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?

Finding a tunnel under the concrete slab of your garden shed can be alarming and puzzling. It’s natural to wonder what animal might be living there while also worrying about possible damage to the structure. Even a small burrow can weaken the base of the shed, and leaving it untreated may eventually lead to cracks or an uneven floor that requires expensive repairs.