> It would be interesting to know what type of timber the ply that youJust a note: "Oregon" pine is not pine, it's Douglas Fir, which isn't a
> used is, I used Australian produced Hoop Pine but I can't pick from
> your photos what yours are. "Pine" of some kind, no doubt. I know
> that NZ is producing "Oregon" from plantations now so I'm wondering if
> plywood is being produced from that source now across The Pond?
fir, either, alas. It's a Pseudotsuga (false hemlock) menziesii. It's a
great tree, grows like a weed and straight, too, and a great wood, for
dimensional lumber and plywood. Light and strong, and prone to moisture
cycling (because of the difference is the earlywood and latewood). Many
people do not like the look of the roto-cut grain (and I pretty much agree).
Old growth doug-fir is an outstanding boatbuilding wood, works well,
strong, relatively light, good rot and decay resistance. Newer growth,
which is what is mostly available and/or affordable, isn't quite as
good, but it's just fine for what most of us build.
Because of the moisture cycling, DF plywood checks (small openings
appear in the face of the plywod) which is ugly, invites more
cycling/checking, and ultimately rot/decay. This is why DF plywood boats
are often recommended to be covered with epoxy and glass (or other
fabric), which inhibits checking. Paint and/or epoxy alone are not
enough to stop checking.
- Loved this article. Bit of an enlarged version.