People assume the desert is too dry for termites. Phoenix proves otherwise. Irrigation, swimming pools, leaking plumbing and the damp soil beside a house create small oases, and the desert subterranean termite uses them to reach structural wood without ever being seen.
The species behind most Valley damage
The desert subterranean termite is the main culprit in the Phoenix area. Colonies live in the soil, travel through narrow mud tubes, and enter homes through slab cracks, expansion joints, and utility penetrations. Drywood termites occur at lower levels in parts of the Valley, often in older wooden structures, pergolas and furniture. Formosan termites are not a concern in this desert climate. Arizona's mild winter means foraging continues for much of the year, with swarms often following monsoon rains.
Why stucco block homes still get termites
Many Phoenix houses are concrete block with stucco, which seems termite-proof. But the roof framing, interior trim, window frames, doors and cabinets are wood, and termites reach them through gaps in the slab and hollow block cells. Homes built on concrete slabs have no crawl space, so there is no easy visual inspection point. Established neighborhoods such as Arcadia, Encanto, Willo and the Coronado district contain older homes whose original slabs have shifted and cracked over decades.
Signs to watch for
- Thin mud tubes on the outside of stem walls, in the garage, or inside block-wall cavities.
- Winged termites near windows and doors after summer storms.
- Baseboards or door frames that feel hollow or look swollen.
- Small holes in drywall or paint that bubbles near a wall base.
- Termite wings on window sills or near light fixtures.
Inspection and treatment
A licensed provider examines the slab perimeter, garage, attic, wood trim, patio posts, and areas near irrigation, pool equipment and water heaters. Treatment for subterranean termites is typically a liquid soil treatment around the foundation, sometimes with drilling at patio slabs and garage floors, or bait stations. Because slabs and hardscape cover so much soil around Phoenix houses, the technician's access plan is a big part of the job. Arizona requires licensed applicators for structural termite work, and a written treatment record is typically provided.
If you are buying a house, a wood-destroying insect inspection is a normal step in many transactions, and it can uncover old treatment history.
Prevention suited to the Valley
- Keep irrigation and drip lines from soaking the base of walls.
- Repair plumbing and water heater leaks promptly, even slow ones.
- Avoid storing wood, cardboard or lumber against exterior walls.
- Keep soil and decorative rock from piling against stucco above the weep screed.
- Inspect pergolas, fences and posts that touch the ground.
What happens when you call
PestMinistry is a referral service, not a termite company. Call (844) 725-1661 and we will connect you with an independent licensed provider in our network who handles termite control in Phoenix. The provider inspects, recommends treatment and carries it out.
Termite questions in Phoenix
Can termites live in such dry soil?
They need moisture, and Phoenix yards provide it through irrigation, pools and plumbing leaks near foundations.
When do termites swarm in Arizona?
Often after summer monsoon rain, though timing varies by species and neighborhood.
Is a stucco house safer?
Not really. The stucco shell conceals activity, and the wood inside is still vulnerable.
How often should I inspect?
Many owners schedule yearly inspections. A provider can suggest a timeline based on your home's history.