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Building Science

Embarking on the Building Science Learning Curve

Lessons from two people who started down the path of knowledge by building green homes

Image 1 of 4
I went to Sierra Vista, Arizona, last week and visited with David Butler. We shared stories about our building science learning curves, which aren't all that different.
Image Credit: Energy Vanguard
I went to Sierra Vista, Arizona, last week and visited with David Butler. We shared stories about our building science learning curves, which aren't all that different.
Image Credit: Energy Vanguard
The green home in Charlotte that David Butler built and lived in before moving to Arizona. Butler used strips of foam sill sealer to create an air gap behind the exterior rigid foam insulation.
Image Credit: David Butler
Liz Seiberling's Solar Cracker house in Florida. That's me up on the roof swinging a hammer, circa 1996.
Image Credit: Liz Seiberling
The home I built with structural insulated panels. This was the day in December 2001 when the roof and windows got installed.
Image Credit: Energy Vanguard

I just returned from Arizona, where I spoke at this year’s conference of the Structural Insulated Panel Association. Since the conference was in Tucson, I also took the opportunity to visit with my friend David Butler of Optimal Building Systems.

David is an amazing source of knowledge in the field of building science, especially concerning mechanical systems, and our conversation got me to thinking about learning curves. His story is quite interesting and not so different from mine in some ways. Perhaps the advice at the end of this article, based on what David and I went through (independently) over a decade ago, will help you as you travel up your own building science learning curve.

Look for consensus among experts

We were talking at breakfast yesterday morning when he told me about the information-gathering process he went through when he designed his previous home in Charlotte. He didn’t know much about building enclosures at the time. His background was electrical engineering, and his career1 until that point had been focused on developing home automation systems.

As he set about learning what he needed to know to build the house, he found varying opinions, naturally. One way he handled that was to keep digging until he found several knowledgeable people who pretty much agreed on whatever subject he was researching. He figured that when he found consensus among experts, he couldn’t go too far wrong by following their advice.

While working through the details of his stucco wall system, however, he ran into a dilemma where no consensus emerged. That was when lawsuits were killing the synthetic stucco industry due to moisture getting trapped in the wall. David found little agreement among builders and stucco contractors on how to avoid the failures that were making the news.  So he decided to seek out the leading expert on the stucco failures and trust his advice. That person turned out to be Dr. Joseph Lstiburek.2 He ended up hiring Joe to design the wall system as well as the rest of his building enclosure.

He had a similar experience when he went to work for Enalasys, the company that started him down the path of becoming an HVAC expert.  Enalasys was developing diagnostic tools for mechanical contractors. David was hired to help develop an HVAC monitoring system. At that point, the bulk of his knowledge about heating and cooling systems was from a controls perspective. 

During his tenure at Enalasys, David joined ASHRAE and immersed himself in all things HVAC. When he had questions, he wasn’t shy about getting in touch with industry gurus and picking their brains. These two experiences are what led David to become the HVAC expert he is today.

How I found good information when I built a green home

In 2001, I was a new landowner getting ready to build a house. I knew I wanted it to be a green home, and I’d watched (and helped a tiny bit) as my grad school thesis adviser, Liz Seiberling,3 designed and built an off-the-grid green home in Florida. I had a little bit of knowledge already because of that experience. (That’s me on the roof below helping to install the tongue-and-groove roof deck, circa 1996.)

I also was in the Atlanta area and was well aware of the Southface Energy Institute, so that was another great resource at my disposal. In fact, one of the first things I did was to sign up for their four-day homebuilding school. It was there that I decided to go with structural insulated panels (SIPs) as our construction method. I also made contacts there, on both sides of the desk, that helped me during the two-year process of building.

Another thing I did was to start buying copies of Fine Homebuilding magazine off the shelf when I visited Home Depot. When I started looking forward to the new issue appearing on the shelves, I knew it was time to subscribe, so I did. That was a tremendous resource. Not only did it (and still does) have information-packed, in-depth articles from pros, the section with tips also was helpful.

I was on a mission — a learning mission — and I was obsessed. I had to learn about framing, SIPs, greywater systems, composting toilets, permitting, dealing with subcontractors, putting together a cost estimate, windows, foundations, solar-powered wells, and much more.

Of course, where it got real was when I took all that information I got from books, magazines, Southface, and experts and started talking to local trade contractors. I remember putting together the list of specs I wanted for my poured concrete foundation to one contractor, Wendell, and when I went to him a few days later to see if he had a bid for me, he said, “Where’d you get these specs? I can’t meet them.” He didn’t even want to bid on it, and he was the best foundation contractor in the area!

