Water is the builder's enemy in particular, permanent moisture, which is called waterlogging. This is where wood rots first due to moisture not escaping. With SPAX Air 4.5 there is an easy 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 the correct and even distance between the floorboards and thus makes laying considerably easier. In this version of SPAX Air 4.5, the board spacing is 4.5 mm. For builders and landscapers, this is a highly effective wood protection system that ensures a longer life of your deck or walkway with little to no warranty claims due to wood rot.