Our little house has been tested this winter. Not by snow (we haven't had much of that), but by single-digit temps. It's been the coldest weather since we moved in a couple years ago, and it's supplied us with more than a few lessons learned:

Floor insulation. The cold that seeps into the house comes up from the floor. We thought the few inches of rigid insulation we put between the floor joists was enough, but we probably should have doubled it. It would have been worth the additional $$. We're thinking we might add insulation underneath the trailer.

Skirting the trailer. We would also benefit from skirting around the trailer, to cut down on the wind running under the house and chilling our floors.

Water pipe insulation. A year ago we happily reported that we'd completed enough upgrades to our system to have flowing water all year, which is something you learn to be happy about when you don't have any running water your first winter. We were wrong. Though they didn't burst (yay!), our pipes froze in a couple places, temporarily cutting off our water supply. The hose from our friend's house to our water tanks should have been deeper in the ground, to get below the freeze line. (If it ever bursts, that's just what we'll do when we replace the hose.) The pipe that runs through the floor joist under our insulation needs heat tape and more insulation, so it won't freeze. 

Cut-off valve. Adding a water cut-off inside the house means we can drain the pipe under the floor when we go into a deep freeze. Hopefully, this will keep the pipe from freezing until we get the chance to add heat tape and insulate it better.

Electric loads. We came home to a 36-degree house when the breaker popped while we were away. We had someone visiting and hadn't warned our guest about issues we've been having with the space heater, water heater and pump drawing power on the same line. If they all go on at the same time, they flip the breaker. We need to take a long look at what we have on each line, what we have on solar (we could move the refrigerator to solar, as it turns out) and how to better manage our electrical draw. (This is Bill's domain; if you have questions, let me know and I'll ask him!)

Wood. We're trying to get better about staying ahead on the log supply for the wood stove. When you need it, you need it—and a cold, winter night is not the time to be out in the dark splitting and sawing. We have one, big metal trashcan full of right-sized logs up in the garage now, and four small cans that sit outside the door on the deck, so we can grab more wood without going anywhere.
 
Backup bucket. We finally remembered to buy a spare 5-gallon plastic bucket, so that we don't have to walk up to the compost barrels in the middle of a snow storm or single-digit temps when the bucket in the toilet gets full. We can just snap a lid on the full bucket and leave it outside the door until a convenient time to bring it up the hill to the barrels.

Air exchanger. The past two winters, we've had to open windows (despite the prevailing temps) if the carbon monoxide alarm goes off, signalling the need for fresh air in the house. Now, with our  exchanger, air is efficiently coming in and going out all the time—with the windows sealed tight.

We have hot showers! We have a bathroom door! We have a recessed medicine cabinet! Who knew a year ago that having a fully functioning bathroom would be this exciting? Not me.

So, it's time for a restroom summary:

The bathroom is a little under 6' x 6'. Like the bedroom partition, the bathroom walls don't reach all the way to the ceiling. Though we needed privacy, we wanted the house to feel open and light.

Our shower has an off-the-shelf 27" x 54" pan. We covered the moisture-resistant green board in the shower area with galvanized, corrugated sheet metal attached by roofing screws with waterproof washers. We overlapped the sheets to prevent water from getting behind them and sealed the corners with silicone caulk. Our nice, big shower window lets in a lot of light, but we didn't realize it would get splashed this much when we shower. So we added extra-wide, painted trim around the window, and we wipe the wet sill after we shower. (So far, so good.) Our Delta shower head is a low-flow model, but still produces a good, solid spray. Rather than heating water all day, we flick on our 12-gallon water heater 30 minutes before shower time, and get a good six minutes of hot water. Not a long shower, but long enough! You'll find more on plumbing here.

Our tiny, wall-hung sink is deep enough to make hand washing and tooth brushing convenient without taking up much space in our compact bathroom. After a lengthy search, we found our pint-sized Barclay sink online at Home Depot. We went with a Delta faucet on the sink. 

