Oak Timber frame (and formally a Diminished stile door (markup and cutting the diminished part?))

[meccarroll]

Interesting jointing system at the wall plate junction. The structure should stand for a few hundread year if left alone.

 

[Mike G]

Interesting jointing system at the wall plate junction. The structure should stand for a few hundread year if left alone.

A huge contribution to that is the fact that the sole plate is up off the ground. It's longevity, though, is going to depend on maintenance of the roof. So many outbuildings fail because no-one looks after their rooves.

 

[Planeiron]

Sarking boards seem to be a thing in more northern areas. I think they're common in Scotland and in some houses of a certain vintage in Northern Ireland possibly from Scottish influence. Sawyer had some Douglas fir boards in various widths and just over 1" thick so this really stiffened the roof even more. Every one of these boards and all the visible faces of all the oak timbers were dressed roughly with a scrub plane by hand to give a scalloped textured finish and take out any milling bandsaw marks (this is visible as a diagonal plane mark so I didn't need to worry too much about tear out). The Dougie went on green so was butted tight (each board sash clamped to the next) and fixed in place.




And a VCL membrane on providing temporary weathering. You can see the 3 false rafter tails on this side in line with the trusses. These are relatively newly planed and lightly coloured while the other rafter tails are already rapidly greying from the atrocious weather that I seemed to attract when doing this job.

A huge contribution to that is the fact that the sole plate is up off the ground. It's longevity, though, is going to depend on maintenance of the roof. So many outbuildings fail because no-one looks after their rooves.

The sole plate gave me a lot to think about. Under the 6 main posts are small brick piers. These bricks apparently don't suck up as much moisture as a regular brick but I also placed slate between the oak and bricks and also bit of DPM. I knew this would sit for a while until I started siding so wanted to minimise water getting onto the piers and under the oak. The small strip of wood is just old tanalised stuff to separate the oak from the lead: I think I read somewhere that they can react with eachother when the oak is green. Lead fixed with copper nails. The thickness of the tanalised wood matched the internal T&G pine boards so I could rest these on this little ledge while I fixed in place. This little strip also allowed stainless mesh to be attached to fix to the top of the dwarf stone curtain wall.The step in the wall beyond the frame is intentional so accomodate insulation, battens, counterbattens and siding later on.



This was a special moment. Finally felt I was getting somewhere. The actual timber framing goes quickly and is great fun. All the extra additional bits take a huge amount of time especially when factoring in all the reading and agonising on detail I tend to do.

 

[Cabinetman]

Grrrrr, want to get my teeth into one!

 

[Accipiter]

If I was younger... looks fantastic

 

[Planeiron]

Next bit not so much fun and very functional but important to weatherproof the building. VCL (green) goes around the entire builing and joins to roof VCL where possible. The sarking visible is very short boards just at the end so the membrane goes up and under and then over to join the green membrane on the roof



Then woodfibre insultation (very minimal in this case) over the roof and walls and starting to fit decorative trim



Green tarp on the right is covering the entire exposed gable end as this will be all glass





Then breather membrane (blue) goes over roof and walls and is battened and counterbattened



And then you tuen around and find you're gently reminded that you said you'd scythe an area to encourage wild flowers. The stainless steel mesh will attach to cladding to help prevent rodents etc moving into the gap that will be formed

 

[NickM]

Love the scythe!

 

[AndyP]

Love the scythe!

Not seen one with adjustable handles like that.

 

[Planeiron]

This is an Austrian scythe. Having picked up my grandfather's old traditional scythe which is more nicely made but very heavy, this new one is much lighter and nicer to swing. Still, its only about 5 minutes before I'm wrecked. Good workout though.

 

[AJB Temple]

Superb thread - which I almost didn't see as I thought it was about doors and I am sick of making oak doors! Loverly framing quality. I've done several oak framed things....and made mistakes on all of them. That structure would take a clay tile roof with no problem I think. For our outdoor kitchen which is a similar sort of size - but a different roof structure to avoid tie beams, I did the roof with shingles. I wish I had used sarking actually. I rushed the job a bit whereas you are taking your time.

