•Vision-based 3D scanning techniques,•Determining measurement uncertainty and acceptance level,•Examination of large-surface objects with rough surfaces,•Application of numerical analysis and engineering inspection,•Laboratory tests of External Thermal Insulation Composite Systems (ETICS) Measuring the deformation of large-area objects with non-uniform rough textures using traditional techniques is technically challenging and time-consuming. This article presents a comprehensive solution that enables the precise measurement of the deformation of large-area elements of external thermal insulation composite systems (ETICS). The laboratory tests for environmental resistance were conducted in a climatic chamber. The surface of the wall underwent irregular deformation owing to thermal and humidity cycles. The deformation state at different stages of exposure was recorded using 3D scanning techniques. Scanning results were paired using a simplified cause-effect graph, and the deformation was measured by engineering inspection. Evaluation criteria were developed using measurement uncertainty and a straightforward binary acceptance principle. Finally, compliance tests were performed to confirm the reproducibility and repeatability of the method.