Termites and Hardscape: What Concrete, Brick, and Pavers Mean for Termite Risk
About the Author: Jameson Elam is the owner and operator of Good Sense Termite, serving Alameda, Santa Clara, San Mateo, and Santa Cruz counties. With over 14 years of hands-on experience in the termite control industry, Jameson specializes in thorough inspections, accurate diagnostics, and long-term solutions tailored to California homes. His deep knowledge of local termite behavior and building structures has made Good Sense Termite a trusted name for homeowners and real estate professionals alike.
Concrete driveways, brick patios, paver walkways, and stone retaining walls are popular features in Bay Area homes — and they give many homeowners a false sense of termite security. The thinking goes: termites eat wood, not concrete, so hardscape must protect against them.
Unfortunately, it's not that simple. Hardscape doesn't stop subterranean termites — and in some cases, it actually complicates termite detection and treatment. Here's what Bay Area homeowners with significant hardscape need to know.
Termites Don't Eat Concrete — But They Go Through It
Subterranean termites are remarkably resourceful when it comes to reaching wood. They don't eat concrete, brick, or stone — but they don't need to. They exploit gaps, cracks, expansion joints, utility penetrations, and any other opening in hardscape to reach the soil beneath and the wood above.
In practice, this means:
Concrete slabs are not termite barriers.
Subterranean termites can travel through cracks as narrow as 1/32 of an inch — smaller than a grain of rice. A concrete slab that has developed hairline cracks from settling or thermal expansion provides multiple potential pathways. Expansion joints and control joints in concrete — the deliberate gaps built into concrete to allow for movement — are particularly common termite access points.
Pavers and brick create gaps by design.
Paver patios and brick walkways have gaps between individual units — filled with sand, gravel, or polymeric sand — that provide direct pathways from the soil below to the surface. Subterranean termites traveling through the soil beneath a paver patio have numerous access points to reach any wood that sits at or above paver level.
Mortar joints in brick and block deteriorate over time.
Older brick foundations, retaining walls, and exterior surfaces develop gaps as mortar weathers and cracks. Each gap is a potential termite entry point.
How Hardscape Affects Termite Detection
Beyond the access question, hardscape creates a specific challenge for termite detection: it conceals what's happening at and below the soil surface.
Mud tubes are harder to spot.
Subterranean termites build mud tubes to travel between soil and wood. On an open foundation wall or crawl space pier, mud tubes are visible and detectable during inspection. But when a concrete patio or paver surface covers the foundation perimeter, any mud tube construction happening beneath the hardscape is out of sight — often only discovered when the termites emerge above the hardscape level or when significant damage has already occurred.
Soil conditions beneath hardscape are different.
Hardscape surfaces trap moisture and prevent evaporation from the soil beneath. The soil under a concrete patio or paver walkway that never fully dries out is consistently hospitable to subterranean termites — more so than surrounding soil that dries out between rain events. This is a significant factor in homes where extensive hardscape covers the foundation perimeter.
Inspection access is limited.
A termite inspector can visually assess what they can see — but a large concrete patio covering the foundation perimeter limits what can be observed from the exterior. Inspectors note inaccessible areas in the WDO report, which means a thorough interior crawl space inspection becomes even more important for homes with extensive hardscape.
Specific Hardscape Scenarios and Their Risks
Concrete Patios Adjacent to the Foundation
A concrete patio poured against the home's foundation — particularly one that covers the foundation perimeter and any soil-to-wood transition areas — creates both an access challenge and a detection challenge. Cracks and expansion joints in the patio surface give subterranean termites pathways from the soil below to the structure above, while the patio's surface coverage makes exterior inspection difficult.
What to watch for: Any visible mud tube emerging above the concrete surface near the foundation, soft spots or hollow sounds in interior flooring adjacent to the patio area, or unexplained moisture in the crawl space beneath a concrete-covered foundation section.
Paver Patios and Walkways
Pavers installed over compacted gravel and sand provide a particularly accessible environment for subterranean termites — the permeable base allows for soil moisture retention, and the gaps between pavers offer multiple surface access points. Pavers that butt directly against wood deck framing, siding, or exterior door thresholds are a particular concern.
What to watch for: Termites or mud tubes visible in the gaps between pavers near wood structures, frass near the base of exterior wood elements adjacent to paver areas, or soft spots in any wood framing that touches or sits close to the paver surface.
Concrete Driveways and Garage Floors
Garage slabs and driveways are common subterranean termite entry points in Bay Area homes — particularly when the garage contains wood framing, shelving, or stored lumber that sits at or near slab level. Cracks in garage slabs, the gap between the slab and the garage wall framing, and any utility penetrations through the slab are all potential access points.
What to watch for: Mud tubes emerging from cracks in the garage slab, along the gap where the slab meets the wall framing, or near any plumbing or electrical penetrations through the concrete floor.
Brick and Stone Retaining Walls
Retaining walls adjacent to the home — particularly those with deteriorated mortar joints — can provide pathways for subterranean termites to travel from the higher soil level behind the wall to the structure above. Wood elements embedded in or resting against retaining walls are particularly vulnerable.
