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Author Topic: Sterilizing 8x8 white oak beams  (Read 840 times)

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Offline Raym

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Sterilizing 8x8 white oak beams
« on: June 24, 2018, 08:05:03 PM »
i have a small job to supply some 8x8 white oak beams. They will only be able to air dry about 8 weeks. Should I just spray them with timbor as sawn, or should I stick them in the kiln with the temp up to 150 for several days?

Not concerned about checking or degrade as these are not structural and they want rustic.

What are your thoughts....
'14-LT40 super, nyle l200m kiln, vintage case 480E loader.

It's not the fool that askith, it's the fool that agreeith.

Offline Larry

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Re: Sterilizing 8x8 white oak beams
« Reply #1 on: June 24, 2018, 09:54:40 PM »
Bugs show little interest in white oak heartwood.  I wouldn't do anything.
Larry, making useful and beautiful things out of the most environmental friendly material on the planet.

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Offline scsmith42

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Re: Sterilizing 8x8 white oak beams
« Reply #2 on: June 24, 2018, 10:01:14 PM »
If you put them in the kiln for several days at 150F, they will honeycomb inside.  Been there, done that.

On the other hand, Timbor does not penetrate very deeply into WO due to the tyloses in the pores.  Fortunately it does not need to go very deep.

I think that I'd lean towards the Timbor.
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Offline Raym

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Re: Sterilizing 8x8 white oak beams
« Reply #3 on: June 25, 2018, 08:09:00 AM »
I figured honey comb would be a side effect but not sure that really matters based on the end use. Some of these will be used on the interior so that's why I was a little concerned. His logs have been felled for about 18 months.
'14-LT40 super, nyle l200m kiln, vintage case 480E loader.

It's not the fool that askith, it's the fool that agreeith.

Offline GeneWengert-WoodDoc

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Re: Sterilizing 8x8 white oak beams
« Reply #4 on: June 26, 2018, 06:28:17 AM »
With that long since they were sawn, I do believe it would be prudent to use some sort of treatment.  As mentioned, Tim-bor will not penetrate any easier than bourbon or wine penetrates in a white oak barrel (unless chestnut oak).  So, heat is your only choice.  If you go to 150F AND use a humidity high enough so that the piece s will not dry (for example, 12% EMC if they are at 12% MC), you will not get checking or honeycomb worsening.
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Offline Don P

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Re: Sterilizing 8x8 white oak beams
« Reply #5 on: June 29, 2018, 06:54:25 AM »
The whiskey that would evaporate through the white oak in a sealed cask was called the "angels share". Don't forget that white oak does dry which means moisture does move through it, albeit slowly. If moisture can move, diffusion works. The kiln will sterilize but will not offer any protection once out of the kiln. At high heat and humidity and with wood that is above fiber saturation, when you can cut off a fresh end and can see moisture, those kiln conditions would actually help drive the borate in. Pressure treaters report that they achieve complete penetration of borate above FSP under heat, thereby protecting the timbers where they cannot get the treatment chemicals to penetrate. Although the pressure certainly helps the drivers in that tough to treat heartwood are really diffusion and heat.


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