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Danimal
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# Posted: 9 May 2019 20:08
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Went today to see about a permit. We are in a flood plain along the river. Can't build where I wanted to. The closest I can be is too far for our liking. In 30 years I've never seen water within 100 foot of the planned build site.
However I can move a portable shed in with a permit they'll give me no problem? They say because in an emergency it could be moved. That changes everything I had planned.
Biggest concern right now is this. Ventilation to keep moisture away in winter months. I'll be there for weekends in cold weather and plan to have wood heat. There will be a metal roof with sheathing between that and inside. But there doesn't seem to be any soffit to vent through.
Anybody here dealt with this. I'm obviously a amateur. But would like to try to do as much as possible of the finish work myself.
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rockies
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# Posted: 9 May 2019 20:18
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What foundation did you plan on using?
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Danimal
Member
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# Posted: 9 May 2019 20:25 - Edited by: Danimal
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Sono tubes originally with a 20x20 garage kit. Now if I'm putting a portable down it'll be crushed stone base with cement blocks and the shabin (Shed/cabin) sitting on top.
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sparky30_06
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# Posted: 10 May 2019 07:51
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what about continuing your plan but build an elevated base the put your "portable shed" on top on the base. You can still slide it off and move it in an emergency.
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mj1angier
Member
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# Posted: 10 May 2019 09:59
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This what we are having to do also for out small cabin/ sheds. Area is in flood plain so cant be permanent building. We are putting 3 sheds 35 ft from our small creek. NC has newish law that permits are not needed for primitive camp structures - no plumping or grid power, so composting toilet and 12v solar. We are having shed company put them up on 18" block- allows ventilation/ air flow under build and another 20" above any possible floor water, lol. The folks that are building ours do put a ridge and soffit vent it. We will do the insulation and inside walls ourselves. Going to use 2"in foam board in roof and floors, batt in walls.
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razmichael
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# Posted: 10 May 2019 10:29
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Depends on your budget and climate but a "hot" roof using spray foam insulation would deal with the lack of roof venting and provide some great insulation (keeping the heat in during winter and heat out in summer). You need enough to ensure the dew point during winter is somewhere inside the foam. Any other method of trying to insulate and properly seal the roof is very difficult to ensure no leaks.
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mojo
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# Posted: 10 May 2019 11:59
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Ventilation shouldn't be a problem if you can keep moisture in the building, and like razmichael said, overcome the dew point.
I'm planning on building an unvented cathedral ceiling in my cabin.
https://www.buildingscience.com/documents/digests/bsd-149-unvented-roof-assemblies-fo r-all-climates
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RiverCabin
Member
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# Posted: 10 May 2019 14:24
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Always remember, it's easier to get forgiveness than permission. From your posts, it seems you have 60 acres. I probably would have gone ahead and built and said forget the permit. Where I live, county building permits serve only to notify the assessor to inspect the property and raise your taxes.
My cabin is less than 100 feet from a river and certainly is on a flood plain. I built it and never notified the county. They eventually noticed however and quadrupled my tax bill.
My cabin started as a prebuilt shed on a slab and it has worked fine. Certainly stick built is preferable but I don't think you will lose much by going prebuilt.
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razmichael
Member
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# Posted: 10 May 2019 16:58
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Danimal, Mojo, couple of pics of my Gambrel sprayed ceiling. 
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rockies
Member
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# Posted: 10 May 2019 19:45
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A lot of people find the most beautiful spot on their property and then build the cabin there. Of course, in doing so they destroy the natural beauty.
If you can, find the ugliest spot on the property and build there. Then you will have erased that spot from existence and you can still look at the beautiful spot.
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Danimal
Member
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# Posted: 11 May 2019 09:14
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So if I understand this right... If I spray foam the ceiling with closed cell insulation I don't need to ventilate? Thanks for the responses btw!
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razmichael
Member
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# Posted: 11 May 2019 17:51
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Basically but read the link mojo posted or google hot roof.
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