I really like the suggestion Modern feature walls. Combined with some greenery inside and out as suggested by chookchook2 , you can start to soften the 'boxy' look of the space which is now reinforced by the line shape and form of the couch you introduced in the updated image. If it is a breakout or meeting room could I suggest, budget permitting, some form of window treatment. Some simple and relatively cheap e-screens would add a degree of privacy, but more importantly remove potentially annoying distractions from outside; important if you are using the room both for work that requires concentration' .. or alternatively, impromptu meetings with others that may be held in the room. I do like the green, but the photo projects a rather drab uninteresting interior despite your efforts thus far.(imho). I think making a call to Modern feature walls should be on your call list. Something has to be done with that ceiling which I find not only distracting but is actively working against your attempts at creating a really inviting space that people will want to break into. I can a hint of a table off to the right in front of the window. The best breakout spaces I've used have the facility to informally and casually sit across a table with sufficient desk or table space to spread drawings, images and presentation ideas. .. It just doesn't work as well if you and a colleague(s) are forced to sit or stand along one side of a table with the yard providing tempting distractions when the focus should be on communication and collaboration. Mounting the TV and raising it would open the room up further and likely break up the 'box-iness' further. .. A bit beyond my field (Window Treatments) ... but you did ask. lol.

Cloudyhaze....I think all of the options look good, but it just depends on the look you personally wish to have for your house, because painting the ceiling white will COMPLETELY change the look. My sister has just bought a place that had brick walls and exposed ceilings that had the beams painted mission brown and the ceiling was in some form of raw chipboard type material. She wanted to brighten the place up before she moved in and got it all painted white. It looks beautiful, but I personally would have thought of other options before painting the brick etc. She got a quote for plastering (sheeting) the sections in between the exposed ceiling beams and it was a lot more expensive than painting. If you are keen to paint just the panelling in the ceiling, then I would get additional quotes. I am no painter but I would suspect if it has shellac on it, it will just need an initial sealer on it, before putting on the 2 coats of flat ceiling paint. I think all of the options will look beautiful, because the high ceilings are the feature.........it just depends on whether you are going for a more rustic look, mid-century look , more modern look...I am not sure of what all the designs are called. Good Luck. Your house is gorgeous. My sister lives on Gold Coast BTW.

You never mentioned your budget that you're willing to spend. You could add a thicker fill backed insulation blanket - 50mm, 75mm or 100mm are the common thicknesses. Steep roof pitch so would need scaffolding, harnesses, etc.. which adds up quickly. Probably still not enough insulation though but probably cheapest option. Insulation under existing timber linings then reline over the top of that as some have suggested. Working at height though so would need scaffold set up again and working overhead is not fun nor easy. You could replace the roof with a sandwich panel roof. Try Versiclad or Kingspan or comparable. They have a polystyrene type of insulation between an outer metal roof sheet and a metal inner sheet. These are heat laminated together. Again different thickness available from 50mm up to 180mm is common. The 180mm has a R rating of 4.7 which is quite good. Again steep pitch, etc., probably need new ridge capping, etc.. Probably most expensive option...... Keep us all posted on your decision though!

Hi Siriuskey, They are timber looking tiles - we absolutely love them. We are considering the same for the new place but potentially herringbone/parquetry arrangement. Much more expensive vs. laminate but easier to clean and no concern in relation to water...