Hi everyone; I had not read the last few posts before my previous reply so here is some more information.

To clarify, Jack Sobon did not create the idea of a groove to hold boards without using nails. It is an early traditional practice, at least here in New England. There are plank grooves too.

Fire door clinch nails are still available for purchse and work well. Clinching the ends of the nails makes them act like screws, they hold two boards together much better than a simple nail.

I had forgotten about using pins to hold roof tiles in place, there are examples of this at Old Salem, North Carolina.


Interesting thread.

Jim


The closer you look the more you see.
"Heavy timber framing is not a lost art" Fred Hodgson, 1909