If you want to build a superinsulated, airtight house, you run into some difficulties. How do you deal with the extra thickness of your walls and ceilings when you add all that extra insulation? What's the best way to ensure…
Everyone knows about the impact of burning fossil fuels on global warming. Maybe not everyone believes it, but scientists first started focusing attention on increasing carbon dioxide levels way back in 1827. The impact of insulation on global warming, however,…
At the North American Passive House Conference in Philadelphia in September, I gave a presentation on the global warming impact of insulation, an issue I've been discussing off and on since Alex Wilson wrote his paper on the topic back…
There's big news this week. No, I'm not talking about the delayed opening of ski resorts out West because of the lack of snow. And, believe it or not, it has nothing at all to do with Donald Trump. I'm…
It's that time of year when heating systems start coming out of their summer hibernation. (Except maybe in Vermont. Michael Blasnik's Nest data showed that Vermonters are about the last to start heating their homes in Fall.) Then everyone starts…
Supply and demand are two different things. When you think of an energy code, say the International Energy Conservation Code (IECC), you probably think of demand, not supply. Conserving energy, after all, means reducing demand. It's related to supply only…
You can go into just about any introductory physics classroom and you'll see that the students learn the same stuff no matter which school they attend. They study forces and motion, momentum and energy, electrostatics, and a host of other…
Lying in bed. Feel like I've run a world record mile. Can't...catch...my...breath. I take the deepest breath I can. The noisy air provides little sustenance for my oxygen-starved lungs. Heeuunnnnnnnnhhhhhh... What brought it on this time? Was it a feather…
My website host (Hubspot) had a problem when I published my last article, High Humidity in a Spray Foam Attic, Part 2. If you wanted to comment and were not allowed, that problem has been fixed. I apologize for the…
Three weeks ago, I wrote about an attic with spray foam insulation and the interesting humidity pattern we observed in it. We placed data loggers near the ridge and floor of the attic as well as in the living space…