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Author Topic: Got a question on building with green logs  (Read 6733 times)

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Offline Treeclimber

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Got a question on building with green logs
« on: February 29, 2016, 08:22:56 PM »
So I'm building a log cabin out of syp. IM almost done with all my walls I'm take tree sawing them Into 8x10 and stacking them on top of each other with butt and pass method all the wood is pretty green. I'm laying a bead of caulk inbetween the logs to seal out air. My question is will I tun into and kind of Rot or fungus growing in between the logs that I can't see were there sitting flat on each other? Thanks for help!

Offline Brad_bb

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Re: Got a question on building with green logs
« Reply #1 on: March 01, 2016, 08:49:18 AM »
Please read over your post.  I'm having trouble understanding " I'm take tree sawing them Into 8x10..."   and "My question is will I tun into and kind of Rot or fungus growing in between the logs that I can't see were there sitting flat on each other? "  I can't understand these parts due to mis-spelling and maybe wrong words or words missing?
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Offline Treeclimber

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Re: Got a question on building with green logs
« Reply #2 on: March 01, 2016, 09:54:38 AM »
Sorry bout that ha! So this is what I'm doing. I'm sawing syp into 8x10 cants then  Stacking them green on top of each other in butt and pass form. I've actually finished the walls. I'll be bleaching the outside and inside of logs then be  putting a borax solution on them. My question is about the surfaces where  the logs are touching each other in the stack. will there be a problem with Rot and fungus growing were logs are touching each other and can't be seen? I'll be getting a roof on soon so this should speed up drying rapidly but I know there is moisture there coming from logs as they dry.


Offline 1938farmall

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Re: Got a question on building with green logs
« Reply #3 on: March 01, 2016, 10:20:00 AM »
seems like you are pretty far along on your build to do much about the log joints.  imo, your best chance to keep weather out would be an extra large roof overhang.
aka oldnorskie

Offline starmac

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Re: Got a question on building with green logs
« Reply #4 on: March 01, 2016, 10:29:07 AM »
It sounds like he is talking more about moisture from green logs, not the weather.
I am wondering the same thing. I know many log cabins or houses has been built from green logs with no problem, but am wondering about the squared logs, as there is a lot more surface area to be touching.
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Offline Treeclimber

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Re: Got a question on building with green logs
« Reply #5 on: March 01, 2016, 05:21:12 PM »
Yes roof will have bout 2ft over hang and there will be porches on three sides I'm more concerned bout the moisture from the logs being green. Only thing between logs is a bead of caulk that runs on the outside edge.

Offline Treeclimber

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Re: Got a question on building with green logs
« Reply #6 on: March 01, 2016, 05:28:40 PM »
The logs have been getting rained on during the project but havnt had much issue with mold just some blue stain and a little mold that I've been spraying bleach on. It will soon have a roof on it wich will start the drying process. So if there is mold growing between the logs on the surface where they are contacting each other once the log walls dry out will this mold die or is it a concern?

Offline Treeclimber

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Re: Got a question on building with green logs
« Reply #7 on: March 01, 2016, 06:34:16 PM »
pics of the cabin are posted in my gallery

Offline Fundyheather

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Re: Got a question on building with green logs
« Reply #8 on: March 01, 2016, 07:21:30 PM »
The Finns old style log construction had the logs grooved out and bedded with damp moss in a moist climate with with no fungal problems noted.  Therefore I'd say get the roof on soon and some heat in there and expect everything should be fine.

Nice gallery and nice build you have going there. 
Good luck with it.   

Offline fishfighter

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Re: Got a question on building with green logs
« Reply #9 on: March 01, 2016, 09:30:13 PM »
I had nailed down some green SYP subfloor on the camp I'm building. I was thinking I might have a chance of mold growing in between floorings, so I pulled up a couple to check after about two months of drying. All was good.

