Assessment of Thermal Bridging Heat Loss by Means of the Infrared Thermography Technique

  • Małgorzata O’Grady
  • Agnieszka A. Lechowska
  • Jacek A. Schnotale
  • Annette M. Harte
Conference paper
Part of the Springer Proceedings in Energy book series (SPE)


Thermal bridges influence the thermal standard of a building envelope. They are taken into account in the linear thermal transmittance or Ψ-value, and can be estimated from tabulated values for standard building details or from numerical modelling. However, these methods are not applicable for existing buildings with unknown structure. In these cases, in situ measurement of the Ψ-value is necessary. In this study, a methodology to measure the actual thermal bridging performance is developed. The methodology is based on a infrared thermography technique, which can be used on any existing thermal bridge. To ensure high accuracy, temperature-dependent surface heat transfer coefficients are calculated using the surface temperatures recorded by the infrared camera. The methodology has been validated under steady state conditions in a hot box apparatus with very good agreement.


Building envelope Hot box Quantitative thermography technique Thermal bridging 



Financial support acknowledgment to Enterprise Ireland, Innovation Voucher IV-2014–4203 and College of Engineering and Informatics, National University of Ireland, Galway, Postgraduate Scholarship.

The authors would like to thank SIP Energy Ltd., Athenry Co. Galway, and particularly John Moylan, for delivery of the test specimens.


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Małgorzata O’Grady
    • 1
  • Agnieszka A. Lechowska
    • 2
  • Jacek A. Schnotale
    • 2
  • Annette M. Harte
    • 1
  1. 1.Civil Engineering DepartmentNational University of Ireland GalwayGalwayIreland
  2. 2.Department of Environmental EngineeringCracow University of TechnologyCracowPoland

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