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Log building

Started by Mainecoast, September 26, 2021, 07:30:02 PM

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Coastallogger

Quote from: doc henderson on October 06, 2021, 07:41:48 AM
Quote from: Coastallogger on October 05, 2021, 12:39:40 PM

So in theory, I can fell the tree, cut it to length on the spot, mill the sides off on the spot with my edging mill, move it out of the woods, get it on a cart and hand tow it to the sawhorses, get it on the horse, peel it, and cut the notches, then hoist it directly in place, handling it twice only.

well I did a smiley face.   :)  sounds great and I was referring to your narrative and the list of processes.  so I guess it depends on what you definition of "handle" is.  you sound ambitious.  so it may only seem like twice to you.  I was having a little fun as an old guy.  cheers!  keep us in the loop, and will like to see pictures.  I agree with only moving the logs as is needed.
Appreciate it. Good to hear I am not crazy thinking of doing it this way. I always get suspicious of my method when I don't see anybody else doing it that way.
For sure I am ambitious. Want to do it without a tractor or ATV as well. Not sure if I am TOO ambitious. Time will tell. Would rather be humbled than lazy. Will keep you folks updated. The first tree falls in just a couple of weeks. 
Building 20X20 dovetail log cabin off grid.

Mainecoast

Stephen1- I like you're method. It's what I've been striving to do for a few years now. But I keep on taking on conventional building projects or cabinets and then another year goes by and no log building has been done. I'd love to cut in the work yard..load up and deliver to the site. I'm also thinking hybrid buildings would be desirable..traditional walls and a timber or log roof. 

There is a log builder down the road about 45 minutes. They have a small crew and full scribe the cabins..I haven't reached out to them yet because I'm not sure I can take the pay cut to go get a "job" but maybe 6 months would teach me enough. 

Coastallogger

Thanks. I did it.

I will get a social going on at some point for the build and will link it there.
Building 20X20 dovetail log cabin off grid.

Joe Hillmann

Quote from: Coastallogger on October 05, 2021, 12:39:40 PM

I am avoiding the full scribe method mainly due to time and the fact that I don't have machinery to handle the logs for me, and I want to minimize handling and time spent on the project generally.
I am going with dovetail so nothing needs to be scribed or fitted. The notches are layed out with math.
So in theory, I can fell the tree, cut it to length on the spot, mill the sides off on the spot with my edging mill, move it out of the woods, get it on a cart and hand tow it to the sawhorses, get it on the horse, peel it, and cut the notches, then hoist it directly in place, handling it twice only.

Would you say that method would save a lot of time compared to full scribe?
I am doing something similar, but I promise, that will feel like way more than two steps.  I am cutting the trees, dragging them to the mill, bucking them to length, lining them up with the mill, rolling them on to the mill, milling them, peeling it(depending on the time of year this can take minutes per 30 foot log or hours).  Once milled, I move them to a trailer or the ground, from there to the pile to dry.
In your case you would pile them directly onto the house.  But that requires all your logs being from the same place and close to where you are building.
Trees aren't as straight as they appear.  A tree that looks straight as a gun barrel may have a 10 inch bend it it end to end so you will have to cut it into two shorter logs to make it work between windows instead of as your first full length log.  They have rot you can't see from the ground, they may get to be too small of diameter as you get to the very end.
I have about 12 logs that I have a specific spot for.  The rest are just going to be puzzle fitted into place where they work the best between windows and doors.  When I was in the woods I just cut the longest straightest sections I could with what I had to work with.
And the biggest reason (for me) not to build it as I cut the logs is time.  It took me a bit over a year (I started August 9, 2020 and just covered my finished milled log pile in the middle of September 2021)  I would assume if I was also building the cabin at the same time I could double that time frame.  I would be very concerned about my lower courses of logs, and my first floor floor joists being exposed to the weather for 2+ years.  Some of my logs were exposed through the winter and just now got covered, it really bothered me for them to be exposed throughout the summer, they darkened, didn't dry and began growing mushrooms. I am working full time and then some so if you average it out over the entire year I probably was only able to work on the cabin for 2 hours a day(712 hours total).  If I had a few months off of work I could have made much faster progress.
By the time I have the cabin built I figure I will have moved each log by hand 10 plus times.  I also figure what I took out of the woods was over 100,000 pounds, what I have in my stacked pile now is about 70,000 pounds and once it is all dry it will be closer to 40,000 pounds.  That is a lot of weight to move,  The only time it wasn't moved totally by hand was from the woods to the log pile, my tractor and winch did that.
Drying all the logs first has given me time to change my plans based on what I have learned while working on them and based on what material I finally end up with.  If you start building from day one your logs have to match the plan instead of the plan matching the logs, which can be a good or bad thing. 
When I am stacking my logs on the cabin the logs should weigh half of what they weigh now, and the final shrinkage once the cabin is built should be less.

