How To Get Rid Of Wood Lice In The House

So, you’ve spotted a little grey, armored-looking critter scurrying across your bathroom floor at midnight. Don’t panic—it’s just a wood louse, also known as a pill bug or roly-poly. These tiny tank-like creatures aren’t here to hurt you; they’re more like clumsy little house guests who got lost on their way to the garden party.

Think of wood lice as the vacuum cleaners of the insect world—they mostly munch on decaying leaves and damp wood outside. But when they wander indoors, it’s a sign that your home has something they love: moisture. And that’s why you should care—where there’s moisture, there might be bigger problems like mold or rot hiding behind your baseboards.

Why They Crash on Your Couch

Wood lice are basically little humidity detectors with legs. If your basement smells like a damp towel or your bathroom has a leaky pipe, you’re rolling out the red carpet for them.

I once found a whole squad of them behind a potted plant that I’d been overwatering. They weren’t being rude—they were just thrilled to find a rainforest in my living room. Your job is to make your home feel less like a tropical getaway and more like a dry, crisp autumn day.

Step 1: Stop Feeding Them (Even by Accident)

Remove their buffet. Wood lice don’t eat your furniture, but they do feast on moldy leaves, old mulch, and damp cardboard. If you have a stack of wet newspapers in the garage, toss them. That pile of firewood next to the back door? Move it outside, away from the house.

Think of it like leaving a pizza box open in your living room—someone’s going to show up. Seal up any damp organic matter, and they’ll lose interest fast. Out of sight, out of stomach.

Step 2: Play Moisture Detective

Grab a flashlight and start looking for water mischief. Check under the sink, around the toilet, and near the washing machine—anywhere a drip could hide. A leaky faucet is like a free water fountain for them, and they’re not shy about using it.

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I once fixed a tiny drip under my kitchen sink and the wood lice vanished within a week. No drip, no problem. If you have a crawl space, make sure it’s well-ventilated. Running a dehumidifier is like telling them, “Sorry, the spa is closed.”

Gentle Eviction (No Tiny Brooms Required)

If you already have a few scuttling around, don’t squash them—they’ll just leave a little gray smear. Instead, sweep them up gently and release them outside near a compost pile or under a rock. They’re actually good for your garden, eating dead stuff and aerating the soil.

Or you can use diatomaceous earth (a white powder that’s harmless to you but feels like broken glass to their little legs). Sprinkle it along baseboards and under sinks. It’s like setting up a velvet rope that says, “Sorry, you’re not on the list.”

Step 3: The Great Seal-Up

Wood lice are tiny, but they’re not magicians. They get in through cracks gaps around doors, windows, and pipes. Caulk is your best friend—run a bead along gaps in the foundation or around window frames. It’s like putting a cozy sweater on your house, but instead of warmth, you’re blocking creepy-crawlies.

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Don’t forget the weather stripping on your exterior doors. If you can slide a piece of paper under the door, a wood louse can definitely waltz in. Seal the deal.

When It’s Time to Call Backup

If you’ve done all this and they’re still showing up in droves, you might have a hidden moisture problem like a leak inside a wall. In that case, call a pest control pro—they have tools and ideas that go beyond my “sweep and hope” method.

But let’s be honest: most of the time, a little tidying and drying is all you need. Wood lice aren’t villains; they’re just clumsy explorers. Treat them like that friend who always forgets where they parked—gently guide them back outside.

A Final Warm Thought

Next time you see one, smile and remember: they’re not judging your laundry pile. They’re just looking for a drink of water. You’ve got this. With a dry towel, a tube of caulk, and a sense of humor, your home can be wood-louse-free in no time—and you’ll have a drier, happier space to boot.