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Author Topic: drying pine  (Read 941 times)

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Offline xlogger

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drying pine
« on: July 09, 2017, 06:56:44 am »
I put some 1" pine boards in DH kiln yesterday that has been air drying for 6 months now. I check them around 13%. After getting them dry to below 10% do you run the temp up to kill insects on pine also?
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Offline Ianab

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Re: drying pine
« Reply #1 on: July 09, 2017, 07:07:31 am »
Because it's pine, and it's well air dried, I would say just crank up the temp and get the last 5% moisture out of it, and cook any bugs at the same time.

If wood is well air dried it's hard to mess up in a kiln, so crank things up and finish the wood off.  Couple of days.
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Offline WDH

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Re: drying pine
« Reply #2 on: July 09, 2017, 07:34:04 am »
I sterilize it just like hardwood which also serves to set the pith. 
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Offline xlogger

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Re: drying pine
« Reply #3 on: July 09, 2017, 08:22:30 am »
ok thanks
Timberking 2000, Turbo slabber Mill, 584 Case, Bobcat 773, solar kiln, Nyle L-53 DH kiln

Offline xlogger

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Re: drying pine
« Reply #4 on: July 09, 2017, 12:12:45 pm »
just check the pine and it shows in the 9% was thinking about doing what you suggested and turn up the heat but its dripping steady about two drips a second. Maybe my top boards are dryer than others. Would you go ahead with the heat or wait till dripping slows down?
My last load I waited till dripping slow and it showed about 6-7%. I read here once that 10% is good enough for pine.
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Offline WDH

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Re: drying pine
« Reply #5 on: July 09, 2017, 07:59:31 pm »
Less than 10% has been fine for me.  When you ramp up the temp and open the doors to refill the wet bulb bottle during the sterilization cycle, you will discharge some water vapor, so if you are at 9% now and heat up to 150 degrees and hold it for 24 hours, you will lose a bit more water and come out perfect. 
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Offline YellowHammer

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Re: drying pine
« Reply #6 on: July 09, 2017, 11:08:46 pm »
I also anticipate losing 1% or sometimes a bit more on the sterilization and cool down stage as WDH says. 

I just plan for it, like Kentucky Windage. 
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Offline flatrock58

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Re: drying pine
« Reply #7 on: August 18, 2017, 09:49:48 pm »
When you are sterilizing pine, what are you trying to kill?  I didn't think PPB went for pine and ambrosia beetles leave when the moisture content is low.
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Offline GeneWengert-WoodDoc

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Re: drying pine
« Reply #8 on: August 18, 2017, 11:01:37 pm »
The only dry wood insect for softwoods in North America is the Old House Borer, which only infects new wood.  Damage is slight most of the time.  There is also the termite, but that comes after construction.

For most softwoods, 9 to 12% MC is the common moisture level.  Drier means lots of machining defects.  Due to low shrinkage, a little drying in use is ok.
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Offline WDH

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Re: drying pine
« Reply #9 on: August 19, 2017, 07:24:08 am »
Flatrock, for me, it is more of a pitch set than a sterilization in SYP.
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Offline flatrock58

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Re: drying pine
« Reply #10 on: August 19, 2017, 10:15:25 pm »
Danny,  Thanks, I was wondering.  I thought I might have missed something.  The pine I cut a couple weeks ago for tables will need to have the pitch set for sure in a few boards.  I will have to try that.
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Offline YellowHammer

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Re: drying pine
« Reply #11 on: August 20, 2017, 12:38:45 am »
Flatrock, for me, it is more of a pitch set than a sterilization in SYP.
Me too, except for those big pine borers, the mice, carpenter bees, and wasps building their nests between the stickers when it's air drying.  Also the occasional snake. :o
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