Large amounts of wood waste are generated each year in the world. In an attempt to identify
a good recovery option for those residues, wood waste from construction and demolition works were
used as raw materials in gypsum plasters. However, wood is a biodegradable material which implies
that the products or materials that contain it are susceptible to su ering an important deterioration,
due to exposure in certain environments. For that reason, the aim of this work was to simulate the
e ects that, in the long term, the atmospheric exposure of wood waste–gypsum composites would
have. To do that, the plasters were subjected to 5, 10, and 15 wetting–drying cycles in a climatic
chamber. In this study, the density, flexural and compressive strength, and ultrasonic velocity of these
composites were determined by the influence of the aging process on their mechanical properties.
Furthermore, in order to detect changes on their internal structure, scanning electron microscopy
tests (SEM) were used. The results showed that they were suitable to be used as indoor coverings
of buildings. However, a treatment to reduce the moisture absorption of the wood waste must be
studied if mixtures with high percentages of wood shavings (WS20) are used in wet rooms
