Shopping
Andrea — October 30, 2011
The last time Ted and I built a house, it was in an energy-efficient subdivision in downtown Tucson, and all we had to do was pick out finishes and fixtures. It seemed like a big task at the time: we had to go to the plumbing, lighting, kitchen, and tile showrooms and make all sorts of decisions, with the help of the design staff of course. The low point was when I found myself studiously comparing toilet seats late night on the internet. (In case you're wondering, here's what I picked.)
In retrospect it was a piece of cake, like coloring within the lines of a coloring book. Picking out a few fixtures for a house that somebody else had designed and was building? No problem! By contrast, I've been actively planning our current house for two years, and only now am I picking out fixtures. After overseeing a foundation and envelope, e-combing North America and Europe for windows, sourcing commercial-depth roof joists, and frantically ordering expanding foam tape and air-sealing gaskets, the task of picking out faucets and tiles is but a frivolous afterthought.
And yet I wish I'd been frivolous enough to start doing this sooner. If only I'd whiled away the hours last winter bookmarking light fixtures and plugging them into my SketchUp models! Because now I'm frantically scouring the web for ideas, and I'm also running around to plumbing and appliance showrooms trying to get quotes in a hurry so my subcontractors can get to work.
My insane level of attention to detail is both a blessing and a curse. It means I have a good eye for design and user interface, and I think carefully about how everything will come together. But it also means I can't just relax and pick things haphazardly, because living with a bad choice will positively drive me nuts. I haphazardly selected our ceramic floor tiles in Tucson, not noticing until after they were installed in every room of the house that they had a rustic-looking dirt pattern baked right in. A friend helpfully pointed out that you wouldn't be able to tell when the floors were dirty, but I replied that you also couldn't tell when they were clean.
Obviously I can't anticipate everything, and I'll have to be philosophical about whatever bad choices we make, but I know a lot of eyes are on this project and I don't want to let down the team.
The biggest challenge is probably the lighting. So many different fixtures and setups to choose! I see why a lot of builders just give up and litter the ceiling with recessed cans, but we are scrupulously following Martin Holladay's Ten Rules of Lighting and avoiding recessed cans like the plague. As Holladay points out, it's better to illuminate the ceiling than the floor. With a white-painted ceiling, the light will bounce off it nicely in a way that mimics the natural world (bright sky, darker ground). Recessed cans, however, cast weird shadows and call undue attention to the floor (including those pre-dirted ceramic tiles).
His slideshow included a great-looking T5 fluorescent luminaire by Delray Lighting:
T5 tubes are have a much smaller diameter than the old schoolroom fluorescents we're all used to: 5/8" as opposed to 1-1/2". They produce an impressive 100 lumens per watt, which means lots of bang for your electricity buck. And this fixture embraces the stark look of the tube, meaning that all the light is illuminating your house and not the inside of a shade.
We'll probably use a lot of T5 fixtures, but we'd also like to use LEDs where we can afford to. One way to do this, ironically, is to buy Edison-style fixtures and then screw in LED bulbs. Today I boldly (foolishly?) ordered some sale-priced pendants that take a standard candelabra bulb, which I can then turn into LED fixtures by installing LED replacement bulbs. I'll let you know how that works out.
I've put Ted in charge of researching LED strip lighting, which we plan to use liberally. For example, we want a "late-night glass of water" switch in the kitchen that will turn on red lights rather than white ones (to keep the sleepy wanderer's pupils from contracting), but I'm concerned that red lights in the kitchen might convey the wrong message.
We're also choosing appliances, which will likely include a relatively inexpensive top-freezer refrigerator, a mid-tier induction cooktop, and some crazy fancy dishwasher (Ted imprinted on an ASKO from Sweden the other day). Indeed, if anything prevents us from reaching net-zero performance, it will probably be our deep love of automatic dishwashing. They make energy-efficient dishwashers in America, but Ted is quite opinionated about dishwasher rack configurations and so far only likes the ASKO. I'll let him win this round, though, because if Ted doesn't like our dishwasher he might feel less inclined to load it (which he is generally quite good about doing.) I confess to being conniving in this one small way.
