Small Scale Forensic Thermal Imaging Study

Detailed thermographic surveys and pressure tests were performed on newly completed dwellings on 4 Taylor Wimpey sites, encompassing 3 different external wall types; partial-fill masonry (PF), full-fill masonry (FF) and timber frame (TF). Pressure tests were conducted in accordance with the ATTMA TS1 (2016 Edition) protocol. Thermographic surveys were conducted by an ITC qualified thermographer using a FLIR B620 IR thermal imaging camera. An approach of capturing thermal images both externally and internally, and under natural conditions and under depressurisation, was adopted to avoid misinterpretation of individual thermal images. Comparisons between images were then made to distinguish whether thermal anomalies observed on surfaces were due primarily to thermal conduction through the building fabric or due to air movement beneath those surfaces.