Offline Magicman

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Re: Got a question on building with green logs
« Reply #10 on: March 02, 2016, 09:23:51 AM »
Welcome to the Forestry Forum, Treeclimber.  How about adding your town/location to your profile so that we will know.   :)
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Offline Seaman

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Re: Got a question on building with green logs
« Reply #11 on: March 04, 2016, 07:32:06 AM »
I love it !  Cannot help with your question, except all the log cabins put up around here 200 years were put up quick, and lasted a long time.
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Offline 69bronco

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Re: Got a question on building with green logs
« Reply #12 on: March 04, 2016, 07:52:37 AM »
Can't help with the mold issue, but your build looks great! How are you anchoring the logs?

Offline Brad_bb

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Re: Got a question on building with green logs
« Reply #13 on: March 04, 2016, 09:27:46 AM »
I have never done what you're doing or any log building.  The only thing I can say from my experience is that moisture with some sap (food source) in a dark place is a good environment for mold growth.  Once the moisture level drops enough it won't be.  I had some freshly peeled spruce logs that I put right in my dark shed, and they grew mold on the surface.  I was able to remove it with a 5% bleach solution from a garden sprayer.  Had I let the logs dry enough on the outside, it probably would not have done that.  I did the bleach cleaning several weeks after I noticed the mold.  By that time the logs were dry enough on the outside that it was no longer growing.  So once I sprayed the bleach solution to remove the mold, it was too dry for it to return. 

Given that experience, I would think it you had your timbers outside for a couple weeks before building with them, they would probably be dry enough that they wouldn't mold.  I would not caulk/chink the logs immediately to give them enough time to surface dry.

Just curious, are you sealing the end grain of the logs with Anchorseal?  So that they will dry more evenly?
Anything someone can design, I can sure figure out how to fix!
If I say it\\\\\\\'s going to take so long, multiply that by at least 3!

Offline Treeclimber

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Re: Got a question on building with green logs
« Reply #14 on: March 07, 2016, 02:33:54 PM »
The logs are being anchored with oly log home screws bout every 18 inches.... I'm not sealing end grain with anything but Thompson water seal syp doesn't check to bad what I've observed and been told

Offline scully

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Re: Got a question on building with green logs
« Reply #15 on: March 12, 2016, 07:54:57 AM »
I built my cabin out of green maple logs . I made 2 flat sides and spiked them with 1/2" rebar that I beat points onto . With shrinkage etc. they did real well ,my only trouble is powder post bore beattles  . I have done everything imaginable to kill them . The only thing I see that you maybe should not have done is caulk . It seems that may limit air drying . One thing I wish I would have done is cut a 2or3 inch deep kurf down the center of each  log ,I feel this would have helped over all drying etc . At the end of the day I can say I believe you will have a good cabin for a very long time . As for your post ...It's okay about wording and spelling I understood just fine. I can't spell worth a darn !
I bleed orange  .

Offline Treeclimber

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Re: Got a question on building with green logs
« Reply #16 on: May 08, 2016, 01:45:40 PM »
Any suggestion on whether I should go head and stain and seal the outsides? Logs have been stacked  for bout 3 months now. Or wait till the logs cure to under 20% moisture and then stain and seal  ..... This could take over a year what stain and sealant would yall use on syp to allow it to cure if this was best route

Offline barbender

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Re: Got a question on building with green logs
« Reply #17 on: May 08, 2016, 05:47:20 PM »
     You will get some fungus growing on the mating surfaces between green logs, but probably not enough to bother anything. That means, if you disassembled it, you would look between the logs and say "that mold and fungus is ugly!", but being that you're not, out of sight, out of mind ;)  Get a roof on it so it start drying, and it's not getting rained on to add more moisture.  I found that a solution of 20 mule team borax would kill fungus until rain washed it away, you could probably spray between logs as you are building.
Too many irons in the fire

Offline Treeclimber

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Re: Got a question on building with green logs
« Reply #18 on: May 08, 2016, 09:15:05 PM »
I've got roof on it. Logs moisture content are at bout 32%

Offline Fundyheather

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Re: Got a question on building with green logs
« Reply #19 on: May 09, 2016, 07:14:05 PM »
Good go!   
Hope you have time to show us a picture.


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