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Practical advise please- Building a Timber 'Cabin'

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Practical advise please- Building a Timber 'Cabin'

Postby oldclaypaws » Fri Oct 12, 2012 7:31 pm

Looking for some general advise and recommendations about this process for future project some time over the next couple of years. I'll tell you what I know, and be pleased to take on board all suggestions and pointers towards books, websites and designs.

Current situation; Got the woodland. Got 150 mature (bit crowded) oak trees, which need some selective thinning, mostly about a century old. Sorted the access, a mobile sawmill can now get in. Forestry commission happy. Got positive noises from the planners, no problems foreseen using prior notification on a fairly decent size wooden building for forestry purposes. Not in an AONB, National park, next to a dual carriageway or danger to incoming aircraft (?*!!$*!).

Pleased to learn there's a 75% chance of the (very limited number of) felled oaks coppicing after felling. Trying to do the Cabin from timber sourced from the wood. Have contacts with locals who've done green oak frames- trying to establish if we can do the whole thing in oak, including floors and cladding. There is overstood sweet chestnut coppice on site which would be great for roof shingles.

A big ?? is over seasoning of the oak is whether some could be planked up by a mobile saw mill and used after maybe a years air drying as the cladding and floors, or whether I'd need to use kiln dried timber purchased from suppliers. I know oak shifts a lot as it dries.

Thinking of standing the building off the ground, don't want to leave a 'footprint' of foundations.

Time is not in short supply, want to do it tastefully and with character rather than quickly and cheaply.

Anyone got experience, or pointers towards good reference material to digest please?
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Re: Practical advise please- Building a Timber 'Cabin'

Postby oldclaypaws » Sun Oct 14, 2012 10:22 am

Looks like I'm going to have to research this one myself, all I can hear from the Forum is the sound of the wind in the trees..........

What I've found out is oak shrinks a heck of a lot, takes longer than other woods. It only shrinks in the width, not length, but if you put down a green oak floor you'd end up with large gaps between the boards if it wasn't dried first. The sapwood has to be squared off as it'll rot outside, you just use the heartwood. Chainsaw mills eat wood, you lose a lot, whereas a band-saw Mill like a Woodmeiser has a cut of only about 2mm. Best time to fell is between December and late Feb (?). I believe Woodmeiser's can cost up to £600 / day to hire.

A chum who's a woodturner has offered to kiln dry and tongue and groove the boards, but its gonna cost, its all down to energy use; it takes several weeks at 30 degrees. He recommended Mike Abbotts green woodwork book as a good guide to the subject, but its out of print and expensive. There are a few 'building a retreat/cabin/off grid books, but what I was hoping to find it a basic guide to processing wood, joints, weather proofing, shingles, structural suggestions. Does such a thing exist, or is it all to be gleaned from odd conversations and snippets? Maybe I'd better make notes and write a book, or get a TV crew and team of 50 'helpers' to do it for me while mucking about with explosives and homebrew (are you listening Mr McCloud?)
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Re: Practical advise please- Building a Timber 'Cabin'

Postby Sparrowhatchforestry » Sun Oct 14, 2012 9:49 pm

Not sure of the size and volume of the Oak you are wanting to have felled. But it may be worth creating a cutting list of all the timber you need and approaching you local sawmiller, you may be able to exchange your timber in the round for some kiln dried/seasoned Oak from their stock.

As far as I am aware and from the small amount of green woodworking that I have done (Sweet Chestmut and Oak roundwood) the frame, Shingles and Cladding can be made from Green Oak. therefore only the flooring and pegs would need to be out of kiln dried.

