Non-invasive methods for assessing the performance of architectural envelopes

Abstract

Contemporary architectural practice is characterized by the pursuit of high levels of energy efficiency, which results in the application of complex calculation methods and performance simulations during the design of buildings. Simultaneously, the construction process and, especially, the certification of completed buildings are generally much less controlled, and performance verification is typically conducted only when noticeable deficiencies are identified. The need to develop a methodology that would enable adequate diagnostics of the condition and determination of the degree of deviation from desired performance has led to an approach based on the combination of two non-invasive investigative methods: infrared imaging and heat flux measurement. When properly applied, these methods can accurately determine actual performance. This paper presents the application of an investigative procedure based on the combination of these methods in real life conditions, where various levels of deficiencies have been identified and quantified, having extremely negative consequences on the performance of buildings and compromising the basic comfort conditions for users.