Unexposed Slab Edge (Termite Risk)
Unexposed Slab Edge (Termite Risk) is a high-severity termite defect SURE inspectors have documented across 254 inspection reports. Highest concentration in Ellenbrook.
Causes
- Landscaping/construction practices (paths, paving, garden beds, soil against slab)
- Slab edge covered by external elements (paths/paving/garden vegetation or soil)
- Potential for improper sealing around plumbing penetrations through the slab
- Slab edge covered by landscaping (paths, paving, garden vegetation, soil)
- Covered slab edge by paths, paving, garden vegetation, or soil
Symptoms to look for
- Potential for undetected termite access and extensive damage to concealed framing timbers
- Direct soil-to-timber contact provides conducive conditions for termites and decay
- Inability to visually inspect the slab edge for termite activity or weeps
- Slab edge not visible for inspection (less than 75mm exposed)
- Inability to inspect slab edge for weeps and pest ingress
Remedies
- Expose the slab edge a minimum of 75mm (by excavation or removal of obstructions) so that a thorough inspection can be conducted for any termite infestation/entry points
- Expose slab edge a minimum of 75mm so that a thorough inspection can be conducted for any termite infestation/entry points
- The slab edge must be exposed a minimum of 75mm to allow for thorough inspection for termite activity/entry points
- Ensure all plumbing and drains passing through slabs are properly sealed to prevent termite entry
- Expose the slab edge a minimum of 75mm to allow a complete inspection of any termite entry points
Where we see this most
These suburbs show the highest concentration of unexposed slab edge (termite risk) in our inspection data (minimum five observations). Click a suburb to see its full defect profile.
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Findings in this category skew high severity. If you are under contract, we can usually book inside the cooling-off window. Every inspection includes 12 months of free advice.
Curated entries in Termite
- Curated 2–4/5Slab Edge Concealed by Soil, Paving, or Raised Garden Beds
I walked the perimeter and could not see a continuous strip of exposed slab edge - raised garden beds, soil, paving, or decorative stone have buried it. Reference: AS 3660.1 and AS 3660.2. In my experience a concealed slab edge lets subterranean termites bridge the edge barrier out of sight, entering the cavity or framing without leaving mud leads where I can find them.
- Curated 1–4/5Mulch and Garden Beds Against House
Organic mulch and irrigated garden beds placed directly against the external walls create a moisture-rich, cellulose-rich environment that is attractive to subterranean termites and conceals the slab edge from visual inspection. AS 3660.1 and AS 3660.2 identify direct contact between landscaping materials and the structure as a conducive condition requiring correction.
- Curated 1–5/5Timber in Contact with Ground
Timber structural elements - deck posts, pergola framing, sleeper retaining walls, or firewood stacks - sitting directly in or against soil create an unobstructed termite pathway into the building and accelerate fungal decay. AS 3660.1 requires all structural timber to be isolated from soil to maintain a visible inspection zone; ground contact eliminates this requirement entirely and removes any chance of early detection.
- Curated 1–4/5High Termite Risk Due to Environmental Surrounds
The property's location near large trees, bushland, or parkland places it in elevated termite territory. Proximity to established timber sources and native vegetation significantly increases foraging pressure on nearby structures, and AS 3660.1 recognises environmental context as a primary risk factor when specifying termite management requirements.
- Curated 1–4/5Concealed Internal Wall Areas (Termite Risk)
Internal wall cavities, top plates in the roof space, and sub-floor framing cannot be visually inspected during a standard building inspection. AS 4349.3 requires inspectors to report whenever access limitations prevent verification of timber condition - these concealed zones are where termite activity most commonly goes undetected until structural damage is advanced.
- Curated 1–4/5Tree Stumps on Site
Tree stumps left in the ground provide an established food source and potential nesting site for subterranean termites. Once a colony is established in a stump, foraging extends radially - typically 50–100 m - placing any timber-framed structure on the property within reach.