Finally! Easy to Understand Explanation (Kiln Dried vs Air Dried Lumber!)
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- Опубликовано: 9 фев 2025
- Kiln dried vs air dried lumber - Why are they different? the We’ve Cracked the Code to Making Millions with a Sawmill, and YOU Can Too! Discover the secrets behind our sawmill success! I absolutely love sawmilling-it's thrilling, enjoyable, and incredibly rewarding! I'm Robert Milton, a former Research Aerospace Engineer known as "The Sawmill Professor," and the proud owner of Hobby Hardwood Alabama, a multimillion-dollar sawmill and lumber business with a stellar A+ BBB rating. Join me as I share real-world, expert sawmill tips and tricks that will elevate your lumber to the same high standards we uphold at Hobby Hardwood Alabama. With decades of experience in sawing and drying lumber, we're committed to delivering the finest quality lumber in the nation. Whether you're into homesteading, timber framing, off-gridding, or woodworking, you can profit from a sawmill! I'll reveal small business ideas and show you how to enhance your woodworking projects. As a moderator of the largest sawmilling and lumber drying forum worldwide (find me as "Yellowhammer"), and with my wife being a retired NASA engineer, we apply an engineering mindset to our lumber processes-there’s always a purpose behind our methods! Our premium lumber is sought after nationwide, and you may have experienced it without realizing it-ever tuned into Nashville radio or the Grand Ol Opry? That’s our wood! Join us, watch our videos, and witness the difference in our approach. We began with a chainsaw mill, advanced to a portable manual sawmill, and finally a production bandsaw mill. We aren't just a video company; we’re a legitimate lumber business eager to share our money-making sawmill strategies. This video showcases our sawing practices, log milling, drying processes, and much more from our outdoor farm. #sawmillprofessor, #woodyoda, #sawmill, #planer, #woodworking, #lumberkiln, #HobbyHardwood, #hobbyhardwood Don't miss out-explore our other pages! Mail Address: 237 Shady Trail, New Market, Al, 35761 Email for Business Inquiries: HobbyHardwoodAlabama@gmail.com OUR WEBSITE: www.hobbyhardw...
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Go check us out on our other pages! Mail Address: 237 Shady Trail, New Market, Al, 35761 Email for Business Inquires: HobbyHardwoodAlabama@gmail.com OUR WEBSITE: www.hobbyhardw...
I'm glad that you covered this. Most people have misconceptions about moisture content. When I build houses I let the flooring acclimate to the interior for preferably 4 weeks. When I cut 2 to 4 inch flitches I air dry them for several years, then pop them into the solar kiln. I don't like the commercially dried black walnut, as the tone changes during steaming. Keeping my lumber in a controlled environment ensures that the final product won't blow apart. I still use traditional methods of furniture construction, such as breadboard ends on tables. I've seen table tops shrink and expand in homes, even though the homes have central heat and air.
You are right, people don't realize how much wood moves, season to season, even in a house.
Another good advise thanks last time I dried wood in the kiln temp was 120 and moisture 6.5
That's very good, but be cautious, once the wood gets under 6%, it actually moves more as the cellular structure really collapses and induces additional stress, and also machinability goes down. For example, there will be increased tear out when running through a planer.
Another great video from The Professor 🎉
You you!
Thanks Mr. Robert
Thanks for your understanding of kiln drying. I’m wondering if solar kiln drying is enough to kill the bugs. I use the Virginia Tech Solar Kiln and I can get wood to below 8% but I’m not sure about the bugs.
Love your new intro "Dave". Great content today with your explanation and visual aids of osmosis. This was much better and easier to understand that what was taught in my nursing A/P1 class.
Both you and Nathan have the same human equivalent of a willow tree - strong yet flexible, bending with the wind rather than breaking under its force. Sometimes, I can see your Aerospace Engineering trait trying to rise up, you should be commended for keeping it suppressed. I know that trait because my father was a mechanical engineer.
You are correct about Nathan, Out of the Woods, being a good Sawyer. I have been watching his channel, sawmill, and homestead grow for years.
Thanks, I try to hide my engineering DNA, but sometimes it comes out!
Another Great Video Professor! We are just north of you in Tn just South of Nathen. After you kiln dry the wood and get to 7% then remove and store the moisture content seams to go back to the equilibrium of 12% here any way. Is the wood actually gaining moisture back into the cells or is the wood considered dry and will no longer shrink. I see in your storage facility a giant door open which would be hard to dehumidify. Does your finished lumber gain in moisture content after your kiln drying?
Yes, the wood will regain the unbound moisture if it can and is exposed to a higher EMC. However, being unbound moisture, it is removed agin very easily and generally won't cause significant wood movement. Ours regains very little moisture, it is dead stacked and we run dehumidifiers. Also, we sell it so fast, it doesn't sit here long. Plus we keep the doors down during the week.
@ Thank you. We do the same I use are so quick it does not sit around but does regain. We have had 0 problems but does not hurt to ask an Expert. Thank you!
