Answer-first
A mud tube is a pencil-width, chocolate-brown shelter tunnel Eastern subterranean termites build to travel from soil to wood without drying out. If you see one on your foundation, pier or interior wall, you have an active colony within 30 feet of your foundation — and the earlier we treat, the cheaper.
When this applies to your East Texas home
- Vertical brown tube on the exterior foundation, running from soil up toward siding
- Tube on the interior side of a pier in the crawlspace
- Tube on the interior wall (rare, indicates advanced infestation)
- Broken tube fragments on the foundation — active colony repairing damage
- Tube hanging from a joist in the crawlspace or basement
- Tube on the exterior of an unattached garage or shed
Failure modes we see in the field
- Knocking the tube down without treating: colony rebuilds in 24–48 hours, and you've destroyed evidence that would guide treatment
- Treating only where you see the tube: the actual colony is 15–30 feet away in the soil — you need a Sentricon monitoring ring or a full liquid termiticide barrier around the entire perimeter
- Assuming a dry tube means the colony is dead: colonies routinely abandon and rebuild tubes based on moisture. Dry now doesn't mean gone
What actually works — the proof
Sentricon Always Active is the gold-standard treatment for East Texas subterranean termites: monitoring stations placed every 10–20 feet around the perimeter, workers find the stations and carry back a growth-regulating bait that eliminates the colony (not just the visible tube). Combined with a written renewable warranty, it's the treatment we recommend and install for 80%+ of active-termite jobs.
Your next step
Found a mud tube? Don't knock it down. Take a photo, note the location and book a free inspection. Our tech uses the tube to identify the colony's likely origin and stage the correct treatment. (936) 632-6464.
Reviewed by the field team
The Spot On Team · Spot On Pest Control
Family-owned in Lufkin, TX · Texas SPCS Business License #License #805260072 · Serving the East Texas Piney Woods since Pawpaw's day.
Frequently asked
Can I just knock the mud tube down myself?
Don't. Two reasons: (1) The tube tells us where the colony is coming from, which shapes treatment placement. (2) The colony rebuilds within 48 hours — knocking down doesn't kill anything and destroys diagnostic evidence. Photograph, don't demolish.
