Phase change materials (PCMs) are latent thermal energy storage materials that can be used in building construction elements for regulating temperature fluctuations during day and night. Storage of thermal energy using PCMs integrated within building materials is efficient and rational way of handling available energy resources. Since the energy consumption and its cost are increasing everyday [3], development and understanding of PCM impregnated building materials are of growing interest. In this study impregnation of wood with PCM was of an interest. This study focuses on a characterization of a novel hybrid building material comprising of wood, paraffinic PCM and polymer coating.