I think most of us know of this man, one of the founders of The Energy Conservatory and designers of the Minneapolis Blower Door. I recently had the opportunity to chat with Gary. My intent with the interview is a little different from other interviews that have featured Mr. Nelson. I wanted to ask questions from a practitioner working in the field point of view. Continue reading “Building Science-An Interview with Gary Nelson”
Building Science-WUFI
If you’re a nerd like me, chances are you’ve heard of WUFI. WUFI is a German acronym that basically translates to heat and moisture movements through a building assembly. This is called hygrothermal analysis, it predicts wetting and drying of an assembly and lets us know if that assembly is risky. Continue reading “Building Science-WUFI”
Building Science-How to Test a Bath Fan.
Recently I was at a house conducting an energy audit when the homeowner indicated they were experiencing high humidity in the master bathroom. The windows were fogging up and they had some mold growing in one of the ceiling corners. They operate a bath fan regularly but it didn’t seem to remove any moisture. Continue reading “Building Science-How to Test a Bath Fan.”
Building Science-A Visual for Blower Door Testing
I recently tested the Code Minimum House for air tightness at the rough framing stage. We ended up where I was hoping at this first test, .55 ACH50, 140 CFM. Given the volume of the home, the leakage area is equal to approximately 15 square inches. Continue reading “Building Science-A Visual for Blower Door Testing”
Building Science-Custom Shower
Wait…What? Building science and a custom shower? Yep! As some of you may know from my Instagram feed, I can’t stay busy doing energy audit, assessments and building diagnostics or residential energy design in my area. Continue reading “Building Science-Custom Shower”
Building Science-Resources
A few months ago on Instagram, I posted my favorite resources. I spend about an hour every morning looking at several websites and Instagram feeds to see what’s new and hopefully gain knowledge. Continue reading “Building Science-Resources”
Building Science-Stack Effect
I’ve talked about the stack effect several times on this blog, but have never written a post dedicated to the subject. Stack effect is present in every home. Older, less air sealed homes (like mine) will usually have a more air exchanges due to stack effect. Continue reading “Building Science-Stack Effect”
Building Science-Ghosting
Indoor air quality can effect a lot of things, of course the biggest is people’s health. How do you know if you have poor indoor air quality? One possible indicator is a phenomenon known as ghosting. Continue reading “Building Science-Ghosting”
Construction Design-Fixing Ice Dams from the Interior, Part 1
Today, I’m starting a 2 part series on how I plan on fixing the ice damming on the roof of my 1952 Cape. This first part is going to show photos of my neighborhood, which has many houses suffering from the same condition as mine. Continue reading “Construction Design-Fixing Ice Dams from the Interior, Part 1”
Building Science-What does an air leak look like?
The past few weeks I’ve been discussing air leaks and the need for fresh air in our homes. (It’s best if your fresh air doesn’t come from uncontrolled air leaks.) This week we will see what an air leak looks like and what can be an outcome of these leaks. Continue reading “Building Science-What does an air leak look like?”