Wood is one of them. His sensitivity to moisture, which is extremely known or MUC Gai Uri. Modern treatment solutions, applied before use of a building, pretty much improve this situation but does not resolve completely.
As such, it requires a periodical reconditioning itself. Before going to work, though, it is compulsory for a specialist to inspect thoroughly wood components to determine which just reconditioned for whom it would be appropriate to replace the total.
Reconditioning involves removing any traces of old treatment ( for instance, decorative lake shelling ), bathing the wood with a primer, sealing cracks with putty good quality and after all these substances dried initial application of the final layer.