The Shed Room
The large dorma extension at the rear of the house has always been known as the “shed room” and the intention was to clad the interior with wood in homage to the sheds we live in and love.
The sheds themselves will come down as soon as the house is habitable ie the toilets and plumbing and heating all working.
We decided to leave the ceilings in here vaulted but thought that it might become a bit “woody” or “sauna” looking if we clad the whole thing in wood so a compromise was reached where the inner gable would be plaster and the three walls would be wood.
Here it is bare naked when first constructed

And here with its full outfit on apart from finishing under the eaves
Here is a side shot so you can get an idea of the angles and shapes of the roof and the amount of space it affords us inside

Here is the interior as it was and has been used for a while as a “Glamping” room when pals come to stay and is very popular.
The interior size is 4 meters by 4 meters and the window is 2 meters by 120cm

We have had to leave this bit of the insulation incomplete as it is where the flue form the log burner downstairs will exit the roof through one of those angled roof things. It will be a double skinned insulated stainless flue coming up from the fire which I have seen before that you can easily touch as they don’t get too hot.
A good mate of mine in the UK fitted a lovely wood burner into his lounge (which was in a small end of terrace place) by building an inglenook outside and then beating through to it. He then place d the wood burner in that and had one of those double skinned insulated stainless jobs running up the outside of the house.
The fire inside would be roaring but you could touch the flue outside with no burns. It is a great way of fitting a wood burner into a room if limited on space.
Anyway I digress

Here is my son and I installing the thick stuff (125mm) over the chevrons . Like the roof all over the house it is tiles hooked to batten, over a plastic membrane, over chevrons.
The insulation is 30mm Quinntherm between the chevrons (and level with the bottom of them) leaving a 25 to 30mm air gap above. The 125mm Quinntherm is screwed and counter-battened to the chevrons.
Then it is placo and followed by plaster. I have 180mm screws which means with the thickness of the batten 10mmm plus the insulation 125mm I have at least 35mm of screw holding into the chevron which is plenty.
You have to make sure you mark the run of the chevron well as with screws that long it can be easy to miss if you don’t have the drill at the perfect angle.
For the “must use breathable membrane” converts the air gap above the membrane and also below it ensures there is never any danger of condensation.
I am aware that some would prefer to use breathable membrane which is fine and dandy however with proper air-gaps there is no problem doing it the way we have.

This shows one side insulation complete and the other side not started.
The top end of the gable is made up of 22mm Douglas fir, membrane (roofing felt I had spare) then 10mm airgap, then 75mm of celotex, then multi layer foil (35mm) then 10mm air gap then placo.

This shows the Celotex/ Quinntherm going in on the side walls of the shed room.
The triangular gap leads down to the lounge and will be insulated with 100mm acoustic/thermal rockwool type stuff from the other side once the wood cladding is up inside the shed room.
The wall is made up of on the outside slate on batten over membrane (plastic) then 10mm air gap then 75mm celotex / Quinntherm then 35mm multi foil, then 10mm air gap, then 22mm douglas fir on inside.

Here you can see one of the walls and the lower end of the gable ready for the wood cladding on the inside, with the roof insulation above in place and waiting for the placo.

Now the ceiling gets it placo
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And the internal gable gets its placo

And the walls get their wood cladding (and before I have had chance to get any photos of the empty room it is full of stuff again ha ha



None of the beadings are in place yet until after we have skimmed the ceiling with plaster. (we are not fans of the taping and jointing malarkey and would rather have a proper coat of plaster) Once the ceiling is done and we have painted the beams the beading and fiddley bits would go in to tidy it up and finish the job.
The wood (Douglas fir) has been treated with 2 coats of 5 star wood preserver and has had 2 coats of Danish oil / thinners 50/50 mix and one neat coat.
It will probably get another neat coat or two once all the beadings are in place.

So there we are that’s the “shed room” 75% done . The window has been made in hard wood and is comprises of three even sized panes, with the outer two opening and we will be fitting that when I get home.
Cheers
Bentley