: Treating Exposed Plywood
Benny 10-19-2003, 11:03 PM I am using plywood for the decks on utility trailers and need to treat them.
My old boss would use oil and gasoline (about 50/50). He said the gas would draw in the oil then evaperate leaving the oil behind as a treatment.
The guy is a total asshat, so I need a second opinion.
Is this logical? If not, what is the best way to treat the plywood?
Its CDX grade.
Old Scout 10-19-2003, 11:10 PM Your oil/gas treatment will be slippery as fawk after a rain. I would use a Polyester resin. It's the same stuff fiberglass is made out of ,but without the matting. If you add a little MEK to the resin it will become water thin and penetrate the wood before it sets up.
It's about 10.00/gallon for the resin and hardener.
tbriley 10-19-2003, 11:36 PM I would use a Polyester resin. It's the same stuff fiberglass is made out of ,but without the matting. If you add a little MEK to the resin it will become water thin and penetrate the wood before it sets up.
I agree. I've used 100's of gallons of the stuff on multi-use concrete forms/molds. It never really gets hard, kinda leaves a plyable, sticky finish. Don't mix all of it up 'cause it goes farther than you think. Keep the unused part sealed up for later reapplication.
Oh' yeah. Dont use too much MEK cause you can cause a fire with it.:eek:
nakona 10-20-2003, 06:03 AM Beofre installing them, hose them down generously with Thompson's Water Seal.
After you install them, hose down the exposed surface again, then do it twice a year thereafter.
Why aren't you using pressure treated wood to begin with?
I mean, the water seal will protect even untreated wood, but you're better off starting with pressure treated, and it IS available in plywood versions.
Oh, also...
I personally would use OSB if I was using untreated wood. It doens't have layers to separate like plywood does.
trampas 10-20-2003, 06:39 AM Originally posted by nakona
Why aren't you using pressure treated wood to begin with?
I mean, the water seal will protect even untreated wood, but you're better off starting with pressure treated, and it IS available in plywood versions.
Don't know bout your area, but PT ply is some damned 'spensive stuff here :eek:
Bobzooki 10-20-2003, 06:44 AM Originally posted by nakona
Beofre installing them, hose them down generously with Thompson's Water Seal.
Thompsons is CRAP.
I live at 9,000 feet elevation, and the weather we have really shows which treatments WORK, and which treatments are a waste of money.
We coat our 1,200 sf deck, and our entire cedar sided house with SuperDeck. It runs about $120 for five gallons. It WORKS! That's what my flat-bed trailer is treated with, too. Easy to apply, works with one coat (more is always better, though).
nakona 10-20-2003, 07:02 AM Las -
What is the total difference in price for this particular project?
Bob -
I wouldn't say Thompsons is crap, but if you found something better, great I'll try that next time I need to do some sealing work.
Bobzooki 10-20-2003, 07:06 AM Originally posted by nakona
Bob -
I wouldn't say Thompsons is crap, but if you found something better, great I'll try that next time I need to do some sealing work.
I would, I will, and I do. We put that shit on the deck once, and between the sun and the rain, it was gone in about 3 months. While Penofin is a great product, it's nasty as hell, and takes two coats. Superdeck is much less nasty (Penofin KILLS shit!), and goes on in one coat. It wears like iron!
trampas 10-20-2003, 07:10 AM Originally posted by nakona
Las -
What is the total difference in price for this particular project?
I guess that would depend on the amount of utility trailers.
$50-80 a sheet for PT, and $16 for CDX.
nakona 10-20-2003, 08:49 AM Holy SHIT! You DO pay a lot for PT.
Where do you live?
nakona 10-20-2003, 08:50 AM BTW, there's always Spar Varnish.
I donno bout you, but at those prices I'd use MDO ;)
Originally posted by nakona
BTW, there's always Spar Varnish.
always paint too :D
which would probably be my choice, cheap and it works.
Deep South Cruisers 10-20-2003, 08:58 AM Thompsons does suck arse, I used a Benajamin Moore sealer and it worked much better.
FLOOD is a ass kicking sealer but very expensive.
sceep 10-20-2003, 09:10 AM why not just herculine it? :confused:
trampas 10-20-2003, 05:09 PM Originally posted by nakona
Holy SHIT! You DO pay a lot for PT.
Where do you live?
Those are SF lumberyard prices.. and they're the only ones i could find when doing a Victorian retrofit in the city... which via UBC ammendments in San Francisco require 5/8 PT black, or 3/4 PT green... and the 5/8 ran $61 per 4x8 unit. :eek:
Spray some napthanate on some cdx... keeps any fungus from growing, and in Oregon you might really need just that kind of treatment.
Jasco's "Termin-8" is copper napthanate, $17/gallon.
Old Scout 10-20-2003, 05:17 PM Originally posted by sceep
why not just herculine it? :confused:
$60-80 a gallon thats why!
You guys haven't priced plywood lately have you?
