Oct 8 2019
Can a wall plummet from R-50 to R-12 because of the studs?
Mar 22 2019
Dew point differs from relative humidity in that it measures exactly how much vapor is present. With relative humidity, it's all relative.
Mar 1 2019
Science explains the natural world with a disciplined method of repeatable—and verifiable—questions, experiments, and answers
Nov 14 2018
Stucco is supposed to keep water out, but it is a reservoir cladding, so it also keeps water in. Sort of.
Oct 16 2018
This chart explains how moisture behaves in the air as temperatures rise and fall—rainstorms, flooding, and glaciers in wall cavities are distinct possibilities.
Oct 6 2018
The science of stickiness: a molecular look at tape's adhesive and cohesive properties
Aug 1 2018
Low-e coatings screen infrared heat from moving through the glass, either inward, outward, or both
Jul 5 2018
Too much of a good thing can kill you. Including sunny weather.
May 1 2018
Like an out-of-plumb wall, an insulated and unvented roof can work well—or not.
Apr 20 2018
Extreme heat and humidity can drive moisture deep into framing cavities which can cause mold, rot, and structural damage
Jan 2 2018
Drip edge is another water-shedding tool
Dec 13 2017
Moving air keeps unwanted heat and moisture out of your roof system
Aug 22 2017
You can't simply go down to the hardware store and buy a box labeled air barrier
Aug 8 2017
Old Building Details That Work
Jun 28 2017
Vapor barriers cause a lot more harm than good in many parts of North America. Understanding vapor barriers begins with knowing what it means to be one