Hi all. New build house with the usual concrete slab floor (very attractive). Iv been looking at all the different ways of fitting a solid oak natural oiled wooden floor 30sq m and this Elastilon method seems very efficient no need for a sound deadening layer or nails or glue apart from end joints (or thats what I,m lead to believe). I could do with some advice on a good vapor trap to coat the concrete slab with. Has any one had any horror stories about it?