What to watch for: Mud tubes on the face of retaining walls near wood elements, deteriorated mortar joints that provide direct soil-to-surface pathways, and any wood structural elements in contact with the wall surface.
How Hardscape Affects Termite Treatment
When subterranean termite treatment is needed in a home with extensive hardscape, the hardscape creates a practical challenge for liquid soil treatment — the standard and most effective approach.
Liquid soil treatment requires applying termiticide to the soil along the foundation perimeter and beneath the structure. When concrete, pavers, or brick cover that perimeter, alternative application methods are needed:
Drilling through hardscape. In many cases, holes can be drilled through concrete or paver surfaces at regular intervals to inject termiticide into the soil below. The holes are then filled and patched after treatment. While effective, this approach requires more labor and leaves minor patching marks on hardscape surfaces.
Treating through accessible gaps. Paver installations with accessible gaps between units may allow injection through the joint material rather than requiring drilling through the pavers themselves.
Treating from the interior. For slab foundations, termiticide can sometimes be applied through the interior — drilling through interior concrete to reach soil beneath — complementing exterior perimeter treatment.
This is why disclosing hardscape conditions to your termite inspector matters: it helps them plan the most effective treatment approach for your specific property before work begins.
What Homeowners with Extensive Hardscape Should Do
Include hardscape in your annual inspection conversation. Let your termite inspector know about any significant concrete, paver, or brick surfaces adjacent to your home's foundation. This helps them allocate inspection time appropriately and flag any inaccessible areas in their report.
Pay attention to the crawl space. For homes where hardscape limits exterior inspection, the crawl space becomes the primary detection zone for subterranean termite activity. A thorough crawl space inspection is particularly critical.
Watch for surface signs above hardscape. Mud tubes that emerge above concrete or paver surfaces are a clear sign of subterranean termite activity. Any brown tube — even a thin one — appearing at the surface of hardscape near a wood element warrants an inspection call.
Address cracks and gaps in hardscape promptly. Caulking or sealing cracks in concrete, repointing deteriorated mortar joints in brick, and refreshing polymeric sand in paver joints reduces accessible entry points for subterranean termites.
The Bottom Line
Hardscape doesn't protect your home from subterranean termites — and in some ways it makes termite activity harder to detect and treatment more complex. Bay Area homeowners with significant concrete, paver, or brick surfaces adjacent to their foundation benefit from annual inspections that specifically account for hardscape conditions and from paying close attention to any surface signs that emerge above hardscape level.
Call or text Good Sense Termite at (408) 418-9152 or request your free inspection online. We'll assess your home thoroughly — hardscape and all — and give you a clear picture of your termite risk.
It's just good sense.
Frequently Asked Questions: Termites and Hardscape
Can subterranean termites get through concrete?
Subterranean termites cannot eat through concrete, but they don't need to. They exploit cracks, expansion joints, utility penetrations, and gaps as narrow as 1/32 of an inch to travel from soil to wood. A concrete slab with hairline cracks or expansion joints provides multiple potential termite pathways regardless of its overall condition.
Do pavers attract termites?
Pavers don't directly attract termites, but paver installations create conditions that favor subterranean termite activity. The permeable base beneath pavers retains moisture, the gaps between units provide soil access points, and the covered soil rarely dries out fully — all conditions that subterranean termites find hospitable. Pavers adjacent to wood framing or siding are a particular concern.
How do termite inspectors assess homes with extensive concrete or paver coverage?
Inspectors document inaccessible areas in the WDO report — surfaces covered by hardscape that can't be directly observed from the exterior. For homes with extensive hardscape, the crawl space inspection becomes the primary detection zone for subterranean termite activity. Inspectors also check for any mud tubes that have emerged above the hardscape surface near wood elements.
Does concrete hardscape make termite treatment more difficult?
Yes, in some cases. Liquid soil treatment — the standard approach for subterranean termites — requires access to the soil along the foundation perimeter. When concrete covers that perimeter, drilling through the hardscape at regular intervals may be needed to inject termiticide into the soil below. Disclosing hardscape conditions to your termite company before treatment allows them to plan the most effective approach.
What are the signs of termite activity in a home with a concrete patio or paver surface?
Key signs include mud tubes emerging above the concrete or paver surface near the foundation or adjacent wood elements, frass near the base of exterior wood touching or adjacent to hardscape, soft spots or hollow-sounding flooring in interior areas adjacent to concrete-covered foundation sections, and unexplained moisture in the crawl space beneath hardscape-covered areas.
Should I seal cracks in my concrete to prevent termites?
Yes — sealing cracks and expansion joints in concrete, repointing deteriorated mortar in brick, and refreshing polymeric sand in paver joints reduces the number of accessible entry points for subterranean termites. While these measures don't eliminate termite risk entirely, they meaningfully reduce the pathways available and are worth incorporating into routine home maintenance.
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