One of the timber merchants local to me recommended in one of my other threads (Where to buy timber?) is the East Kent Timber Company, just outside Canterbury. Their website is at
On the page devoted to Quality Softwood Joinery the timber is classified as two types: UNSTORED and VTHS. A bit of Googling suggests that the latter is actually "Vths" (ie 5ths or fifths) though I've not been able to find out exactly what that means as yet - but UNSTORED has me baffled, unless - and I've only just this moment thought of this - it means that they don't keep it in stock but have to get it in specially. Since the very same page talks about their "extensive stocks" this seems a tad unlikely.
I'd appreciate a translation of both terms. Many thanks.
Bert