If the roof tiles are in good condition and you don't get leaks anywhere, then no need to replace something that is working well. If you are wanting to change the colour, the roof can be sprayed. A light colour would not be as hot as the current black. I think it would also lend itself to the coastal, Hampton's look you want to create. Your entry is lovely and welcoming. In saying you want to clad the exterior, do you mean with weatherboards like a Hampton's style? Vinyl or timber boards?

Hi Lindel Love the design and view! There are a couple of solutions here, depending on what the requirements are (ie cost versus energy efficiency). To your original query, the Colorbond will give a better maintenance long term but obviously the energy efficiency is zilch. The structure behind needs to do the insulation work as well as be structural. From a cost point of view timber framing is cheaper but the wall insulation is limited. You can however use a structural insulated panel to be both the structure as well as the insulation for everything from the upper floor to the walls and roof.... We are doing an extension in this at present which will actually look like a 1930's character style to match the existing home. I'm not familiar with your BAL but we have found that when we get such high insulation ratings from the walls and roof it has usually enabled us to cover the losses from windows and given the ability to have larger windows without the need for double glazing. Regarding the timber, I would be considering an artificial product unless you want to do the maintenance. Cheers

considering Weathertex comprises of 97% hardwood it arguably complies with the covenant as technically it's achieving greater than 3/4 of "timber materials".... that's the angle I'd take anyway ;) PD

Hi Julia, both brands will have products that comply with the non-combustible performance required for BAL 12.5. Feedback we have from builders seems to suggest that the Scyon branded product range is more expensive, but take that with a grain of salt. No matter what you choose there will always be something cheaper it seems, but is it as good, does it have the same after market support, etc,? Both Weathertex and Scyon are established quality brands in the Australian market, so appearance and price are probably the main differentiation. Choose the look you like best from both brands and ask for quotes to supply and install both for comparison. If both look good to you, then lowest price wins the day.