That is really just the tip of the shopping iceberg, and writing this post has been a nice break from the endless online browsing.
In other news, we got about 18" of snow last night (yes, in October). The roof installation isn't yet complete, but the unfinished parts are tarped and/or tri-flexed and should therefore be unharmed. Ted and I drove up this morning and saw that the solar awning to the south had already shed most of its snow (yay!) and that the north drip-edge was working nicely. We're hoping the snow will melt quickly and that work can resume without delay.

Random Bits
Few architecture schools teach anything about energy-efficiency, so make sure your architect knows the basics. Get them a copy of Designing the Exterior Wall: An Architectural Guide to the Vertical Envelope by Linda Brock
and make them read it.




home building
Mark Bondurant — November 27, 2011I've spent this Sunday am reading your home building blog and greatly enjoyed it. Your attention to detail and willingness to subject yourself to the experts and the inpenetrable depths of building science and the details it requires is inspiring! My partner and I are building a passive solar, net zero home in the mountains of western N. Carolina near Asheville and we are about at the same stage as you are. I greatly appreciate all the time and attention you are giving the blog and the sharing of the information you collect. I can't imagine building a home (and the steep learning curve that presents to nonprofessionals), doing the research and then sharing it as well.
A brief description of our project: we were able to do slab on grade and use the insulated mass of the concrete slab for thermal storage. (We seeded the slab with broken, colored bottle glass from the recycling center to create a terrazo-style floor. The floor will be polished and dyed several colors once the trades are finished with rough-in and once buffed should be virtually maintenance free. We'll see. We're wrapping the entire envelope--from slab bottom, up the walls and over the roof with 2" XPS foam. (False rafter tails added over the foam in order not to have a break in foam.) This is taped and serves as both continuous air barrier and keeps the framing of the house warm. Cavity insulation will probably be a combination of densepack cellulose for vertical areas and spray foam for horizontal. Roof is standing seam galvalume. Windows will probably be VEKA, u-.12. The south windows with passive solar glass are rated at shgc .52 and u-.18. This is based on the window rep's conversations with the supplier and I'm still trying to get the European equivalents for u value and shgc. The price, even with shipping, is supposed to come in at what a Marvin Integrity would cost. I'll know in a week or less. We'll be able to do a horizontal loop geothermal system, fairly unusual in the mountains. Not sure about ventilation yet, but want to explore the Venmar Eko ERV as suggested by our energy rater. If you have any time left for photos, let me know and I'll send a few out to you. Warmly, Mark Bondurant
Re: home building
Andrea — November 27, 2011Hi Mark,
Thanks for writing! Your project sounds terrific, and from your website I can see that you have the experience to pull it off smoothly and close to budget. It sounds like you picked a great site, flat enough for a slab on grade and a horizontal GSHP, yet still amid mountains. As a kid I went to summer camp in Hendersonville, NC, so I know how beautiful it is around there.
Your floor sounds intriguing! I've seen a lot of polished concrete floors (they were popular in Arizona) but never with broken-glass terrazzo. As for ventilation, I've heard very good things about the Venmar EKO and am still considering it myself. The only thing that's stopping me is that it's not Passivhaus-certified, which means we don't get to count the full efficiency percentage in PHPP — a non-issue in your case.
Blogging about our project is harder than I expected, for many of the same reasons that building a custom home is so difficult. Our costs have soared far far beyond my initial naive projections, and it's all taken way longer than I thought it would. Most owner-builders don't publicly chronicle their overruns and errors, but Ted and I feel there's value in sharing our mistakes as well as our achievements. This is good in theory but it's quite hard on my ego, which adds insult to the financial injury.
Hmm, my reply to your comment seems to be turning into a blog post. I'd better use this momentum and start writing one!
Best wishes,
Andrea