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What are the risk of using air dried pine logs to build a log abin3/14
I think you already know the risks, and I agree. Without setting the pitch you can have some issues.
I can see three issues:
You can use professional fumigation for insects. Not much can be done about sap. Make sure you have some spare squared logs to replace really bad warp. Pretty tricky operation.
Yeah that's what I figured !
Gene I understand setting the pitch BUT how did they build cabins 100 yrs ago as there wasn't any kilns to set the pitch in????
Charles, I'd study how they worked logs for cabins in history. From what I've read and reading now is your treatment/seal that you put to logs can cause long term problems IF not chosen and/or used correctly. ALSO from the readings the "kilning" the log home industry refers to is actually more a sterilizing process AS to "kiln" a log down to what we call a "normal" standard for building would be astronomical and not economical/feasible in price.
Heritage makes a oil/finish that is for logs and timberframing and does more penetration and breathing. I'm not sure IF they sale borate products BUT the log home industry uses a borate based insect repellent under several brand names as "Timbor", "penetral"(this may be spelled wrong as there's a few other products with a close spelling) I think by SASHCO, PermaChink has one. There's several log and timber frame companies that offer products.
Warpage???? Unless it's a common thing with SYP I don't understand the concern as there's TOO many old cabins that would've destroyed over the years......I DO understand the possible issues of our tighter buildings and the interior and exterior keeping a wider spread in RH/MC that possible cause a issue BUT I'd want to see the study/documentations IF there is.
The cabin looks neat. It appears to be portable. Is there a website to check out your product???
Many, if not most, log cabins were temporary until they owners built a house sided with lumber. One reason was that log homes leaked, as the logs moved, so it was a continuous job to chink the logs. Insects often invaded the logs after a few years. They early folks learned that the roof overhang was important along with no bushes or shrubs nearby so that the logs would dry quickly after a rain.
Syp was not the best choice for log cabins due to warp and sap. Plus, most syp trees were too large. Also, all logs for a log cabin had to be hand lifted into place, and syp is quite heavy plus hard to work- -cut notches, etc. So, for these reasons, they preferred white pine and other local species. But it is rare to even find photos of slave quarters made of logs in the South. More recently, red pine is preferred.
Sap flows with heat...I suggest that today’s cabins are much warmer inside than the old ones, which means more sap. They are better lighted so we can see sap exudation today. We think sap is a huge defect. Warped walls are also a defect today compared to the past.
Thanks Dr. Gene and Tim for your response thoughts and input
100 years ago the standing stock was much different than today. Old growth timber could produce logs in cabins that were 2' wide. This old growth stock was much more rot and insect resistant, but, I doubt if those people worried about a few little powder post beetle holes. I watched an episode of Barnwood Builders. They were installing recycled logs in new construction that were riddled with powder post beetle holes. I asked them on their Facebook page about their sterilizing methods and if they did that. No answer.