5 ms·
"Diminishing returns" for what? PH is an extremely worthy initiative, but I can't help think it's ripe for a bit of disruption. The whole certification process
by dangravell 11y ago
"Diminishing returns" for what?
PH is an extremely worthy initiative, but I can't help think it's ripe for a bit of disruption. The whole certification process adds needless cost to a build/retrofit and doesn't help with the perception of high performance homes being expensive.
There's no real reason PH has to be more expensive than anything else. Just that volume housebuilders won't be able to pay minimum wages to people they find on the street any more...
- andrewksu 11y agoR-Values. Exponential going the wrong direction. After R-15 or so you slip into the long tail. Good article here- http://www.energyvanguard.com/blog-building-science-HERS-BPI/bid/76941/The-Diminishing-Returns-of-Adding-More-Insulation http://www.energyvanguard.com/blog-building-science-HERS-BPI... PH is performance based, but the religion is a bit excessive on R. I do greatly value the air tightness and the quantitative approach. High R-Value walls are tough to build and get expensive quick. Double wall, exterior sheathing, more parts, more fasteners, etc. We use SIPS walls/roof that have very good R, very little thermal bridging and outstanding air tightness while being fast to build.