this post was submitted on 03 Jul 2023
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When we built, we went with a smaller local contractor. We came from a cold, damp, house, so specified we wanted it WARM. Something that helped is we have polystyrene backed cladding. This isn't included in the R-value calcs for Code, but definitely helps. We also went with thermally broken frames, which wasn't worth the money I don't think.
So I went searching to see what might be different overseas. I picked Canada, and found a page saying Canadian's use about 60% of their total energy use heating their home. So I thought maybe they are just more willing to crank the heater up
But then I came across this page. It lists typical R-value for insulation. The numbers are in the 30-60 range... that's got to be a difference in how they measure, right? I don't think you can buy insulation more than an R value of about 4 in NZ...
Correct, US vs European (and NZ in our case) R values are different. Comparison: https://www.myonlinediary.com/index.php/Insulation/US-EuropeanRValueConvertionTables