Our composting toilet may not be as convenient as a traditional flushing model, but we've adapted quickly with no real complaints. Nuts and bolts: The toilet seat is an Ecovita Privy 501 with a urine diverter, which means Number Two stays drier and therefore less smelly while Number One flows down a pipe through the floor to a gas can under the house. The diluted urine can be poured out anywhere and used as an effective fertilizer; we chose to pour it a distance from the house. Two 5-gallon buckets sit inside our DIY cabinet. One we line with BioBags, fully compostable liners that we will eventually be tossing into a yet-to-be-built "humanure" composter. (For now, the poop gets "wasted" by being tossed in the landfill. We need to get on this project!) Each time we make a deposit in the bucket, we scoop up some coco coir from second bucket to cover the poop. (We use coco coir, because it's considered more effective than sawdust and it's more sustainable than peat moss, the other "cover" options.) For more info on composting toilets, you can't do better than the Humanure Handbook. We also found the Gone with the Wynns website handy when figuring out our system.

Our door is a hanging barn-style DIY model scavenged from local demo sites. More here.

Our 9-inch-deep medicine cabinet is set into the utility closet behind the bathroom. A hinged mirror covers it. More here.

Our floor is the same tongue-and-grove pine we installed throughout the house. We used a waterproof stain and have a rug to sop up any shower drips. 

The light is an outdoor fixture by Design House that seemed to fit our bathroom style better than traditional bathroom lighting options. (It was also cheaper!) Like the rest of our lighting, we're using an LED bulb. It should last around 20 years and uses very little power. 

Our towel hooks, towels, soap dispenser, shower curtain, rod, rug and shower shelf are all from IKEA. They don't pay me to say this: IKEA showrooms are a great place to cruise for tiny house ideas and their products fit tiny budgets like ours.

What's not in our bathroom yet: a vent fan. We bought one, and it was so big and so ugly, we returned it. We'd like to figure out an affordable, compact way of bringing fresh air into the house and venting out any bathroom moisture and smells. Still in the works.... 

Please click on the pictures below for more details.

We haven't posted anything about building lately...because, well, we haven't been working outdoors much these sub-freezing days. (And there was that wedding in Mexico to blissfully distract us.) But we've still made progress, spending time reading and calculating and dreaming—and shopping. We've made a boatload of decisions: from lighting and heating to our wall paint and our composting toilet. 

Some of our picks:

The Kimberly Wood Stove. This sleek, stainless "gasifier" wood stove burns efficiently and cleanly, with less than half the emissions allowed by the EPA. It could heat a space six times the size of our tiny house, and one load of wood can burn up to 8 hours. So, as long as it works as advertised, we should be toasty all winter next year. Not to mention, we can do a little cooking atop it and, if we opt to buy a thermoelectric generator, we can produce a little power to boot.

Origo 6000 Oven/Stove. Electric stoves are energy hogs; using one would tax our solar/battery system (still in the planning stage). While some "tiny housers" opt for propane cooking, we're trying to steer clear of fossil fuels associated with fracking. The Origo runs on clean-burning, non-pressurized, denatured alcohol. We were lucky enough to see a couple in use at the Tiny House Conference we attended last April. Our two-burner stove and oven is designed for boats—but it's also a great choice for off-the-grid tiny houses. It may take us an extra minute to boil a pot of water, but we think it will be a well-spent minute.

BioLite Basecamp. No more propane grills for us. This wood-burning grill makes good use of the sticks that fall to the ground all around our tiny house. A built-in thermoelectric generator charges the internal fan that improves combustion and enables a cleaner burn. Plus, it generates enough extra energy to power its built-in light and charge a phone.

Ecovita Privy Kit. We're building our own composting toilet. Not the most glamorous of subjects—but quite essential. The short story is that keeping Number One separate from Number Two makes things easier and neater. This privy kit will work in combo with a plastic gas can, plastic bucket, coco fiber and a wood base we're working on. Enough said...