Everything there is to know (well, almost) about blower door testing with a few engineer-y jokes along the way.

Furring and foam on the INSIDE for better walls in really cold places.

The @EnergyVanguard investigates an attic insulation job in Charleston, SC. #TheBadNews: from zero to nine inches thick in one roof. #BadDogNoBiscuit.

This Best Practice Handbook covers the roof, walls, and floor assemblies of the building envelope.

One of the biggest air leaks in a house is where the wood meets the concrete

Dew point differs from relative humidity in that it measures exactly how much vapor is present. With relative humidity, it's all relative.

Snap a line, put the panel on the line and nail it, tape the seams, and where to snap that line in the first place.

Five videos about how to install a subfloor over thick insulation without sleepers. The insulation can be over a concrete slab, or not...

Your electrician can make the insulation work better and easier to install

Insulating the shell after blower door and IR camera-assisted air sealing

You can't simply go down to the hardware store and buy a box labeled air barrier

Roof framing, window options, and a mechanical advantage add up to lower bills and a higher quality home

Low-e coatings screen infrared heat from moving through the glass, either inward, outward, or both

Matthias Wandel has a pretty extensive history devising ways to trap mice. The winters are long in Canada, and Matthias seems to have no shortage of mice in his shop.

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

Simple upgrades to steps you take anyway can significantly boost the energy performance of a home

Outside insulation is an effective way to keep heat in. The devil is in the details, such as this one

Like an out-of-plumb wall, an insulated and unvented roof can work well—or not.