Infrared Thermography
Thermal Imaging for Subsurface Defect and Moisture Detection
Overview
Infrared thermography detects subsurface defects by measuring surface temperature variations caused by differences in thermal conductivity. Delaminations, voids, moisture ingress, and insulation defects all produce characteristic thermal signatures invisible to the naked eye.
The technique works because subsurface defects alter heat flow through structural elements. Delaminations trap air causing warmer surfaces; moisture-saturated zones have higher thermal mass appearing cooler during drying phases. Modern thermal cameras detect contrasts as small as 0.05°C.
IRT is particularly valuable for facade assessment — large areas surveyed from ground level without scaffold. A thermal survey of a building facade that would require days of scaffold-based inspection can be completed in hours.
SiteOps conducts IRT surveys under controlled thermal conditions with thermography-trained structural scientists who understand both the thermal physics and structural implications.
Applications
Facade Delamination Detection
Identifying tile, render, and cladding delamination from ground level.
Moisture Ingress Mapping
Detecting moisture migration paths through walls, roofs, and slabs.
Insulation Deficiency
Locating missing or damaged thermal insulation in building envelopes.
Electrical Fault Detection
Identifying overheating electrical connections and switchboards.
Post-Repair Verification
Verifying bond quality of facade repairs through thermal comparison.
Technical specifications
| Detector Resolution | 640×480 pixels minimum |
|---|---|
| Thermal Sensitivity | <0.05°C (50mK NETD) |
| Temperature Range | -20°C to +650°C |
| Survey Conditions | Min 10°C ambient differential ideal |
| Standards | AS 4964, ASTM C1060, ISO 6781 |
Related technologies
Related services
FAQ
Common questions
Can IRT detect all structural defects?+
No — IRT detects defects producing thermal anomalies. It cannot detect reinforcement corrosion or concrete strength variation. SiteOps uses IRT as a screening tool.
What weather conditions are needed?+
Clear skies, low wind (<15 km/h), and solar heating or cooling phases for maximum thermal contrast.
Deploy IRT on your asset
Share drawings, exposure conditions, and programme constraints — we will propose an investigation scope aligned to Australian standards and your risk profile.
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