A friend of mind recently asked what green features we’d incorporated into the house, and I thought that would make a good post here.

While we elected early on not to pursue LEED certification for our house (which I’m very glad of…it would have taken a lot longer and been more of a hassle than it was worth), we did try to do things in a way that is sustainable.

One of the first things had to do with the slab that was already on the property when we bought it. It was not the size or layout that fit the kind of house we wanted to build, but we hated the thought of jackhammering it up and hauling all the concrete to the landfill. Our solution, ultimately, was to use the existing slab and to build two separate structures. In the long run, I’m glad we did this as we now have a lovely separate office and guest house.

Of course, the most obvious is that we are living off the grid. All of our power comes from solar with the exception of propane which is used to run the stove, hot water heater, the dryer, and the fireplace. Our hot water heater is one of the instant kinds which only heats water when you need it, rather than keeping water hot all the time. I mostly dry clothes on a line outside, so the dryer isn’t used much. We use the fireplace occasionally, but more for ambiance than for heat. (Also, it is code that you have to have a heat source.)

A consequence of running on solar is that we are careful about the power consumption of our appliances and lights. We always check this when we buy new like fans or other electronics. We have mostly CFL and LED light bulbs. (No halogens!) I am looking forward to having a bigger kitchen that will let me cook more on electric (e.g. a crock pot, microwave, toaster oven) and less on propane. On the rare occasion when we multiple days with no sun, we watch our electric consumption more carefully. (We do have a propane generator, but we don’t need to use it much, because our solar setup is quite robust.)

The biggest “green” feature of our house by far is the insulation. In both houses, we have thick super-insulated walls. (In Virga, we insulated with Icynene, a spray-in insulation made from caster beans.) This keeps the house relatively warm during winter and relatively cool in the summer, even when temperatures reach extremes of below zero or over 110, as they sometimes do. Before we lived here, I really had no idea how much difference insulation could make. Now, I think it may be more of a solution to our fossil fuel dependence than even renewable energy.

We have a bright white roof, which deflects a fair amount of sunlight, keeping the house cooler. (Strangely, we actually got a small energy tax credit for this on the first house.) We also have good double-paned windows that I love.

We do some other things to moderate the temperature. (We have no air conditioning despite living in the desert.) In the summer, we pull down shades on the western-facing windows. During the heat of the days, we keep the windows closed, and in the evenings, when it cools down, which it almost always does, we open then. We also have several ceiling fans.

In the new house, we have a couple big adobe walls, which were designed to provide passive solar and keep the house warm at night. It’s hard to judge yet how effective that will be.

One thing I’d hoped to be “green” about was our choice of building materials. We were able to use some materials that are more sustainable and less toxic. Our floors are stained and sealed with soy based products that we really love. We also used environmentally friendly paints from Yolo. These were more expensive, but worth it, we think. When feasible, we used some locally sourced wood for some of the decorative pieces like our doors.

Other materials, like OSB, dry wall, and stucco, were too difficult and/or expensive to find green alternatives for.

Beyond building, I’ve found that now that we live so much closer to the land, we think a lot more about living in a more sustainable way. In this way, it is much like living in Africa. When you have to dispose of your own trash, rather than having it picked up and hauled off for you, you think more about what you put in the trash. When you get your water from your own pump, you think more about what you put in the water supply. Now, we throw out a lot less and recycle a lot more. We are also vigilant about composting, which not only reduces trash, but gives us safe, organic fertilizer.

We grow a lot of our own food, which means not only better food, but also less trips to town. It’s not uncommon for us not to go anywhere in the car for days on end. (On the other hand, having a truck, which obviously consumes more gas than a small car, is a virtual necessity here.)

Once we get the house more complete, we’re going to put in a rainwater harvesting system.

All in all, I’m happy about what we’ve done. We’re lucky to live in a time when all this is pretty feasible, and I think that things will only get better over time.