Something keeps tunneling under the concrete slab of my garden shed. I’ve filled it in, but every morning it’s back—and I’m worried it could damage the foundation. What would you do?

Discovering a hidden tunnel beneath your garden shed’s concrete slab can be stressful and confusing. It’s normal to feel both curious about what’s living there and concerned about the safety of your shed. Even a small tunnel can weaken the foundation, and ignoring it could lead to costly repairs for a cracked or sinking floor. This guide walks you step-by-step through handling the problem. You’ll learn how to identify the animal, protect your property, and prevent future damage. 1. Confirm Which Animal Is Digging First, identify who’s causing the trouble. Groundhogs (or woodchucks) are expert diggers, often leaving tunnels 6–12…