Re: Was - Help with MAYFLY 14 Build - Now Plywood Qualtiy.
- John, just to clarify this is what I said: Even a "1088" stamp means
nothing. Not quite the same thing as you refer to.
I recall a post on another group that a fellow bought some Meranti and
it had "1088" stamped on it and he found it to be crap compared to what
I totally agree that dealing with reputable plywood store is the best
way to go and if in doubt just buy one sheet and test it yourself. If it
fails, don't build a boat with it. If it has a beautiful exterior then
check the edges. If the outers are paper thin and inner is darker in
color and thicker then I won't even bother with it. Voids in the glue
lines are just as critical as voids in the plies and my testing has
shown starved glue joints as I think the softer inner core absorbs a lot
of the glue, and when tested the outer plies will either separate or
--- In Michalak@yahoogroups.com, "John Kohnen" wrote:
> Looking for MDO made in the US or Canada is a good dtart, but even Oly
> Panel makes lower grades of MDO. Their Crezon has good quality plies,
> may have one small inner ply void per sheet, their Signal, which I
> seen in the flesh yet, is said to have no voids.
> "BS 1088" and "BS 6566" are British standards, and have nothing to do
> Lloyds, though Lloyds probably requires BS 1088 for their best
> I'd heard that the British Standards aren't enforceable outside the
> Commonwealth, or whatever you guys call it nowadays, but if BS 1088
> nothing in Canada I guess I'm mistaken. At any rate, just because a
> plywood has "BS 1088" on it, it doesn't mean it could pass the British
> Meranti plywood can be very good, as can Lauan. The trouble we have
> cheapo lauan underlayment has to do with the manufacture of the
> not the species used. The best bet for getting good plywood or MDO is
> buy the stuff made by a reputable manufacturer. If the manufacturer's
> isn't on the plywood, or the seller can't show you where he got it,
> stuff probably isn't worth taking a risk on. When buying MDO, get one
> the better grades.
> On Fri, 31 May 2013 18:35:40 -0700, Nels wrote:
> > John,
> > You are dead on in your comments.
> > My local seller is Windsor Plywood and their supplier is from a
> > source
> > ...
> > My
> > salesman told the main factor is to make sure it is stamped "Made in
> > Canada" or "Made in USA" otherwise it may not be up to standards
> > established here, for genuine MDO.
> > ...
> > Even a "1088" stamp means nothing. Does not mean it is Lloyds
> > certified. Just a phony stamp on off-shore imitations.
> > ...
> John (jkohnen@...)
> "Necessity is the mother of invention" is a silly proverb. "Necessity
> the mother of futile dodges" is much nearer the truth. (Alfred North
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