I learned that sometimes I had to settle for less than perfect because I just couldn’t take on every part of the job. Overall, though, I was able to incorporate a lot of the good stuff and do things the right way. Yeah, I made some mistakes, but it was still a great house. In fact, it was the greenest, most comfortable, efficient home I’ve ever lived in. My next one will be even better.

How you can find good green building information

So, what does all this mean for you as you try to build your green home or fix your existing home? To summarize David’s and my experience, and add a bit more:

  • Find sources that you trust.
  • Keep digging.
  • Talk to the local pros.
  • Take advantage of blogs and Internet discussion forums.
  • Think long and hard about doing it yourself.

Those points are mostly related. The better you are at gathering information, figuring out what’s valid, and avoiding information pitfalls, the better you’ll do at building or fixing your home.

Let me now offer two words of caution: First, just because someone holds a strong opinion doesn’t mean they’re right. That’s why it’s important to look for consensus.

Second, know your limits. I’ve heard horror stories about people with no experience trying to build their own home or hiring the wrong people to do something unconventional. It always ends up costing more, not less, when you bite off more than you can chew in this arena. The higher cost of a good pro looks pretty good in hindsight in those cases.

I heard recently about someone who had to go looking for a pro who could salvage something from the huge house he’d started building. A lot of the people he approached told him he just needed to tear it down and start over but he did finally find someone who could help. He’s spending a lot more money to do it right the second time than he would have if he’d started out doing it right. Don’t be that person.


1. I also learned from him that through the mid-nineties, he had a nice business as a syndicated newspaper columnist. Maybe you saw his column, which ran in 50 papers duing the period 1992 to 1997. It was called At Home with Technology and covered all kinds of interesting topics. At the end of each article, he offered more information on the topic if the reader sent him a dollar, which so many people did that he had to hire people to handle opening and replying to the requests.

2. Joe wrote a wonderful article last November about his own building science learning curve. Aided by giants in the field of building science and the engineering ingenuity of his father, he figured out how to do Exterior Insulation and Finish Systems (EIFS) without having moisture problems.

3. Liz was the only woman on the University of Florida physics department faculty when I started there. She called her home the Solar Cracker because it was a Florida cracker-style house powered by photovoltaics. She and her husband, Randy, also bought a sawmill and sawed all the lumber for the home. If you look closely at the photos on the page about her home, you can see me swinging a hammer on the roof as we put the tongue-and-groove roof deck on. Liz and her husband Randy now live in rural Tennessee, where they’ve built another house. You can read about it in her blog, An Edible Forest Garden in Tennessee.

Allison Bailes of Decatur, Georgia, is a speaker, writer, energy consultant, RESNET-certified trainer, and the author of the Energy Vanguard Blog. You can follow him on Twitter at @EnergyVanguard.


  1. dankolbert | | #1

    The first rule of Building Science Club...
    is it's a good way to never sleep again. I lie awake at night obsessing about every job I've ever done and how if I only knew then what I think I know now. And then there are the unknown unknowns...

  2. user-757117 | | #2

    Response to Dan Kolbert
    You're right and Rod Stewart had it wrong all along.
    The lyric should've been:
    "I wish that I knew what I [think I] know now, when I was younger..."

  3. Expert Member
    Dana Dorsett | | #3

    It's definitely a process...
    But some general rules of thumb to live by:

    You can trust people who sell & warranty stuff an order of magnitude more than your brother-in-law (unless your brother-in-law's name is "Joe Lstiburek" :-) )

    You can trust people who BUILD & warranty stuff an order of magnitude more than people who simply sell stuff.

    You can trust people who empirically MEASURE and study stuff (and have no stake in the the financial outcome) TWO orders of magnitude more than people who build or design stuff.

    Which I guess means you can't trust ME, seeing as how I'm a brother-in-law to quite a few, don't sell or warranty anything into the building industry, and only design, build or measure stuff for my own purposes (more or less) though people have been picking my brains a lot despite my sternest warnings. :-)

    Amazingly, amid rampant design and construction errors, most homes aren't falling apart, despite all the missed opportunities to really get it "right" on the first go. The most egregious faults may show symptoms in short years (some easily correctable, some not), but most will take a decade or more before it's a construction-emergency. Fixing what you can and understand during your tenancy at any house is about as much as we can hope for, but for new construction or big rehabs there is a lot more information out there now (some of it enshrined in code) that simply wasn't available 20 years ago.

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