In April we got 5/8" plywood for 7-8 a sheet, Now its about 3 times that.
why you ask? well it seems we are shipping it all to Iraq, and Afganistan. I'm glad we bought it when we did (it was a bit underpriced then). If we had bought it now it would have added Thousands to the price of the house.
trampas 10-20-2003, 05:31 PM Originally posted by DEnd
You guys haven't priced plywood lately have you?
In April we got 5/8" plywood for 7-8 a sheet, Now its about 3 times that.
why you ask? well it seems we are shipping it all to Iraq, and Afganistan. I'm glad we bought it when we did (it was a bit underpriced then). If we had bought it now it would have added Thousands to the price of the house.
Well you're in some sort of a pricewarp zone then...
cuz i've NEVER bought plywood for $7 a sheet. Not even 1/4" :flipoff2:
3/4 cdx runs as much as $21 here now, but can be had for $17.
ChiScouter 10-20-2003, 06:25 PM Prices have jumped here also, but 3/4 pt is 31 per sheet
Originally posted by LasRamblas
Well you're in some sort of a pricewarp zone then...
cuz i've NEVER bought plywood for $7 a sheet. Not even 1/4" :flipoff2:
3/4 cdx runs as much as $21 here now, but can be had for $17.
Don't you live in Kalifornia? or somewhere close? but like I said it was underpriced at the time. Now If I would have bought it in Charlotte instead of 60 miles away It would have been a bit more expensive.
kn_ranger1 10-20-2003, 07:08 PM [QUOTE]Originally posted by nakona
Why aren't you using pressure treated wood to begin with?
I mean, the water seal will protect even untreated wood, but you're better off starting with pressure treated, and it IS available in plywood versions.
This is what I have heard about pressure treated plywood....It was developed for use in wood foundation homes. It works best in a cool, damp environment (like foundations) or it will deteriorate faster than regular cdx treated with a sealer if it drys out or is exposed to UV rays. I was told by a local lumber yard owner NOT to use treated plywood except in a situation where it will kept out of sunlight and won't dry out.
trampas 10-20-2003, 10:46 PM Originally posted by kn_ranger1
[QUOTE]Originally posted by nakona
Why aren't you using pressure treated wood to begin with?
I mean, the water seal will protect even untreated wood, but you're better off starting with pressure treated, and it IS available in plywood versions.
This is what I have heard about pressure treated plywood....It was developed for use in wood foundation homes. It works best in a cool, damp environment (like foundations) or it will deteriorate faster than regular cdx treated with a sealer if it drys out or is exposed to UV rays. I was told by a local lumber yard owner NOT to use treated plywood except in a situation where it will kept out of sunlight and won't dry out.
True. Rated sheathing in damp climates and earthquake zones.
Grim Reaper 10-21-2003, 11:08 AM Originally posted by nakona
Holy SHIT! You DO pay a lot for PT.
Where do you live?
Go price it in your area.
The War in Iraq has driven the price up because of the demand the military has put on the market. I just had to buy 6 sheets of 3/4 void free underlayment grade for the 1959 Airstream I am restoring. $38 a sheet a month ago when I bought it. 2 months ago it was about $28. I think it's up to $45 a sheet now.
At that price baltic birch or appleply might be cheaper :eek:
Prices on neither of those have gone up locally. Bout the only sheet goods I use these days, other than MDF and MDO
TLCObsession 10-21-2003, 12:18 PM While the military did buy a lot of ply for Iraq (and Kw8), it amounts to .22% of the annual output. Like many things it is largely speculation and gouging.
Several of the mills were shut down, and have restarted, and a bigger effect on pricing are the forest fires, particularly in BC - which shut down several mills and logging operations.
Ply & OSB prices are really bad right now.
Ironically, look for prices to tank in the spring - all that burned timbber will be salvage logged, and prices will drop.
BTW - On the PT side of things, prices are going up because the same folks who shut our trails down are making all residential PT switch from CCA to ACQ - a more expensive, less effective treatment. Oh and BTW - it eats galvanized - like joist hangers, nails and the like....
Jim
Originally posted by TLCObsession
ACQ - a more expensive, less effective treatment. Oh and BTW - it eats galvanized - like joist hangers, nails and the like....
Jim
Makes naturally resistent species look more and more appealing don't it.
Simon 10-21-2003, 12:27 PM The stuff that The Flood Company makes is excellent but spendy. I've used their stuff on my house - cedar shingles - as well as on a deack and picnic table and it has held up well. Sunfrog makes some good stuff too, but it is also spendy.
I volunteer maintaining an historic fire lookout up in the cascades. We use 50/50 boiled linseed oil and thinner for the desck and shingles and it seems to work pretty well. It is a lot cheaper than the other stuff and you can spray it on with a garden sprayer.
Drawbacks: it stinks like hell, and will turn blackish or be sticky if you lay it down too thick without letting it soak in.
Whatever you use probably won't penetrate beyond the first ply too well anyway....
Simon
TLCObsession 10-21-2003, 12:28 PM Originally posted by mike
Makes naturally resistent species look more and more appealing don't it.
I am headed towards Ipe for my decks and docks....
Originally posted by TLCObsession
I am headed towards Ipe for my decks and docks....
I've seen Ipe decks... looks NICE :D
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