I am very new to stone walling and I'm curious about something. I've been watching stone-walling videos on Youtube and I noticed that there are some stone wallers who build vertical walls. These walls seem to be built by Irishmen. (see John Dunne Stone Mason, and some others). Then there are stone wallers who taper their walls toward the top (Americans and some others).
Then again, perhaps I'm wrong. Perhaps the vertical walls are all tapered but so slightly my untrained eye cannot see.
Any veteran stone wallers who can enlighten me?
Thank you.