Coastallogger

Quote from: Joe Hillmann on October 07, 2021, 10:18:30 AM
Quote from: Coastallogger on October 05, 2021, 12:39:40 PM

I am avoiding the full scribe method mainly due to time and the fact that I don't have machinery to handle the logs for me, and I want to minimize handling and time spent on the project generally.
I am going with dovetail so nothing needs to be scribed or fitted. The notches are layed out with math.
So in theory, I can fell the tree, cut it to length on the spot, mill the sides off on the spot with my edging mill, move it out of the woods, get it on a cart and hand tow it to the sawhorses, get it on the horse, peel it, and cut the notches, then hoist it directly in place, handling it twice only.

Would you say that method would save a lot of time compared to full scribe?
I am doing something similar, but I promise, that will feel like way more than two steps.  I am cutting the trees, dragging them to the mill, bucking them to length, lining them up with the mill, rolling them on to the mill, milling them, peeling it(depending on the time of year this can take minutes per 30 foot log or hours).  Once milled, I move them to a trailer or the ground, from there to the pile to dry.
In your case you would pile them directly onto the house.  But that requires all your logs being from the same place and close to where you are building.
Trees aren't as straight as they appear.  A tree that looks straight as a gun barrel may have a 10 inch bend it it end to end so you will have to cut it into two shorter logs to make it work between windows instead of as your first full length log.  They have rot you can't see from the ground, they may get to be too small of diameter as you get to the very end.
I have about 12 logs that I have a specific spot for.  The rest are just going to be puzzle fitted into place where they work the best between windows and doors.  When I was in the woods I just cut the longest straightest sections I could with what I had to work with.
And the biggest reason (for me) not to build it as I cut the logs is time.  It took me a bit over a year (I started August 9, 2020 and just covered my finished milled log pile in the middle of September 2021)  I would assume if I was also building the cabin at the same time I could double that time frame.  I would be very concerned about my lower courses of logs, and my first floor floor joists being exposed to the weather for 2+ years.  Some of my logs were exposed through the winter and just now got covered, it really bothered me for them to be exposed throughout the summer, they darkened, didn't dry and began growing mushrooms. I am working full time and then some so if you average it out over the entire year I probably was only able to work on the cabin for 2 hours a day(712 hours total).  If I had a few months off of work I could have made much faster progress.
By the time I have the cabin built I figure I will have moved each log by hand 10 plus times.  I also figure what I took out of the woods was over 100,000 pounds, what I have in my stacked pile now is about 70,000 pounds and once it is all dry it will be closer to 40,000 pounds.  That is a lot of weight to move,  The only time it wasn't moved totally by hand was from the woods to the log pile, my tractor and winch did that.
Drying all the logs first has given me time to change my plans based on what I have learned while working on them and based on what material I finally end up with.  If you start building from day one your logs have to match the plan instead of the plan matching the logs, which can be a good or bad thing.  
When I am stacking my logs on the cabin the logs should weigh half of what they weigh now, and the final shrinkage once the cabin is built should be less.
Thanks Joe,
Very helpful response. 
What was the size of your cabin? The bigger the cabin I imagine the bigger the issue with curvature is. Mine is 20x20.

The cabin is being built with a passive solar design, so windows are a critical element in the build, so unfortunately they will be the boss of the logs.

However, I am designing the windows and doors as to minimize the amount of full length logs in the build specifically to minimize handling problems since I am doing it without machinery.

I have also designed the floor system to go in last for the reasons you mentioned, plus my tripod hoist for the walls will be easier to maneuver, plus I am using bubble foil insulation below the floorboards and that will trap water, so joists and floor go on after roof and windows.

Another critical difference is I will be working on it full time.

Another is that I am using a chainsaw edging mill, so I can mill the sides off and buck to length where the tree falls, before I handle it even once. I feel that also will also minimize the peeling required because I will be building over winter when peeling is hard.

It will grey a bit as I build, but I will be giving it a go over with a flap sander or brush on an angle grinder to brighten it up before sealing it once it's dried in.

Interesting on your timeline. That is the biggest unknown for me here! Which is critical because I am roughing it until I move in.

Thanks again!
Building 20X20 dovetail log cabin off grid.

