Woodlice are terrible door-to-door salesmen. They don’t knock. They just crawl in through cracks. Seal gaps around windows and doors with caulk. It’s cheaper than therapy.
How to Get Rid of Woodlice | BBC Gardeners World Magazine
Check the bottom of your exterior doors. A quarter-inch gap is an open invitation to a woodlouse parade. Install a door sweep. It’s like a velvet rope at a club—you’re not on the list, buddy.
You can also sprinkle diatomaceous earth around entry points. It’s a powder made from fossilized algae. To a woodlouse, it’s like walking across a thousand tiny broken glass shards. They dry out and die. It’s grim but effective.