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?

repaired, it indicates active infestation.

Another sign of activity is termite swarms. These are groups of winged termites that emerge from the colony to mate and start new colonies. If you find discarded wings near windowsills or other entry points, it could suggest a nearby active colony. Listening for faint clicking sounds within the walls, especially at night, can also signal termite activity.

To assess the extent of the damage, start by examining the visible wood in your basement for signs of termite activity, such as hollow-sounding wood, blistering, or visible mazes within the wood structure. Tap on the wood with a screwdriver or similar tool to check for hollowness.

Inspect areas around the foundation, support beams, joists, and subfloor for any signs of weakness or damage. If you suspect extensive damage, it may be necessary to remove sections of drywall or