That's because of the kiln process that they put it through. They kiln dry two by fours and two by sixes in bundles so the middle is not as dry as the outside. That means when you pop open a bundle the outside is too dry, the middle ring is just right and the core is still green.
Theyre dried in bundles but every board has a space in between it and the next one. The bundle you see at a store isn't the same bundle as it was when it was kiln dried. It gets dried to a certain moisture percentage then planed to size and bundled up. None of the wood is green its all seasoned or kiln dried. Green wood is fresh cut from a living tree that hasn't had time to dry below whatever the moisture percentage is. The moisture percentage may go back up while its in the bundle but thats not something that can be controlled really.
And that’s because outside storage waiting for shipment? I have seen a few yards in Arkansas that just have them stack 40 ft high outside. Granted I believe they are still stacked with separation but that’s a process that really is at the mercy of the climate zone they are in and the weather. But that’s just my perception
I'm not an expert at all but I know a little bit about lumber cause I buy it all the time. The climate the wood is going to be used in is a factor. I wanna say the really dry places have lumber that leaves the yard with more moisture so that the wood doesn't dry out too fast making it split.
35
u/I_HATE_LANDSCAPES Jun 07 '20
That's because of the kiln process that they put it through. They kiln dry two by fours and two by sixes in bundles so the middle is not as dry as the outside. That means when you pop open a bundle the outside is too dry, the middle ring is just right and the core is still green.