 

[Planeiron]

Outdoor kitchen sounds great. I'll bet thats an amazing looking feature. Seriously considered shingles.

 

[Planeiron]

Once the building was fairly well protected it was time to sort out the glass gable wall. I think the most widely accepted way to do this is to allow the glass to "float" on the outside of the timbers. Fixing within the frame can be done but is risky due to shrinkage. Placing glass on the outside allows the frame to move while the glass should be unaffected. When I lifted the tarp I was annoyed to find that the 2 small posts in the picture were no longer fully contacting the sill. Probably a combination of sill shrinkage, maybe a bit of sag and maybe tie shrinkage above (these 2 posts are pinned above but not to the plate. I built a small stone and brick pier in the centre on the inside to help prevent any further possible sagging.

The sill needed a bit of planing in situ to get it closer to flush with the rest of the frame. The only certainty in a job like this is you'll have to deal with the unexpected or be prepared to change plans.



The main thing in building up the glass is to think how the rain will run off so best to start at the bottom and overlap each component as you head upwards. Copper is a good friend for oak.



Once the copper is fixed then the glass needs a little ledge to rest on



Rubber glazing strips are placed between glass and frame. I would have prefered to use compriband (that's all I know it as) (couldn't source any at the time) as it's much more forgiving and conforms much better to any undulations and lack of flushness. See how much the copper starts to change colour as the tannins run.



Then another strip of rubber on the outside of the glass and a capping board on top just done up enough and no more to hold the glass. Best use the heaviest gauge stainless screws you can find here and properly predrill (I also dip all these particular screws in grease). Just in case these boards ever need to come off: stainless screws can be brittle and snapping a head is no fun



A bottom capping board isn't needed at all but in my design would look unfinished. Some people just support the glass at either bottom edge and cover that with the vertical capping board. No bottom board is a better design as rain runs straight off. If using a bottom cap, make sure to have the rubber sitting a little proud. You can also plain the back of the board so it contacts the glass as the top only (the way you'd plain a bolection moulding).

Put a drip edge on everything and repeat for the next level up.



This was great to get done so I had loads of natural light to work in. All the capping boards were fallings from large timbers from a previous frame.

 

[Planeiron]

With the outside weatherproof, i needed the subfloor sorted so I could work inside. This has a suspended floor over a void with good cross flow of air. You could of course dpm and pour a slab but I wanted to avoid concrete and plastic as much as possible and this is a well established technique plus gives you a potential extra storage area. All that air also means that the sill can stay nice and dry. What you can't see here is the stainless steel mesh that's attached from sill to the top of the dwarf curtain wall the entire way around except under the 6 posts. Mesh is embedded in lime mortar on top of the wall.

All the rest of this subfloor work should have been done before anything else as I had to lift all materials inside which wasn't fun. Stones are what we call crusher run locally. Gives a good base to support further materials


Next comes paving which I've done lots of before and quite enjoy. These are all left over materials from other jobs and all once had a life elsewhere. Bricks are bedded in a rough semidry 1 in 6 mix if anyone wants to know. Really easy to work with and will go off very slowly. All mixing done in the wheelbarrow. The mix for the bedding under the flag pavers is mostly gritsand with a splinkling of lime






I know no one will ever see the floor in real life but I still fell it was worth it. Is a great physical barrier though not water impermeable. Still, has stayed bone dry through constant wet weather and a saturated water table. I think this is in part making sure the guttering takes the rain away from the perimeter.

 

[duke]

Are the bricks you used reclaimed?

 

[Planeiron]

Yes, old imperial size solids. Reclaimed from old demolitions/renovations and then left over from other completed projects. Just had the right amount to fill the space between bricks and flags. The big stones are from an old farm building a few fields away. Tried to keep things as local as possible.

 

[BigMonka]

That's wonderful paving for something that will presumably never be visible once the suspended floor is in! Why not just leave it as the crusher run? Although having seen the rest of your attention to detail in the build I suspect the answer will just be that you wanted it done nicely for your own satisfaction.

