Subfloor: solid board at 45-deg angle.

[bob_cntrctr]

Gentlemen,

Interesting read about OSB vs plywood here:

http://www.umass.edu/bmatwt/publicat...s_plywood.html

This part in particular caught my attention:

...In his study, Loferski simulated what happens on a real construction site. He built several full-sized floors out of boards, plywood and osb.....The study showed that solid boards installed at a diagonal were far and away the best system...

I've seen this once before, in an old old house. I remember thinking "someone was either drunk or had too much time on his hands". Turns out I was looking at "far and away the best system" of sub-floor there is.

Does anyone actually do this anymore? Does anyone even know anymore that this is the best sub-floor you can build?

[neolitic]

Since plywood answers the bracing
served by the 45, run the numbers
on labor and materials, add time to
complete one vs. the other....
not much mystery here.

BTW 1X sub floors aren't any secret
to anyone who has been around
this business more than a minute.
Nice that you learned something
though.

[A W Smith]

Very common on anything built mid century and before. Did you know it was also common practice to install board wall sheathing angled up to face the direction of prevailing winds?