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?

and termite saliva, creating a protective environment that retains moisture and shields termites from predators.

Typically, these tubes are about 1/4 to 1 inch in diameter and can extend several feet, depending on the distance between the termites’ nest and their food source. They are commonly found on walls, support beams, and other wooden structures, often leading from the ground up to the subfloor of your home. Spotting these tubes is a strong indication that termites are present and potentially feeding on the wood within your home.