Signs of a Bad Duct Installation
Last month while I was in Austin, homebuilder extraordinaire Matt Risinger gave me a tour of some of his projects. Afterward I wrote about something I saw on his new home construction site that was a sign of a good…
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Ventilating High-Rise Multifamily Buildings — A First Look
Condominiums and apartments present some serious challenges when it comes to providing ventilation for good indoor air quality. (I live in a condo that was built in 1970 with no whole-house mechanical ventilation, but that's another story.) In high-rise buildings,…
In Praise of Those Who Do the Dirty Work
Drywall installers, plumbers, HVAC technicians. All those folks and more do a lot of the dirty work in the construction, maintenance, and renovation of buildings. It's often not fun. I've done it myself, so I know. As a teenager, I…
Building Science Word of the Day: Interstitial
The word "interstitial" comes up occasionally in building science discussions. I think I've heard it a couple of times at conferences just in the past month. That may be because Joe Lstiburek was there. He's the guy who used that…
How to Fix a Leaky, Underinsulated Exterior Wall
When I began remodeling my master bathroom last month, I found the exterior wall ripe for some serious improvement. It had a number of problems, and I was excited to find them. It was worse than I imagined in some…
7 Reasons to Gut Your Bathroom When You Remodel
If your home is old enough for a bathroom renovation, you may want to go ahead and completely gut it. I started my bathroom remodel last month with a complete demolition. If I hadn't, a number of problems would have…
The Timeless Nature of Building Science Principles
Can an article on building science be out of date just because it's from 2010? Well, sure. If it's a news article about a program or code or standard that has since changed. But the principles of building science aren't…
An Air Barrier Is NOT a Product
Professor John Straube is one of the smartest guys in building science. On top of that, I think he's the best presenter in the field. At the Air Barrier Association conference in Baltimore, he gave one of the best building…
Design Flaws That Can Rot Your House
Most of the moisture management problems I've written about here are ones that occur because of poor installation. When builders don't integrate window flashing with the drainage plane, for example, water can find its way in and rot out the…
4 Types of R-Value
We talk about R-value all the time. "I've got an R-19 wall," or "Code requires R-38 in my ceiling." But what are those numbers? As it turns out, when we talk about R-value we usually give the R-value of the…