Hi..I have a prefab manufactured house near the beach..on cement foundation..like cement pillars..not total foundation. I have awful styrofoam skirting. I would love to have something like cement blocks or poured cement...but is there a way that the house wouldn't essentially just float on them? If that is the case I probably would just do them out of metal or concrete board..but if there is a way to add something structurally to the foundation by way of cement blocks..and the whole town would be out of cement if it were up to me...seeing as we live in tsunamiville...I would do it. The skirting now mostly tries to keep animals out and doesn't do anything else really..not even that very well I am afraid...I also need a way for entrance into the underneath of the house..we have these little doorlets now that don't really attach right...mg