Once kiln dried wood is left in the open, do the cells reabsorb the water eventually?
My question also, I would imagine the wood will collect moisture again
Yes, it will adjust to the humidity in its surroundings.
Excellent video sir,
Miner was botany, you explained it better the he did.
Lol
Nathan has several doubles lol😂
Your materials ends look like they came from a pro!!!👌💪💪💪💪🧡
Keep up the Excellent work and take Martha to dinner
So if your building a barn or outdoor building air dried wood would be fine as it's going to always be outdoors anyways??
Yes, you are 100% correct.
I imagine you were thinking about drying rate tied to trapping internal stress, need to learn more about that preparing flooring stock.
Is there a difference when working with the two? Is kiln dried harder on tools? Isn’t kiln dried wood harder? Is kiln dried wood more resistant to emc changes?
Utah is a kiln lol.
Still looking to do a solar!
If I'm in an area that typically is 13% and boards are kiln dried to 8% , will the boards soak up moisture if I don't use them for awhile?
Yes, but they will only reabsorb the unbound moisture, which while it can readily be absorbed, is also equally as easy to lose.
The Professor correctly politely smacks a couple of knuckles with a wood ruler a mite. Wood moisture content is an eternal forever issue. The only solution is artificial wood. Thank you for re-re-recovering it. Living in the, basically, moisture free southwest I continue fantasizing about normal wood usage. When I grew bored with Fine Furniture building and started pre-anglo southwest hand constructed furniture which originally used ambient moisture lumber. Fascinating. With modern kiln dried lumber pre-sealing and finish coating does the kiln dried lumber Reabsorb moisture and swell out of dimension?
Yes, but very slow;y with modern finishes, but once it gets into a house, it pretty much stays the same.
Love this video……except it was hard for me to concentrate once I started correlating the drying of wood and the drying of meat! I’m gonna have to rewatch after eating a pound of jerky.
If you eat a pound of dried jerky in one sitting, that will give a whole new meaning to the term "bound" water!!
@ Very true, however, considering my colons EMC…..I like that delta!
@@HobbyHardwoodAlabama😂
In other words kiln drying draws out the trapped moister inside the wood Robert but what happens if you go past 7%
At under 6%, bad things start happening. Machinability goes down and the wood will, for lack of a better, start to "crinkle" and flat wood will start to move as extra drying stress are induced.
Unfortunately, you didn’t talk about what kiln drying means for reabsorption of moisture.
Yeah, that will be the next one, there is lots to it, as well as how it effects steam bending, and it was getting long and I had to get back to work...I deleted the clip where I was talking to the camera, the phone rang, I sent it to voice mail (not good for a business), started talking again, the phone rang again, I answered that one, and then Martha yelled over "Are you going to keep playing with that damn camera or going to cut wood?" It was hilarious, but it was obvious I was done filming for the day. Sometimes the real world interferes with my dreams of being a Steven Spielberg.
When the phone rang, I scrambled from my phone, thinking it was mine.
stop telling my secrets,
I knew it!!! 🤦🏻♂️😂👍🏻
So a question below is this and it was also mine Once kiln dried wood is left in the open, do the cells reabsorb the water eventually? an answer came back to this as this Yes, it will adjust to the humidity in its surroundings. so if this is so then why do we kiln dry the stuff if its dries to 12 percent in the open and we kiln dry it to 7 percent then put it back in the open it goes back to 12 percent then why did we waste all the time and dollars to kiln dry it in the first place ?????????????
Robert would know better than I would. But there are a few good reasons. Some parts of the country insects are a problem and kiln drying kills them. Second, I have heard that bringing the wood up to a higher temperature changes the cell structure to inhibit the wood from reabsorbing moisture as quickly. Third, I think is a business reason. Air drying takes a long time. The amount of covered space you would need to store your wood while it dries would be significant for most mills operating as a small or side business. You need to cut your logs, dry the wood and get it on the shelf in shortest time as possible. Your not making any money while it is siting in the yard. Those are just my thoughts.
@@billtufts580 thanks
Robert's explanation was excellent on bound and unbound water. If you are selling quality wood to woodworkers you have to bring the moisture down to a level where they can use it and they know what they are getting, (they can see what it looks like finished dried). If you are cutting fence boards it probably doesn't matter if you are not worried about insects.
That’s against Robert, I have my slab poured but my kiln project has been put on hold for now.
Your welcome. That's good, the slab being poured.
Hey Robert. If you kiln dry lumber then put it back out in the yard will it reabsorb the moisture back to 13%
One other little observation. Like me you can't be a real sawyer because you don't have a beard. Every sawyer on the internet has to have one.
Yes, it will slowly go back up to whatever the local EMC is, but the bound moisture cannot be reabsorbed so the wood won't move as much when it regains moisture. I keep thinking I need a beard, but summer rod coming and it will get hot. Since I don't have a stunt double, I will suffer.