To change to cavity doors you will need to remove the wall each side of the doors to accommodate the cavity housing. Normal sliding doors would make a difference but the problem with them is they never stay totally closed and they do become quite noisy and annoying. This problem also applies to double cavity doors. The other option is to use bi-fold doors, they won't intrude into the room as much. Do you really need two doors there at all and is the glass above the doorway necessary? My personal preference would be to fill it all in and just have the one door to the room. You could even re-use one of your doors.

we successfully used Sarlon roller blinds on the outside of windows...make sure the blind is held out from the window to maintain air flow We also created a screened outdoor room using black Sarlon cloth attached to frames enclosing a verandah (access through an old fashioned fly screen covered in Sarlon)...initially to keep out the sun but it also did a great job of keeping out bugs and keeping inside warmer in cold weather..the black Sarlon has the effect of looking through fly screens thus improving the view looking out and obscuring the view looking in during the day...i suggest you double check the use of double glazing in the tropics as you need to allow heat to escape overnight and a window covering would be better on the inside to keep heat in during short periods of cold weather

FormFunctionNT I love your lego door! So innovative. This idea may be a little busy for the other door, but just putting it out there... You fill it with squares of the 4 colours, but randomly leave 4 blank. Almost like 4 have left and moved 'next door' if you'll pardon the pun! Sorry, I couldn't help myself.

I'm not a huge fan of the door. I'm thinking I'd prefer a timber door with glass panels of some description. Our two current couches are light grey but I'd like to replace them with a blue corner one in the near future. TV unit and bookshelf on the back wall are white. The walls in the room will be Dulux White Exchange Half and the skirting boards/trim will be Dulux Snowy Mountains Quarter. I'm unsure about having a medium-dark grey feature wall (either paint or textured wallpaper) for tv unit and tv to be wall mounted on - this is the wall to the left of the shelving in the image. Floorboards will be a bit lighter and more natural in tone - not as orangey as pictured.