Found these strange dirt-like veins running up my basement wall. They crumble when touched but seem hollow inside. Do I have a leak or something else?

light fixtures, which are a sign of termite swarming. Additionally, damaged wood that sounds hollow when tapped or has a papery texture can indicate termite activity.

If you find piles of what looks like sawdust, these could be termite droppings, known as frass. Unlike water damage, termite damage often appears in irregular patterns and lacks the water stains or mold growth associated with leaks.

Performing simple at-home tests can help confirm the presence of termite mud tubes. Gently break open a