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Home-Drying Lumber?

I have a potentially endless supply of free red & white oak boards & small timbers where I work. I would like to  machine these into hardwood flooring but I don't know the moisture content of this lumber. 

Is it feasible for me to do this or am I just trying to get something for a whole lot of work but very little money? If I can air-dry these boards; how long and under what circumstances can I do this.

Thank you for considering this question from a VERY inexperienced, yet-to-build-a-project, woodworker.

Sincerely,
Richard S.


I doubt that it's feasible to make your own flooring unless you already have a shaper and a planer. Flooring demands a lot of precision. But the wood can be used for lots of finish carpentry projects and woodworking. 

Yes you can air-dry oak lumber, or any wood.

I've never done it, but I have read about it and I've spoken to people that have done it. My understanding is the wood only needs to be:

  • Off the ground by a few inches. 
  • Exposed to breezes if possible 
  • Kept out of the rain 
  • Stacked with "stickers" (spacer boards) every couple of rows. The more air gaps you provide, the faster the wood will dry.

This implies that drying outdoors is possible. Apparently drying outdoors is most common since the lumber can take up a lot of space. But count on taking a year or maybe two years to reach desired moisture levels.

I would store the lumber indoors in the winter and move it outdoors in the summer. From my own experience with composting yard waste, which needs to stay moist, I would say that wood stored outdoors won't dry much during colder winter months.

Small quantities of wood could be stored indoors, with lots of air space, and should be rather dry within a few weeks or months. A circulating fan would help. This is like storing firewood indoors (which is common) only cleaner. When installing hardwood floors the general rule is to let the wood sit in the house for about a week to acclimate to the house's moisture level. Damp wood would take longer. You can tell a lot about the moisture content by sawing the wood by hand. Wet wood is very tough to saw with a regular hand saw.

Here's a really bizarre idea that I thought up a few years ago:

I've wondered about modifying a furnace plenum (the main duct) to be able to slide some boards in place. The constant hot dry air bath would probably dry out the lumber in a few days, but the capacity would only be a dozen or so boards. It would also humidify the air in the house. As long as the wood is clean there shouldn't be any negative side effects, but I have to wonder about tiny mold spores that might reside on the wood, or some organic chemicals that might be given off as the wood dries. We're talking about a natural product that shouldn't cause any harm, but then a lot of people have allergies to various things.

I'm not suggesting you try that because I can't say there would be no consequences. But if I had some wood to dry, I'd be opening up the end panel of the furnace plenum, maybe installing a metal access door made from sheet metal, just to try the idea. Just a thought.

 

Bruce W. Maki, Editor.

Update:

Since replying to this letter I have cut some lumber from logs and planed it. The wood was quite wet, and my method of drying was to simply stand the boards in front of the heat registers in the house. It worked well, but most of these white oak boards were 3/4" thick or less.

 

 


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