Joe Hillmann

Quote from: Coastallogger on October 07, 2021, 02:56:14 PM
Thanks Joe,
Very helpful response.
What was the size of your cabin? The bigger the cabin I imagine the bigger the issue with curvature is. Mine is 20x20.

The cabin is being built with a passive solar design, so windows are a critical element in the build, so unfortunately they will be the boss of the logs.

However, I am designing the windows and doors as to minimize the amount of full length logs in the build specifically to minimize handling problems since I am doing it without machinery.

I have also designed the floor system to go in last for the reasons you mentioned, plus my tripod hoist for the walls will be easier to maneuver, plus I am using bubble foil insulation below the floorboards and that will trap water, so joists and floor go on after roof and windows.

Another critical difference is I will be working on it full time.

Another is that I am using a chainsaw edging mill, so I can mill the sides off and buck to length where the tree falls, before I handle it even once. I feel that also will also minimize the peeling required because I will be building over winter when peeling is hard.

It will grey a bit as I build, but I will be giving it a go over with a flap sander or brush on an angle grinder to brighten it up before sealing it once it's dried in.

Interesting on your timeline. That is the biggest unknown for me here! Which is critical because I am roughing it until I move in.

Thanks again!
I am not sure on the size of the cabin yet.  The original plan was 20 x 30 with a 10 foot porch on the front and back.  But I have enough long logs to go 22x 32 and my rafters will be long enough if I go from a 12/12 to 8/12 pitch and almost all of my floor joists are 11'6" so they will be long enough too.  I have also changed the plan from a porch on 2 sides to a porch on 4 sides to protect the logs better.  I also changed the plan for the roof to start at the second floor to adding 3 or 4 rows of logs(depending on what I have left above the top floor floor joists.  I originally planned to stack it log on log but now I intend to put a 1 1/2 to 2 inch spacer between each row.  That will allow me to have the large cement chinking I want, it means I don't have to remill each log to straighten them back out after drying and it gives me an extra 2 1/2 feet of wall height with the same amount of logs.
My placement of windows and doors is based roughly on where I think I want them and the rest will be based on what I can get cheap.  I had agreed to buy windows that I thought would be perfect for my needs this spring but when building material prices went up they decided not to replace their windows.  And since then nothing was quite what I was looking for.  I actually agreed to buy some last week that I figured were cheap enough to be a back up in case I can't find what I actually want but the guy contacted me on the day I was supposed to pick them up and raise the price.  He said he has several others willing to pay full price.  But I see his ad is still up, so who knows what will happen there.  At this point I am thinking of making my own windows and doors.
Actually higher prices for building materials this last winter and summer brought the price of my cabin way down.  Originally I planned to buy my floor joists, rafters and sheeting for the roof, subfloors and floors.  But prices got so high I decided to mill my own so that brought my cost way down.
In my case the fist floor floor joists almost HAVE to go in with the second layer of logs because I am using log joists.  I am sure they could be fitted later but it would be much more difficult

Coastallogger

Quote from: Joe Hillmann on October 07, 2021, 04:08:53 PM
Quote from: Coastallogger on October 07, 2021, 02:56:14 PM
Thanks Joe,
Very helpful response.
What was the size of your cabin? The bigger the cabin I imagine the bigger the issue with curvature is. Mine is 20x20.

The cabin is being built with a passive solar design, so windows are a critical element in the build, so unfortunately they will be the boss of the logs.

However, I am designing the windows and doors as to minimize the amount of full length logs in the build specifically to minimize handling problems since I am doing it without machinery.

I have also designed the floor system to go in last for the reasons you mentioned, plus my tripod hoist for the walls will be easier to maneuver, plus I am using bubble foil insulation below the floorboards and that will trap water, so joists and floor go on after roof and windows.

Another critical difference is I will be working on it full time.

Another is that I am using a chainsaw edging mill, so I can mill the sides off and buck to length where the tree falls, before I handle it even once. I feel that also will also minimize the peeling required because I will be building over winter when peeling is hard.

It will grey a bit as I build, but I will be giving it a go over with a flap sander or brush on an angle grinder to brighten it up before sealing it once it's dried in.

Interesting on your timeline. That is the biggest unknown for me here! Which is critical because I am roughing it until I move in.

