house. Fix those and the rest sorts itself out.

• Get it off the ground. A rack, rails or pallets break the soil contact that draws termites and keeps the bottom layer wet enough for carpenter ants.
• Move it off the wall. A stack leaning on siding hides the one strip of foundation an inspector most needs to see, and it holds moisture against it.
• Pick a sunny, breezy spot. Wood that dries is wood that nothing wants to nest in.
• Burn the oldest first. Rotating the pile means no piece sits on the bottom for three seasons.
• Carry in a day at a time. The single most useful habit on this list.
• Cover the top, not the sides. A tarp wrapped all the way around traps humidity and makes the pile worse.
• Do not stack in the basement or the attached garage. Both are indoor spaces as far as an emerging beetle is concerned.

Why Ohio Asks You Not To Haul Firewood Around

There is a second reason to buy your wood close to home, and it has nothing to do with your house. Firewood moves tree pests faster than the pests can move themselves. The Ohio Department of Agriculture regulates firewood from all hardwood species inside the Asian longhorned beetle quarantine in Clermont County, where it cannot leave the quarantined area, and the department urges Ohioans to keep buying firewood locally to avoid spreading pests artificially. Guidance from Ohio State University Extension in that county puts it in miles: wood cut more than 50 miles away is too far, and within 10 miles is best.

Spotted lanternfly is the current version of this problem. The Ohio Department of Agriculture issued a statewide quarantine for it on February 17, 2026, and the egg masses turn up in sheltered spots on trees, buildings, outdoor furniture, lawn equipment and firewood. Fall and winter are the right time to look for those grey, waxy patches and scrape them off before they hatch. If you are loading wood for a camping trip out of Stark County, that check takes a minute. We wrote more about what the quarantine means for homeowners in our post on spotted lanternfly in Ohio.

When It Is Worth Having Somebody Look

A beetle on the hearth is not a reason to call anyone. These are: mud tubes on the block or the sill where a pile used to sit, sawdust with insect parts in it under a door frame or a deck rail, large black ants working a trail indoors in the cold months, or wood at the base of a post that gives under a screwdriver. The first points at termites, the middle two at carpenter ants, and the last at whatever got there first.

State Termite has been working on Northeast Ohio houses since 1933, and termite inspections are free in North Canton and across Stark, Summit, Portage, Wayne and Tuscarawas counties. If moving the woodpile turned up something you do not like the look of, send it through our request form or call 330-494-6199 and we will come look before you stack it back.