Termite Inspection Frequency Calculator

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Termite Inspection Frequency Calculator

Estimate how frequently you should schedule professional termite inspections based on your property's risk profile, construction type, prior history, and geographic termite pressure.

Climate / Termite Pressure Zone

Low – Northern states, cold winters (e.g., MN, MT, ND) Moderate – Midwest / Mid-Atlantic (e.g., OH, VA, KS) High – Southern states (e.g., TX, GA, NC) Very High – Gulf Coast / Southeast (e.g., FL, LA, MS) Extreme – Hawaii / tropical / Formosan termite zones

Primary Construction Type

Concrete slab / steel frame (minimal wood) Wood frame on concrete slab Wood frame with crawl space Full wood frame with basement / wood-to-soil contact

Age of Structure (years)

Prior Termite Activity or Treatment?

No known history Treated more than 5 years ago, no recurrence Treated within last 5 years Active or recurring infestation

Moisture / Drainage Issues on Property?

No – good drainage, dry conditions Minor – occasional pooling or damp areas Moderate – crawl space moisture, leaky gutters Severe – standing water, wet wood, high humidity

Active Termite Treatment / Barrier in Place?

Yes – active bait system with monitoring Yes – chemical soil barrier (within last 5 years) No active treatment

Calculate Inspection Frequency

function terCalc() { // --- Read inputs --- var climate = parseFloat(document.getElementById('ter-climate').value); var construction = parseFloat(document.getElementById('ter-construction').value); var ageRaw = parseFloat(document.getElementById('ter-age').value); var history = parseFloat(document.getElementById('ter-history').value); var moisture = parseFloat(document.getElementById('ter-moisture').value); var treatment = parseFloat(document.getElementById('ter-treatment').value);

// --- Validation --- if (isNaN(ageRaw) || ageRaw 200) { document.getElementById('ter-result').style.display = 'block'; document.getElementById('ter-result').innerHTML = '⚠ Please enter a valid structure age between 0 and 200 years.'; return; }

// --- Age factor --- // Older structures accumulate more wood degradation and hidden entry points. // Factor scales from 1.0 (new) to 1.5 (50+ years). var ageFactor; if (ageRaw = 6.0) { riskLabel = "Extreme"; riskColor = "#c0392b"; urgency = "Immediate professional inspection strongly recommended. Consider ongoing monitoring contract."; } else if (riskScore >= 4.0) { riskLabel = "Very High"; riskColor = "#e67e22"; urgency = "Schedule an inspection as soon as possible and discuss a treatment plan with a licensed pest control professional."; } else if (riskScore >= 2.5) { riskLabel = "High"; riskColor = "#f39c12"; urgency = "Regular inspections are critical. Ensure moisture issues are addressed and consider preventive treatment."; } else if (riskScore >= 1.5) { riskLabel = "Moderate"; riskColor = "#2980b9"; urgency = "Maintain scheduled inspections and monitor for early warning signs such as mud tubes or discarded wings."; } else { riskLabel = "Low"; riskColor = "#27ae60"; urgency = "Continue routine inspections. Maintain good drainage and avoid wood-to-soil contact as preventive measures."; }

// --- Annual cost estimate (rough industry range) --- // Standard inspection: $75–$150. More frequent = higher annual spend. var inspectionsPerYear = 12 / snapped; var annualLow = Math.round(inspectionsPerYear * 75); var annualHigh = Math.round(inspectionsPerYear * 150);

// --- Output --- var html = '### 🐛 Inspection Frequency Results '; html += ''; html += 'Risk Score' + '' + riskScore.toFixed(2) + ''; html += 'Risk Tier' + '' + riskLabel + ''; html += 'Recommended Interval' + 'Every ' + snapped + ' month' + (snapped === 1 ? '' : 's') + ''; html += 'Inspections / Year' + '' + inspectionsPerYear.toFixed(1) + ''; html += 'Est. Annual Inspection Cost' + '$' + annualLow + ' – $' + annualHigh + ''; html += ''; html += '' + 'Recommendation: ' + urgency + '

';

var el = document.getElementById('ter-result'); el.style.display = 'block'; el.innerHTML = html; }

#### Formula

Risk Score = Climate Factor × Construction Factor × Age Factor × History Factor × Moisture Factor × Treatment Factor

Raw Interval (months) = 24 ÷ Risk Score

Recommended Interval = Raw Interval clamped to [3, 24] months, then snapped to the nearest standard interval: 3, 4, 6, 9, 12, 18, or 24 months.

Each factor is a dimensionless multiplier ≥ 1.0 (except the treatment discount factor which can be < 1.0). A higher combined score compresses the inspection interval, reflecting elevated risk.

#### Assumptions & References

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References

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