Browse Forums Building A New House Re: Energy report...need darker roof? 10Sep 29, 2021 5:14 pm BlazedSpaniel JS87 Hi all, We're currently in the back and forth between the builder and draftsman and the energy report has come back with a 6.2 star rating. The minimum required is 6. The confusing thing for me is that they require a dark colorbond roof to achieve this rating and we'd prefer a light coloured roof. First off I would've thought the light colour would help with energy efficiency. Now I'm sure there's other ways we can bump the rating up which were waiting to hear back about, however I don't get how we didn't easily achieve the rating in the first place. We've spec'd double glazing throughout, anticon roof blanket, r2.5 walls, and r6 ceilings. How do volume builders which don't even supply double glazing as standard get anywhere close to meeting the 6 star energy rating? Is there something I'm missing here? Which state are you in? A warm climate should have a lighter colored roof - if you're in a cold climate then maybe a darker roof might be more energy efficient but I don't honestly know. The bulk of energy efficiency gains will come from design and orientation; reducing total area of glazing etc. Apart from what you've already mentioned, window frames are very important (including the colour) and also sealing on doors and windows. The actual installation quality of the insulation will be very important in what you actually experience - dodgier builders won't go to the effort of making sure that the insulation fills the corners etc. With regards to your second last question, I believe there's all kinds of loopholes available to achieve the energy efficiency rating. They've already called out that the raft slab has played a significant role in reducing the energy efficiency rating. Dark matter scientist, can breathe underwater, mind reader and can freeze matter just by willing it. Trust me, its in my sig. go upvc window frames ensure insulation under colorbond. not just sarking, lighter color roof also not sure if you have seen this viewtopic.php?t=5823 last couple of pages… 4 110213 2 9385 This certainly doesn't look good. I would be engaging with an independent inspector to have a look at this. As for the unscheduled site visits, most builders are quite… 1 28157 |