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walnut lumber

2K views 7 replies 5 participants last post by  chrisncarrie 
#1 · (Edited by Moderator)
i recently purchase 200bdft of kiln dried walnut lumber and i've ran across alot of pictures of guys stacking each board apart. Do i need to stack each board individually since its allready been dried or is it fine to lay them on top of each other on a level surface? Is the reason they do that is to keep each board from warping or twisting?
 
#2 · (Edited by Moderator)
When I have kiln dried rough sawn lumber (or any kiln dried lumber) I stack it without sticking it. When I get rough sawn green lumber I stick it. The reason you stick lumber is to get airflow all around it so that it drys, if it is dry there's no need to stick it. I also have a moisture meter so that I can check it to be sure.
 
#5 · (Edited by Moderator)
Humidity as reported is relative humidity and is dependent on the temperature. 50% relative humidity at 50 degrees F and 50% relative humidity at 80 degrees F does not mean there's the same amount of moisture in the air. 50% relative humidity at 80 degrees F will have more moisture in the air then there is when it's 50% relative humidity at 50 degrees F. That's because the warmer the air the more moisture it can contain and relative humidity is the measure of the amount of moisture as a percentage of the maximum at that particular temperature.

So, if the temperature goes up and no moisture is added to the air the relative humidity will go down and vice versa. That would cause a swing in relative humidity when in essence the moisture content of the air didn't change.

So if you're worried about humidity you have to take temperature into consideration.

But you got me thinking. I've never had problems stacking kiln dried wood on my rack which is in the basement. Typically the temperature down there may get down to the 50's F during the winter months (typically in the 60's) and in the mid 70's F during the summer. When I work down there in the winter I have a high efficiency wood burning stove (hides all my mistakes ;) ) that I fire up. That gets the basement in the 70's F sometimes 80 if I really stoke it.

I have an old mechanical humidity gauge down there but now I'm going to get a good digital readout and track the humidity winter to summer just to see. If I had the wireless version of the weather station I have I could just add another sensor in the basement then I'd be recording it along with all the weather data I'm already recording. Darn darn darn.
 
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