Fig. 6b) and the expanded clay (detail c, Fig. 6b) concrete samples
were then placed in the hole of the XPS panel and both materials
were connected by polyurethane foam. The set (i.e. sample and
XPS) replaced a window and was also fixed by polyurethane foam,
(detail d, Fig. 6b). All these experimental procedures require additional
care in order to avoid any undesirable insulation voids, thermal
bridges, non-insulated headers and other faults which may
compromise the feasibility of the final results.