Rockwool for wet wall

[itilien]

Hello,
what do you think about growing pleurothallids in a vertical wall made from rockwool that is constantly kept moist by circulating water? Probably this is fully hidroponic, but it seems that you have experience with the properties of this material. There is an orchid store owner from Belgium that runs such wall and according to his posts in facebook it is working very well. In my oppinion it has 2 advantages over epyweb and 3d mesh like hygrolon - it looks much more natural and it doesn't lock the roots of the plant like hygrolon does. But I'm wandering how fast this wool will compress and become air impervious?