>Aerated concrete is extremely popular in Kazakhstan and Russia in private houses.
In California (FWIW), I expect that you hit seismic issues.
In California (FWIW), I expect that you hit seismic issues.
Old saw about Generals fighting the last war. Energy efficiency standards assume the need to conserve limited supplies for fossil fuels. And the need to not interfere with building large houses for upper middle class people.
Bad thing is R value is a metric designed to upsell insulation. R30 insulation is twice as good as R15, if you're the guy selling it. If you're the guy buying it, not as much.
A heat pump and solar installation needed heat my house in the winter would cost about $12000. But actually the heat pump would only run as I mentioned above for 5 months out of the year. So really just to offset the energy, $6000.
Economically high performance insulation systems lose to solar panels.
That wasn't true 10 years ago. But it's true now. And it'll get worse going forward.
Since insulation is low maintenance, you'll get those savings over the whole lifespan of the house.
Now, if you're in an existing house, it likely doesn't make sense to tear down all your siding and drywall just to add insulation, since you're having to both demo and build.
New construction with boofo insulation isn't going to solve global warming.