I personally think the cladding would look nice and be the easiest to maintain. We also live on the Gold Coast and have a brick house that has been rendered (not by us) and, to be honest, it is not particularly low maintenance (if you want it to stay looking good that is). It is prone to leaching which leaves ugly stains so regularly needs retouching with the paintbrush. It can also develop small cracks in the render due to temperature change and movement. However, the most worrying thing for us is with regards to termites. If you render over your brick on the lower half of your house, it is highly unlikely you will see the telltale "mud" they leave that indicates they are trying to gain access into your house (they climb up in between the render and the brickwork). I would be trying to keep the exposed bricks in preference to rendering over them, particularly if you have a garden bed up against the house anywhere.

The charring of wood as a method of preservation is nothing new and was known to European and Mediterranean builders as well as Asians. I have for years charred the bases of deck posts and such as a rot preventative. The practice is mentioned in John Fitchen's classic book Building Construction Before Mechanization. Some of the samples of this shown above are a bit crude. The most beautiful finishes of this type are rather labor intensive as some of the char can be brushed back off to some extent to reveal wood grain. The planter shown below has been coated on the interior with linseed oil, blackjack and turpentine and then set alight with a roofer's torch. The finish is cooked into the wood producing a carbonized insect and decay resistant surface. It gets filled with soil and so the char will be seen only at the edges.

Hi all, Sorry for the slow replies and thanks for the input so far. From what I've read online a re-inforced besser block wall should be about $600 p/sqm including footings in Sydney (Hornsby shire council area). Given the wall is 1m x 10m it should be let's say $7k including design and DA or am I way off? I'd also need to dispose of the current wall + footings but I could probably give the blocks away. The paved area is about 40sqm. Would it be safe to assume $200 p/sqm for concrete base, paver supply (travertine) and install (coping and surrounds)? So the wall and and paving would cost let's say $16k + fencing + cladding. This isn't too bad considering how much better it would look and the value it would add to the house. I like the flexibility the besser would give - render, cladding etc are all options. I'm not sure how bad it is structurally it just has a couple of spots where I can see the blocks have pulled apart over time. Below are some pictures of the bad spots. Also looking at the Amber website it says the maximum courses is maximum non reinforced wall height of 972mm (6 courses). It looks like my wall is actually 7 courses un-reinforced. The wall and pool was built back in 2003. I definitely think planting in front of the wall would help, as would removing the lights but I'm in two minds about whether to bite the bullet and do it properly or just hide it.

The silver will look quite good with your colour scheme. I would probably change some weatherboard for Scyon Axon just to change it up a bit. Also use Scyon Axent for architraves and wall corners. Don't forget eaves and veranda ceilings, etc. as a really nice looking feature use HardieGroove or maybe even some timber to break up the acres of painted surfaces.