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Author Topic: Drying different species..?  (Read 516 times)

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Offline Bnewman712

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Drying different species..?
« on: June 05, 2018, 09:20:50 PM »
Can you dry different species of wood in a kiln at the same time dh kiln? If so which ones mix and which ones dont

Offline YellowHammer

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Re: Drying different species..?
« Reply #1 on: June 05, 2018, 11:31:15 PM »
Its usually not a good idea to mix loads.  However, it can be done successfully in specific situations.  

Genrally, the drier the mixed load wood before its put in a kiln, the better.  Species with the same general safe moisture removal rate, same color, same thickness, can be successfully put in a mixed load with lots of precautions and supervision.  

I don't recommend it unless a few "learning experiences" are tolerable.  :D

Offline GeneWengert-WoodDoc

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Re: Drying different species..?
« Reply #2 on: June 06, 2018, 06:59:06 AM »
The general rule is that you can mix species and thicknesses but never mix different MCs.  Even then, when mixing species, it is a compromise unless all the wood is air-dried first.  If you look at kiln schedules for air dried wood, almost all species have the same conditions under 25% MC.

There is a listing of easy-to-mix species at higher MCs in Drying Hardwood Lumber, tables 7.14 to 7.21.
Gene - Author of articles in Sawmill & Woodlot and books: Drying Hardwood Lumber; VA Tech Solar Kiln; Sawing Edging & Trimming Hardwood Lumber. And more

Offline WDH

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Re: Drying different species..?
« Reply #3 on: June 06, 2018, 07:42:28 AM »
I do it all the time.  However, I only start with air dried wood below 20% moisture content. 
Woodmizer LT40HDD35, John Deere 2155, Kubota M5640SU, Nyle L53 Dehumidification Kiln, and a passion for all things with leafs, twigs, and bark.

Offline K-Guy

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Re: Drying different species..?
« Reply #4 on: June 06, 2018, 08:23:10 AM »
In your manual the different species are broken down into wood groups. You can dry species in the same group together but they must be the same thickness. Also they need to be at the same moisture content, if one is drier than the rest keep it out till the others reach the same moisture content. Another important point is that you dry at the speed of the slowest drying wood species. Feel free to call me if you have any questions.

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