 

[Cabinetman]

Most impressed with the underfloor. So it’s all laid on a dry mix and it’ll go off in its own time? Can’t imagine how you’ve managed to do it so neatly.

 

[Planeiron]

That's wonderful paving for something that will presumably never be visible once the suspended floor is in! Why not just leave it as the crusher run? Although having seen the rest of your attention to detail in the build I suspect the answer will just be that you wanted it done nicely for your own satisfaction.

Thanks, yes only a tiny amount of it is easily seen once the floor is on: completely unnecessary and crusher run would've been grand alone but I had the bricks and flags lying around and enjoy a bit of paving

Most impressed with the underfloor. So it’s all laid on a dry mix and it’ll go off in its own time? Can’t imagine how you’ve managed to do it so neatly.

Exactly, it's a weakish mix but would be completely the job for a garden and normal footfall. I've laid a fair few granite setts in the past and this mix lets you change the bedding level to account for differences in material dimensions so I've got used to it. Without the water added you've time to adjust etc without worrying about the mix going off. Also much easier on the back to mix by hand (should've bought a mixer years ago). Goes off slowly with moisture in the sand and from the ground underneath. If the bricks didn't have the stone dwarf wall as an edge boundary then you'd make a wetter mix for the edge to form a haunch under normal circumstances.

A lot of what I know about paving is from https://www.pavingexpert.com/

 

[Planeiron]

So after the floor, it was getting to the recommended max time of exposure for the underlay and I wanted to enclose everything. Once batten and counterbattens were on then it was time to clad. The mesh will prevent bugs etc making a home behind the cladding.



I brought up all the siberian larch to the inside and started making chimneys. This was the last of this particular larch I could get due to the embargo. It would be fine put up as is but I fancied trying something new. The chimneys are for making burnt cladding and gives a good deep burn without using a load of propane (could manage without any at all but handy to have). I had 2 massive propane cannisters from our kitchen refurb a few years back so that was good. I tied these with wire to begin with but wet twine works just as well. a few blocks of scrapwood keep things lined up



Stuff the bottom with newspaper and let rip! Photo doesn't do it justice. The flame runs to the top of the boards (maybe 8 or 9 ft long). Burn time around 4 or 5 minutes takes about 1 or 2 mm off the thickness. Also removes the saw marks. The first few boards were a bit tentative and the burn too short. Although it gives a nice colour and flatter finish, it doesn't last and flakes off to reveal the bare wood underneath. The heavy burn finish is much more weather proof and long lasting though is fragile when handling so requires care.



Boards are separated (this is where string is better) and immediately doused in cold water

For the insect mesh, this is folded over the initial boards, stapled and then held in place by the top boards. For anyone doing this board on board pattern, board face orientation is important. You want to think about how the board will cup as the rings straighten out: the inner board should cup outwards and the outer boards should cup inwards. As the boards reach their preferred state then the contact between the boards should increase over time. Also a drip edge on the bottom.





Folded copper over the ends of the plates to prevent weather water damage

 

[Mike G]

You've jumped from British vernacular with the frame to SE Asian with the cladding. What lay behind that?

 

[Cabinetman]

Quite a lot of charring, not that I know anything about it lol, but a good description thanks.

 

[Planeiron]

You've jumped from British vernacular with the frame to SE Asian with the cladding. What lay behind that?

I suppose I like the appearance and don't mind mixing styles. I probably started seeing and reading up on this type of cladding a few years back and having done other types, wanted to give it a go. Maybe mixing styles is a thing here: Castle ward house in Co. Down has a classical front and the opposite side in gothic style. Suppose you can't see both at the same time!

 

[Planeiron]

Quick post. A little bit of detailing for fascia and guttering and a threshold step from a piece of slate found in the garden! (presume old fireplace hearth taken out during previous renovation and lucky find for me). Fascia boards are from left over douglas fir sarking with linseed oil paint. Dressed up with a bit of chisel work which became very repeatitive

 

[Cabinetman]

Repetitive, must be the understatement of the Month lol.
Looks really good though.