I'm curious. You say "the first 1/4" or so is _brown_". Are you
talking about "brown treated lumber"? If so that 1/4" of brown is a
colorant, not the preservative. It's applied in a separate operation,
not under pressure.
Most of the treated lumber I've seen and recognized is brown, but I do
have a piece that's yellow with a greenish hue to it. I have not cut the
yellow piece, so I don't know if it changes colors (tints) partway
It's entirely possible that there's 4-5 different treatment methods "in
the wild" now and some are the partial treatment using a brown chemical
while others actually penetrate the entire piece.
After all, why do more than necessary? If someone's buying a 4x4 post to
sit on the ground for landscaping and the thinner treatment stops most
everything from getting in, why worry about the core?
Never teach your apprentice everything you know.
I'm curious as to the treatment--almost all pressure treating of
construction lumber involves copper compounds and almost all copper
compounds are green. Brown pressure treat would usually be creosote,
which would go in railroad ties, marine pilings, and a few other uses.
The stuff is sticky and has a distinctive odor and is generally not used
for light construction.
If it's "partial treatment" it's crap. The dark brown treatment is a
coloring for deck lumber and other uses where the lumber will not be
painted and is in addition to the preservative--it's no more a
preservative itself than an application of Minwax is a preservative, it
just goes deeper so won't go away the first time you clean the deck with
a pressure washer. The only brown preservative in common use is ACQ-D
IIRC, and it's a light brown, not dark.
Does your lumberyard stock two kinds of pressure treated lumber, one to
"sit on the ground" and the other to be cut up to make decks and the
like with through-holes for fasteners?
In any case, lumber rated for ground contact generally has a heavier
treatment than lumber not intended for ground contact.
Nope. Either that or you can get better PT than I can. There are also
different strengths of PT; eg, ground contact, direct burial, etc.
I have always heard - and agree - that if you cut a piece of PT the
resultant raw wood should receive an application of a fungicide. I always
do so with Cuprinol.
Any PT I've cut up is the same color all the way through. Yes, there
are different grades but that is due to different formulation and
concentration of the treating bath and to different treating techniques,
not to different degrees of penetration.
If it's dimension lumber and it's not the same color all the way through
(leaving aside heartwood vs sapwood) then it's crappy treatment and you
should return it and demand a replacement that has been properly
treated. Heavy pilings sometimes don't get quite that degree of
uniformity but even there most of the sapwood should be penetrated.
On Tue, 27 Apr 2010 10:42:01 -0400, the infamous "J. Clarke"
Every single piece of PT I've cut into both in California and Oregon
over the past 30 years, from at least ten different sources, has had
"crappy treatment", according to your theory, JC. Except for the end
inch, every cutoff I've made has had untreated wood inside, period.
And that goes for Womanized, CCA, AZQ, and others.
Pics, please! Location and sourcing, too, eh?
Losing faith in humanity, one person at a time.
J. Clark is right. Here are 3 pictures of wolmanized 2x4 and a 2x6 I
had laying around my shop. These are above ground pieces, not rated for
below ground use and whether the pictures show it well or not, I can
tell you the treatment is all the way through. The 3rd one shows the
heart wood is a different color but the treatment is throughout, and not
just he first 1/4".
This is standard wolmanized lumber, can't say where I bought it but
probably 84 lumber, a lumber yard.
I'm pretty sure PT wood must be green when treated. If it is dry, the
treatment won't penetrate as it is some sort of hygroscopic hocus pocus
that is going on?
News Flash: Government Motors fines their top competitor $16 Mil.
After thinking about it, the last PT lumber I bought was at Home Depot
when my son built a couple of picnic tables out of it. The pictures
just show that the treatment goes all the way through as J.Clark
professed, and the sticker still on the end says for above ground use.
You can bet I cherry picked like crazy. I never bought lumber w/o
cherry picking, even at the best lumber yards.
A.C.O.R.N: For Democrats that just can't vote often enough...
On Tue, 27 Apr 2010 06:06:01 -0700, the infamous Winston
Or not. I'd love to see a cutoff from the middle of a PT 4x4 from Mr.
Clarke. I've never seen PT injected more than about 1/2", and that was
with a vacuum/pressure treating chamber and steel knife incised on 2
Losing faith in humanity, one person at a time.
Just now I cut off one of my HD pressure treated 2 x 4s,
about 6" from one end and made a color scan of the
cross section. I can send a jpg if you would like, anyone
(well almost anyone). Beware, it is 2.8 MB.
Be sitting down before you look at the picture because you
will laugh your ass off.
Harley was venal, arrogant, despicable and a psychologist.
He was the second most redundant man I ever talked to.
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