Thanks again!
I am not sure on the size of the cabin yet.  The original plan was 20 x 30 with a 10 foot porch on the front and back.  But I have enough long logs to go 22x 32 and my rafters will be long enough if I go from a 12/12 to 8/12 pitch and almost all of my floor joists are 11'6" so they will be long enough too.  I have also changed the plan from a porch on 2 sides to a porch on 4 sides to protect the logs better.  I also changed the plan for the roof to start at the second floor to adding 3 or 4 rows of logs(depending on what I have left above the top floor floor joists.  I originally planned to stack it log on log but now I intend to put a 1 1/2 to 2 inch spacer between each row.  That will allow me to have the large cement chinking I want, it means I don't have to remill each log to straighten them back out after drying and it gives me an extra 2 1/2 feet of wall height with the same amount of logs.
My placement of windows and doors is based roughly on where I think I want them and the rest will be based on what I can get cheap.  I had agreed to buy windows that I thought would be perfect for my needs this spring but when building material prices went up they decided not to replace their windows.  And since then nothing was quite what I was looking for.  I actually agreed to buy some last week that I figured were cheap enough to be a back up in case I can't find what I actually want but the guy contacted me on the day I was supposed to pick them up and raise the price.  He said he has several others willing to pay full price.  But I see his ad is still up, so who knows what will happen there.  At this point I am thinking of making my own windows and doors.
Actually higher prices for building materials this last winter and summer brought the price of my cabin way down.  Originally I planned to buy my floor joists, rafters and sheeting for the roof, subfloors and floors.  But prices got so high I decided to mill my own so that brought my cost way down.
In my case the fist floor floor joists almost HAVE to go in with the second layer of logs because I am using log joists.  I am sure they could be fitted later but it would be much more difficult
Wrap-around porches are really nice. Can screen em in for use as a bedroom when too hot inside. The trade-off is it makes the cabin dark. I plan on fixing that by finishing the floors with danish soap, which gives it a white translucent finish.
I am the same as you. I intended on making my floor joists out of dimensional lumber as well to save time. But when my 3/4 in T&G plywood hit 60.00 a sheet, I had another look and changed plans to a log system as well. 
I am still putting them in last though. I am making my piers wider than the bottom plate logs so I can rest my log joist system on them completely separate from the bottom course of logs. Maybe not even fastened to the bottom course of logs. They don't need to be pocketed into the bottom plate logs. In fact, I think it's best if they aren't. I am reading from Alaskan experience that warm moist cabin air can make its way into pockets cut into the logs, where it condenses because it is closer to the outside and colder. Then your logs can rot. Since I am using it in the winter in a cold climate, I will need to put a vapor barrier between every pocket I cut into logs and the inside. I could do that but it will come loose with log movement over the seasons so best not to rely on that. The bottom plate is the hardest to replace if it rots.

Then if the floor joists rot any time, I can just go under and replace them one by one without tearing everything down.

I think you made the right choice going with a rounded log on the top and bottom. Saves a ton of work logging and I think it is more durable too. Flat on flat has major issues with trapping moisture and rotting. And I see a lot of people end up having to chink it in the end as well as it never seems to stay perfectly in contact. And then it looks sillier than if it has the normal-sized chinking anyways.

Building 20X20 dovetail log cabin off grid.

Joe Hillmann

Darkness due to the porches is for sure a concern.  But our current housing situation only has windows on one side.  So all the bedrooms, kitchen and dining room have no windows.  We have adapted to it.  So even if the new house is dark by most peoples standards I am pretty sure it will have more natural light than our current place.  And if it really is a problem, I can make the porches smaller, cut in bigger windows, put in skylights or light tubes.

The porch to the south I intend to cover completely in glass(that can be opened so it is mostly shaded in the summer and traps heat in the winter to help passively heat the house.  The north and west porches may eventually be walled and glassed in to give us more storage space. 
And the east porch won't have any floor but dirt so I can use it as a carport now and in the future if I put a basement under the cabin can have the option to make that side a walkout or a partial walk out.

For now I am putting it on piers but with the plan that I may eventually put a basement under it so the piers will go deeper than the eventual basement foundation will be.  That way if I do put a basement I never have to support more than a couple feet of the house when I start removing piers, digging out the basement and putting up walls.

I never heard of the danish soap finish.  I'll look into it.

Coastallogger

Joe I really like that porch plan! Would love to follow your build.

FYI Danish soap can be expensive because it's not common in North America, but historically, it was made DIY, it has fairly simple ingredients. Feels nice and warm on the feet too compared to oil or poly finishes.

Nice in a cabin to have a contrast where everything tends to be the same wood color, but still keep the rustic natural look of the woodgrain showing through.
Building 20X20 dovetail log cabin off grid.

Mainecoast

Hey not to be a buzz kill but maybe start a new thread called ideas on building my cabin. 

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