Arizona termite guide
Ultimate Termite Control & Inspection Checklist for Arizona Homes.
A practical, room-by-room and yard-by-yard termite inspection checklist for Gilbert and Phoenix metro homeowners, real estate agents, and home inspectors. Subterranean termites do not care how new or how clean a slab-on-grade home looks — they care about moisture, wood-to-soil contact, and small openings. This guide walks through what to look for, what real activity actually looks like, and when to stop checking and call a licensed termite technician.
Why it matters
Why termite inspection matters in Arizona
Arizona homes do not get a winter break from termites. Subterranean termites are active year-round in Gilbert and the Phoenix metro because the soil stays warm enough for foraging through almost every month of the year. That is very different from cold-climate states where seasonal dormancy gives homeowners a natural pause.
Slab-on-grade construction dominates the East Valley, and it has its own termite vulnerabilities: expansion joints, plumbing penetrations, garage stem walls, and any place stucco or wood trim touches soil. Termite damage compounds quietly behind walls, which is why a routine inspection is almost always cheaper than waiting for visible damage.
Exterior
Exterior inspection checklist
Most termite evidence shows up outside before it shows up inside. Walk the full perimeter of the home slowly, ideally in good daylight, and check each item below. Move pots, planters, and stored items back a few inches so you can see the wall clearly.
- Slab edges — look for mud tubes climbing the wall or running along the concrete-stucco line.
- Stem walls and garage stem walls — common entry route in slab homes.
- Expansion joints in driveways, garage floors, and patio slabs adjoining the house.
- Patio additions where new slab meets the original foundation.
- Stucco-to-soil contact — the single most common Arizona termite vulnerability.
- Plumbing, AC, and electrical penetrations through the foundation.
- Hose bibs, exterior faucets, and any chronic moisture sources against the wall.
- Irrigation transitions where drip lines or sprinklers wet the foundation perimeter.
- Downspouts and roof runoff that channel water against the foundation.
- Soil grading — soil should slope away from the home, not toward it.
- Foundation cracks wider than 1/16 of an inch.
- Wood trim, fascia, or eaves close to the ground or to wet surfaces.
Interior
Interior inspection checklist
Inside, focus on the rooms closest to the exterior walls and any room with plumbing. Bring a flashlight, a screwdriver for tapping wood, and pay attention to anything that does not feel solid or look uniform.
- Window sills and window frames — tap for hollow sound, look for blistered paint.
- Door frames, especially interior side of the garage door frame.
- Baseboards in laundry rooms, kitchens, bathrooms, and garage interiors.
- Hollow-sounding wood when tapped firmly with a screwdriver handle.
- Bubbling, blistering, or unexplained peeling paint on walls or trim.
- Sagging floors or floors that flex when stepped on.
- Buckling laminate, hardwood, or tile near exterior walls.
- Cabinets along exterior walls — open and check the back panels for staining or evidence.
- Garage walls and the garage ceiling-wall joint.
- Attic access edges and any visible structural wood you can safely reach.
Yard & perimeter
Yard and perimeter checklist
The yard is where conditions are made. Many termite problems start with a woodpile, mulch bed, or fence post acting as a stepping stone from soil to structure. These items are easier to fix early than to chase after termites have already moved in.
- Firewood, lumber, or pallets stacked against or near the house.
- Wood mulch piled within 6 inches of the stucco or foundation.
- Tree stumps and decaying root systems within 20 feet of the home.
- Dead trees, fallen branches, or rotting wood debris.
- Wood sheds, playhouses, or outbuildings with sill plates touching soil.
- Wood fence posts set directly in soil (especially older fence lines).
- Decking, pergolas, and patio structures with wood-to-soil contact.
- Wooden landscape borders, raised beds, and planter boxes near the foundation.
- Crawl space access (rare in AZ) — check for mud tubes on piers and sill plates.
Active signs
Signs of active termite activity
Some evidence shows old, repaired damage. Other evidence shows termites are present right now. Any of the items below means it is time to involve a licensed termite technician.
Mud tubes
Pencil-width tubes of dirt, saliva, and fecal material running up foundation walls, slab edges, plumbing, or interior walls. Tubes may be broken, branched, or freshly active — break a small section and check back in a week to see if the termites repair it.
Live swarmers
Winged reproductive termites are about 3/8 inch long with two equal-length wings. They appear inside or near windows after warm spring or monsoon rains and are often mistaken for flying ants.
Discarded wings
Piles of small, equal-sized wings near window sills, door thresholds, or interior lights are a sign swarmers have already entered the area.
Hollow or blistered wood
Subterranean termites eat wood from the inside out and along the grain. Tapping reveals a hollow sound, and damaged areas may show as raised, blistered paint.