I usually start with scale drawings then produce a cutting list and go from there, It would be worth working out the volumes of wood you have and the value etc.
www.Sparrowhatchforestry.co.uk
info@sparrowhatchforestry.co.uk
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Re: Practical advise please- Building a Timber 'Cabin'

Postby splodger » Mon Oct 15, 2012 7:01 am

oldclaypaws - i can't offer any practical advice myself - but my father has a wealth of knowledge and i am sure he would be delighted to discuss at length with you the hows and how nots of working with green wood etc and buildings in general.

he is not a computer user though (he can't even use a mobile phone properly :roll: ) and the info would be too complex for me to relay back to you - but if you really want to talk to somebody about this and other projects - you'd be more than welcome to visit him at our little patch of woodland and chat away to your hearts content.

we are on hampshire / wilts border if you'd like to (and have time) to arrange a visit :D
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Re: Practical advise please- Building a Timber 'Cabin'

Postby oldclaypaws » Mon Oct 15, 2012 11:19 am

Thanks for responses chaps, it fits with the snippets I've deduced to date. I believe Sweet chestnut shingles are as good as oak, maybe better as they are very easy to split. Yes, I think cladding could be green oak if there was a good overlap, but if it was affordable to kiln dry it and tongue and groove it, that would be more weather proof, and green waney edge oak would degrade- bugs would eat the sapwood in it over time.

Oak is a good commodity for barter and I'd hope parts of this project which require payment could be covered by oak being swapped for elbow grease, so to speak. Planning will require an estimate of number of beams and volume of wood required, guess it won't be tragic if we end up with a bit spare- the dining room needs a new floor.

I've ordered Rupert Newmans 'oak framed building book' for inspiration and to be able to know my Lintels from my Joists, always good to know what your chippy is talking about.

This is a long term project and tied in with my general management plan. There ain't no trees gonna hit the deck until I've taken on board lots of professional advice about levels of canopy cover, which trees if any to fell, replanting, costs and simple logistics like the best low impact way of getting the butts to the cutting area. Also the continuing Herculean task of de-brambling, I'll post an update on the bramble debate to vent my exaspiration with the botched coppicing job the council dig.

Appreciate the responses to date.
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Re: Practical advise please- Building a Timber 'Cabin'

Postby Hobby » Mon Oct 15, 2012 3:59 pm

Hi OCP
When you say " Got positive noises from the planners ", is it your idea to use the cabin for storage ?.
Surely they didn't give favourable vibes on a cabin for residence did they ?.
I only ask as I have long given up on the cabin in the woods idea, but this might just relight the fire within.
Rgds Hobby
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Re: Practical advise please- Building a Timber 'Cabin'

Postby oldclaypaws » Mon Oct 15, 2012 4:53 pm

As I'm not in an AONB or area with planning restrictions, and the wood is over one hectare, I'm allowed a 'hut', 'shed', 'cabin', call it what you will, for agricultural use- tool store and shelter. We have a perfectly good house two miles away, so won't be living in it and it'll be kitted out in a pretty 'rough' finish with a couple of chairs, table, and no utilities. Might spend the odd summer night in it after a long day in the woods finished off with a campfire and one too many glasses of wine for the road.

Perhaps when calling it a Cabin I gave the impression it was a dwelling, which it ain't. However it will be more solid than a 'shed' or 'store', which is a softwood box from B&Q for £200. I'm thinking a rather chunky oak structure which has a lot of character and will outlast us, to be used to spend long lunchbreaks in during forestry activities and when generally chilling. Let's call it a very useful versatile toolstore and shelter well within permitted development guidelines, but not a dwelling, officer.
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Re: Practical advise please- Building a Timber 'Cabin'

Postby Hobby » Mon Oct 15, 2012 5:30 pm

Oh I getcha !!!
I've already got one of those, just wondered if you knew something that I didn't regarding a planning loophole.
Good luck with it anyway
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Re: Practical advise please- Building a Timber 'Cabin'

Postby Rankinswood » Wed Apr 03, 2013 6:38 pm

Hi,

I've just come across a great post on The Oxfordshire Woodland Group forum where information on participating on a course to build a cruck framed woodland shelter with The Carpenters Fellowship has been posted at :-

http://oxfordshirewoodlandgroup.co.uk/f ... topic&t=73

Has anyone ever had a go at doing this kind of thing in their own woodland ?

Rankinswood
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Re: Practical advise please- Building a Timber 'Cabin'

Postby Rankinswood » Thu Apr 18, 2013 5:35 pm

Hi,

An update on this project has been posted at :-

Cruck Timber Conversion

where pictures of an Alaskan sawmill converting timbers for use in the Harcourt Arboretum cruck project have now been posted.

Rankinswood
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