I found these weird dirt tunnels running up the support beams in my basement. I poked one and it crumbled, but it looks like they go all the way to the subfloor. Is this serious?

structure.

Before calling in a professional, you can conduct a preliminary inspection to gather information about the infestation. Begin by inspecting all wooden structures in your basement, including beams, joists, and support posts, for signs of damage.

Use a flashlight and a flathead screwdriver to probe suspicious areas, listening for hollow sounds or finding weakened wood. Document your findings with photographs and notes, which can be useful for a pest control professional to assess the situation and determine the best course