Damaged drywall and baseboards
Pinholes, fine cracks, or sagging in drywall and baseboards along exterior walls can indicate active feeding behind the surface.
Real estate
Real estate & WDI inspection checklist
For buyers, sellers, realtors, and home inspectors, the termite piece of a transaction has its own checklist. The Wood Destroying Insect (WDI) report is a separate document from the standard home inspection, and treating it as an afterthought is how deals slow down at closing.
- Timing — schedule the WDI inspection inside the option period; do not wait until closing week.
- Lender requirements — confirm whether the lender requires a clear WDI report or accepts notes with treatment.
- Treatment guarantee — if treatment is recommended, ask about the warranty length, what it covers, and whether it transfers to future owners.
- Pre-treatment records — request any pre-construction treatment documentation from the seller or builder.
- Renewable bonds — for older homes, ask whether a renewable termite bond exists and is current.
- Active vs. past evidence — confirm whether findings show active termites or only old, repaired damage.
- Documentation — get findings in writing with photos and a clear next-step recommendation, not verbal-only.
- Re-inspection — if treatment happens during the transaction, plan for a follow-up inspection within the warranty period.
When DIY stops
When to stop DIY and call a pro
Stop the DIY checklist and call a licensed termite technician when you see any of the following: active mud tubes anywhere on the structure, live swarmers or piles of discarded wings inside the home, wood that sounds hollow or shows tunneling when probed, or any visible damage at wood-to-concrete transitions. These all indicate live colony activity that consumer products will not reach.
You should also bring in a pro for pre-purchase peace of mind, before a remodel that opens up walls or slab edges, and any time a previous inspection report shows past evidence but no recent confirmation. Termite work is one of the few areas where the cost of inspection is almost always smaller than the cost of waiting.
Frequency
How often to inspect
New build
First inspection within 12 to 18 months after pre-construction treatment, then on a regular rotation.
Most AZ homes
Every one to two years is a reasonable baseline if no active history.
Older homes
Annually for homes 20 years and older without a recent inspection record on file.
After changes
After remodels, re-grading, or major irrigation changes that alter the soil-to-structure relationship.
Where termite pressure runs hot
Gilbert neighborhoods worth inspecting on a tighter schedule
Construction style and irrigation patterns make termite pressure higher in some Gilbert neighborhoods than others. These four feature termite treatment as a primary or strong-secondary recommendation.
See the full termite treatment service or the Gilbert termite treatment page.
Common questions
Termite inspection FAQs
What kind of termites do Arizona homes have?
Subterranean termites are the species that matter for Gilbert and the Phoenix metro — primarily Heterotermes aureus and Reticulitermes hesperus. They live in the soil, move through mud tubes about the width of a pencil, and target wood that touches or sits close to the ground. Arizona also has drywood termites in some areas, but subterranean activity is by far the most common concern in slab-on-grade East Valley homes.
When do termites swarm in Arizona?
Subterranean termite swarmers usually appear after warm spring rains, typically March through May, and can show up again after late-summer monsoon storms. Finding live winged termites or piles of discarded wings inside the home is one of the clearest signs of nearby activity and warrants a professional inspection.
Can termites damage a slab-on-grade home?
Yes. Slab-on-grade is the dominant construction style in Gilbert and most of the East Valley, and subterranean termites still find entry through expansion joints, plumbing penetrations, slab edges, garage stem walls, and any place wood trim or stucco touches soil. They do not need a crawl space — they need a moisture path from soil to wood.
How often should an Arizona home be inspected for termites?
Every one to two years is a reasonable baseline for most Arizona homes. Newer builds should be inspected within the first 12 to 18 months after pre-construction treatment. Older homes (20+ years) without a recent inspection record should be checked annually. After remodeling, re-grading, or major irrigation changes, schedule a fresh inspection.
Does Firehouse provide WDI reports for real estate transactions?
Yes. Firehouse can complete a Wood Destroying Insect inspection for purchase or refinance transactions in Gilbert and the surrounding Phoenix metro, document findings with photos, and explain what the report does and does not warrant. We coordinate with realtors, inspectors, and lenders within the option period when timing is tight.
Are termite treatments safe around kids and pets?
Firehouse uses EPA-registered termiticides applied by trained, licensed technicians. Once treated areas are dry and any soil applications have settled, the home is designed to be safe for kids and pets. If a treatment requires specific preparation or temporary access restrictions, the technician will explain it clearly before the work starts.
Take control today
Want Firehouse to inspect it instead?
If anything in this checklist describes what you are seeing, tell Firehouse the property, the area where you saw it, and the timing. A licensed technician will walk the inspection, document findings with photos, and explain what treatment, if any, the home actually needs.