Building Science-Three Way Buildings Leak Air

I have talked many times about blower door testing, air sealing and air leaks in this blog, on the Green Building Advisor’s website, and more recently, in the pages of Fine Homebuilding Magazine.  Most of what I’ve written deals with testing a home or techniques used in air sealing a home.  This time I’m going to discuss the mechanisms that cause air to leak, there are only three of them, but first a little science. Continue reading “Building Science-Three Way Buildings Leak Air”

Energy Audit-Calculating the Cost of a Home’s Air Leaks

Air leaking into a home (infiltration) or out of a home (exfiltration) happens naturally in every home, new or old.  No matter how much air sealing is performed, we just can’t make them completely air tight.  I’ve tested some new homes that were very tight, .33 ACH50, (anything under 1 ACH50 is very good) and I’ve also tested many older ones that aren’t so tight, we can use my 1952 Cape as an example, 9.71 ACH50.  In this post, I’m going to discuss how to manually calculate the cost of the air leakage and examine what we can do with that number. Continue reading “Energy Audit-Calculating the Cost of a Home’s Air Leaks”

Construction Design-Randy’s Dream Design

Guess what?  I just won the lottery!  (Not really, but for the purpose of this blog, let’s pretend.)  I’m looking to build myself a new home.  I have choices.  I could build a McMansion with plenty of space I don’t need and will never use.  I could concentrate only on the interior finishes and how the house looks.  If you’ve ever read my blog, you already know what direction I’ll take.  The house won’t be big, a couple thousand square feet is plenty for me, maybe a rambler with a second story over part of it built on a slab, no basement or crawlspace.  Being a BS* guy, I would make an invest in the stuff that is hidden, those pesky control layers I often talk about.  It would be based on the Pretty Good House concept. Continue reading “Construction Design-Randy’s Dream Design”