Firewood Pests in BC: What’s Hiding in Your Woodpile?

Your Firewood Might Be Bringing Pests Indoors

If you heat your home with wood or enjoy backyard fire pit evenings in Maple Ridge, your woodpile could be hiding more than you think. Firewood is a perfect habitat for a range of insects and arthropods — and when you bring that wood indoors, you risk bringing the pests along with it.

Here’s what’s living in your firewood in BC, how to identify the problem, and how to store wood so pests stay outside where they belong.

Common Firewood Pests in British Columbia

1. Bark Beetles

Small, cylindrical beetles that live just under the bark of freshly cut wood. They’re usually dark brown or black and leave distinctive patterns of small holes and winding galleries on the underside of bark. They’re incredibly common in firewood in BC — almost any piece of wood that still has bark attached may contain bark beetles.

Risk level: Low. Bark beetles feed on dead wood and won’t infest your home’s structural lumber. But when they emerge indoors (which they will, as the wood warms up), they can become a nuisance flying around windows and lights.

2. Carpenter Ants

Firewood piles are one of the most common places to find carpenter ant nests. A woodpile stacked against your house — or even close to your foundation — provides ideal conditions for a satellite colony to establish itself. From there, worker ants can easily forage into your home, and the colony may eventually expand into your walls.

Risk level: High. Carpenter ants can cause significant structural damage over time, and a woodpile is a direct pathway into your home. Never stack firewood against your house.

3. Wood-Boring Beetles (Longhorn Beetles, Powderpost Beetles)

These beetles lay eggs in cracks and crevices of firewood. The larvae burrow into the wood, creating tunnels that weaken the wood structure. They can emerge as adult beetles up to two years after the wood was cut — meaning you may see beetles emerging from firewood stored inside your home long after you brought it in.

Risk level: Moderate. Some wood-boring beetles (like powderpost beetles) can infest hardwood flooring, furniture, and structural wood in your home if given the opportunity.

4. Termites

While less common in firewood than other pests, termite colonies can establish in woodpiles that remain in contact with damp soil for extended periods. Subterranean termites are present in BC’s Lower Mainland, and a woodpile provides both a food source and moisture — everything a termite colony needs.

Risk level: High. A termite infestation is expensive to treat. If termites are in your firewood and your woodpile is against your house foundation, it’s a direct route to your home.

5. Earwigs, Silverfish, and Centipedes

These moisture-loving insects thrive in the damp, dark environment under and between stacked firewood. They won’t damage the wood itself, but they’ll happily move into your home when you bring logs indoors — especially earwigs, which are notorious for appearing from nowhere when you pick up a log from the hearth.

Risk level: Low. Mostly a nuisance, though large centipede infestations can be unsettling.

6. Wasps and Bees

Some species of solitary wasps and bees nest in existing holes in firewood. Yellow jackets may also nest under or inside woodpiles, particularly if the pile provides shelter from rain and predators.

Risk level: Moderate. Stepping on a yellow jacket nest while retrieving firewood can lead to multiple stings.

How to Store Firewood to Prevent Pests

Proper firewood storage is the single most effective way to prevent pest problems. Here’s the BC homeowner’s guide:

1. Keep wood at least 20 feet from your home. This is the most important rule. Pests in the woodpile can’t easily migrate to your house if there’s distance to cross. If 20 feet isn’t possible, keep as much distance as your property allows.
2. Elevate the pile off the ground. Use a firewood rack, pallets, or concrete blocks to keep wood off the soil. Ground contact traps moisture and provides pests direct access. Ideally, the rack should be metal — wood racks can themselves become pest habitats.
3. Cover only the top. A tarp or firewood cover should protect the top of the pile from rain and snow but leave the sides exposed. Wrapping the entire pile traps moisture — pests love damp wood. Good airflow is essential for keeping wood dry and making it less attractive to insects.
4. Store in a sunny, dry location. Pests prefer cool, damp, shady environments. A south- or west-facing location that gets sun for most of the day will naturally repel many wood-dwelling insects.
5. Season wood properly. Green (freshly cut) wood has high moisture content that attracts insects. Wood should be split and stacked for at least 6–12 months before burning. Properly seasoned wood has cracks in the ends and makes a clear ringing sound when two pieces are knocked together.
6. Don’t stack against trees or fences. Pests use these as bridges between the woodpile and other areas of your property.
7. Rotate your stock. Use “first in, first out.” Don’t let wood sit for years without being used. Older wood accumulates more wood-boring insect activity.

Best Practices for Bringing Firewood Indoors

• Only bring in what you’ll burn immediately. Don’t stockpile firewood indoors. A day’s supply (or a few hours’ worth) is all you need.
• Inspect each log before bringing it in. Look for holes in the bark, sawdust on the surface, or visible insects. Tap the log against a hard surface — if beetles emerge, leave the log outside.
• Shake or brush off logs. Dislodge surface insects before carrying wood through your home.
• Use a designated wood box or basket. Don’t stack firewood directly on your floor, hearth, or carpet.
• Burn wood promptly. Don’t let indoor wood sit for weeks. The longer it’s inside, the more likely it is that insects will emerge and disperse into your home.

Is That Insect Infesting My Home or Just My Firewood?

One of the most common concerns we hear is whether firewood insects will infest the home’s structure. Here’s a quick guide:

Pest	Risk to Home Structure	Action Needed
Bark beetles	None — they only eat dead wood under bark	Nuisance only. Vacuum and discard.
Carpenter ants	High — they’ll expand into structural wood	Professional treatment recommended
Powderpost beetles	Moderate — can infest hardwood floors and furniture	Monitor. Call pro if you see fresh frass.
Termites	High — structural damage risk	Professional treatment required
Earwigs / silverfish	None — they’re moisture seekers	Reduce moisture. Remove hiding spots.
Spiders	None — they’re hunting prey in the pile	No action needed (they’re beneficial)

When to Call a Professional

If you suspect carpenter ants, termites, or wood-boring beetles have moved from your woodpile into your home, don’t wait. A professional inspection can determine whether the infestation is still confined to the woodpile or has spread to your home’s structure. Early treatment is always more effective — and less expensive — than dealing with a full-blown structural infestation.

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Canadian Pest Control serves Maple Ridge, Pitt Meadows, Langley, Coquitlam, Port Coquitlam, Port Moody, Surrey, Burnaby, and the entire Fraser Valley. Locally owned, fully licensed and insured since 2012.