Browse Forums Building A New House Re: How to qualify for 6-star energy rating (pre NCC 2022) 5Apr 22, 2024 6:45 am Doh!!, your right, Permit approval. Sorry about that. Im not familiar with Vic but speaking of 7 star thermal comfort wise you could do the following: Insofar as 6 vs 7 star and the steps to take to acheive this I suggest the following (without reviewing your plans): - All internal & externall wall insulation to be R2.7 (highest they can go apparently) Yes, heighest available in a 90mm wall, Increase insulation where ever you have it. R2.7 is great, beaware that R2.7 is 90mm thick. If not installed to code (and you can near on guarantee it wont be because know one does) it may impreach on your external wall wrap. - Colorbond roof has Anticon 1.3 - How about R1.4 or 1.8? - Upgraded ceiling & between floor insulation (double storey house) - You could go R4.1 if you have the space here or higher in ceilings, just need to manage you joist centers to allow for additional weight - Planning to get biggest solar panels that I'm allowed to - no impact (thermal comfort wise) but great idea - Want the garage to be ready for EV charging - no impact (thermal comfort wise) but great idea - Planning to go for a heatpump electric hot water system - no impact (thermal comfort wise) but great idea Double glaze all windows I not too late, raise or lower window sills to allow/ block direct sun Reduce/ increase window sizes Change sashes to awning over sliding Use thermally broken, PVC or timber window frames Sun shading devices to windows Ceiling fans Reduce the number of ceiling penetrations that require insulation to be removed Ventilate cavities (check this is relevant for your climate zone) Im sure theres more but that all I can think of for now. NCC2022 comes with a raft of changes, the most important being condesation management. Keep on top of this given youre region. Re: How to qualify for 6-star energy rating (pre NCC 2022) 6Apr 23, 2024 8:33 am So I have a bone to pick with the star ratings. I built a 7.2 star home about 10 years ago. It is no where near as comfortable to live in as the 6 star i built a year and a half ago. Straight of the bat, the cost to cool and heat the home was more expensive back then than my current larger house with higher electricity prices. Go figure. Do the smart stuff like insulation etc, but temper your expectations between the differences Re: How to qualify for 6-star energy rating (pre NCC 2022) 8Apr 23, 2024 10:58 am Bimbob maybe it was rated at 7.2 but not built at 7.2? Doubtful. Everything that was listed in the report was installed as per plans and independently verified multiple times throughout the build. While i appreciate there's some science behind the calculations that inform the ratings, I don't think the outcomes apply as consistently as one would think. Re: How to qualify for 6-star energy rating (pre NCC 2022) 9Apr 23, 2024 11:06 am ponzutwo So I have a bone to pick with the star ratings. I built a 7.2 star home about 10 years ago. It is no where near as comfortable to live in as the 6 star i built a year and a half ago. Straight of the bat, the cost to cool and heat the home was more expensive back then than my current larger house with higher electricity prices. Go figure. Do the smart stuff like insulation etc, but temper your expectations between the differences 10 years ago was a different software than we use now. it has had a lot of changes over the past years. Improvments to the software and changes to how Nathers models need to be conducted have made it more stringant. If you modeled your old 7.2 star house now it would probably go down to around 6.5 stars ish. also the energy rating assumes the build reaches a minimum air-changes, but if the builder does not reach this level of sealing then the actual energy usage will be significantly higher. Linked in article "Read Between the stars" by Brian Haines thanks guys! yes this is how I've exactly raised it with the builder. still awaiting response. 12 6358 Whats in the gap between the fence and the concrete? I assume dirt/plants etc, right? like youve shown in other parts of the pics. Im not sure how familiar you are with… 8 6219 I engaged my builder in December last year and we’ve been working on preliminary drawings for last couple of months. I got a call from the salesperson this morning… 0 1857 |