Wetness is the enemy of the builder. This is especially true for permanent moisture, so-called waterlogging - here wood rots first. With SPAX Air 4,5 there is a simple way to separate the planks from the substructure, which ensures better ventilation of the wood and rapid dehumidification. At the same time, the 4 mm thick SPAX Air 4,5 ensures proper and even spacing between the planks, making installation much easier. In this version of SPAX Air 4.5, the distance between the planks is 4.5 mm. This means for you: Perfect constructive wood protection for a longer life of your terrace.