Yurt Drawbacks and Advantages

So you have looked at modern yurts, and are convinced that you would love to live in such a structure.  The salesman tells you all of the great things about the yurt (there are many), and you are more enthused than ever.  The price tag is presented, and you learn that yurts cost anywhere from one tenth to one fifth of a similarly sized bungalow. You are told that a yurt can be assembled within a couple of days.  So, knowing that you will be mortgage-free the instant that the home is erected, and you will be living in this space-age creation (that was first constructed several thousand years ago in the Slavic and Mongolian regions), you jump at the chance to go minimal with this unique idea.  But, there’s a lot more to be considered before you buy!

While yurts do hold great appeal, and while yurt living has a lot of advantages, there are myriad drawbacks, impediments and disadvantages to consider, as well as significant design and sizing options, depending on your region and geography.

Before we look at design considerations, reflect on a few of the more obscure issues that become very significant once you have moved in.  In our locale, for instance, we commune with nature in a very intimate way, with black bear, deer, raccoons & skunks, wolves & coyotes, weasel, mice, squirrels, an army of insects, garter snakes, birds and so on.  This interaction with nature is, for the most part, enjoyable. 

However, when the bear gets up close and personal, you don’t want to be cooking inside a flexible wall yurt, with plastic windows.  A solid wall yurt, raised off the ground is a must. 

When the skunks, weasels and squirrels take up residence under the building, there goes the neighbourhood.  Consequently, an effective mesh screen and lattice barrier is vital to keep the predators and vermin away.  Sure, the weasel will eradicate the mice, but that leaves the problem of a noxious weasel!  Skunks are fairly easily relocated, since they do not care to be in close proximity to us.  It is reciprocal.  Squirrels offer greater resistance and, like raccoons, can wreak havoc on the tarpaulins.  Our yurt integrates so well into its surroundings that a raccoon family has torn holes in the roof tarpaulin, merely by climbing onto it.  Squirrels leave only pin-sized holes, but more of them.

Birds are much more difficult to deal with. Their use of the yurt roof tarpaulin for target practice is a mere annoyance, but their clamouring across that same roof scratches the fabric as much as any squirrel.

Wolves are a great experience, while coyotes, after you have been away from the yurt for a week or so, do not hesitate to move in, burrowing little caves under shelters.

Insects, like mice, pose a major problem.  No yurt should have carpeting inside, because of the risk of ant, tick and spider infestations.  As tightly as you seal the walls and flooring, insects find entrances.  With flexible wall yurts, mice are a major issue.  This problem is eliminated with well-built solid wall designs.

Overall, though, the advantage of being in close contact with nature in your yurt outweighs the problems that such contact poses, if you prepare for these intruders and guests.  Because of the tent-like assembly, you are intimate with the outside world, hearing almost every sound.  As well, by using design and colour options (camouflage, etc.) for your tarps, the yurt may blend discretely into its environment.

The basic yurt design lends itself to several drawbacks. 

Flexible wall yurts, for instance, have walls that are less than two inches thick.  Even with the space-age bubble and foil insulation employed, you will experience more rapid heating and cooling variations inside this building.  However, a solid wall yurt can be constructed of conventional studding, and insulated to higher levels using fibreglass matt insulation as well as bubble & foil or Styrofoam foil combinations.  On the other hand, a yurt, because of its circular design and open concept, heats and cools much more effectively than a similarly sized bungalow.  For example, our 600 square-foot yurt can be heated during minus 25 temperatures with a small radiant propane heater (4-6,000 BTUs), and a 20 pound tank will last nearly a week.  A 600 square foot house would require triple that amount of fuel and still have cold and hot zones.

It is impossible to use standard glass windows in a flexible wall yurt.  Consequently, the norm is to install single-sheet heavy plastic windows, which transmit a great deal of the heat or cooling between interior and exterior.  A solid wall yurt, on the other hand, can accommodate standard window units (smaller sizes).  Doors pose similar issues, and, more so, because most yurt vertical walls are 6’6” to 7’ – less than standard door frame height.

Other infrastructure poses challenges, too. All wiring must be routed through conduit, as it is installed on the outside of the walls framing, rather than through it.  An option is to use low voltage wiring and inverters throughout the building.  Plumbing, too, is installed in plain view.  Of course, this method of installation is much easier and quicker. 

Due to the open design of these homes, privacy is impacted, and closet space is at a premium.  Creative layouts can offset these concerns.

Other considerations include safe heating systems.  Open flame is very risky in fabric yurts.  With solid wall designs, flame retarding materials and fire-rated wall boards can be installed.  Yurts may be purchased with mounting for chimney egress, but pay close attention to sparks that may burn through the roof tarpaulin!

Other problems that may arise include condensation issues in cold weather, when warm, moist air rises and contacts the thinly insulated ceiling materials, condensing and falling inside the building.  If tarpaulins (particularly roof tarpaulins) are not skin-tight, wind causes the tarp to billow which, in turn, packs down any matt insulation used and reduces that R-value. While the wind effect against a yurt is minimized because of the round design, this means that there are no leeward sides or areas next to the yurt, where you can huddle against the cool breeze.  That also allows smoke and loose sparks to migrate around the building during the winter.

Yurts, almost always, do not meet zoning demands of any urban jurisdiction, and, therefore, do not qualify for permits.  If you are building in remote locations, this will not be an issue, and some solid-wall designs, indeed, can obtain engineer certification.  Proper design and construction practices should be employed regardless of whether the building meets code.

Most of us choose yurts as our living option because of its simplicity and eco-friendliness.  Simplicity equates to Spartan, and Spartan means less luxury.  The yurt is simple.  That, in turn, should eliminate the expectation of opulence.  If you want opulence, stay in the city!  The yurt offers a wonderful escape and alternative to conventional housing, but be prepared for the drawbacks, as well as the advantages.

Yurt Popular, Even With Flies

Flies: not the most attractive topic. But flies are an everyday part of our summer lives, and, in our yurt, we have discovered that flies can be particularly bothersome. The design of a yurt lends itself well to being a haven for these pests. The relatively loose fit of the tarpaulins allows these nuisances to squeeze themselves through crevices and cracks, while the permeability of the structure enables odours to waft outward. Combine these two factors with the tendency of the roof tarpaulin to trap the sun’s heat, and yurts become playgrounds for flying pests.
Last autumn, for example, I removed a portion of the dome insulation to install additional snow load braces, and found hundreds of dormant flies embedded in the top side of the fibreglass insulation layer. While part of the problem may have been that the eggs pre-existed in the insulation package, recent hot days have stimulated an invasion of black and bluebottle flies.
An additional contributor to the attraction of our yurt for flying insects is the presence of our grey water tanks and compost holding tank near the home. Whenever we drain or flush these systems, flies are drawn to the site.
The round design of the yurt, as well, means that there is less air turbulence, on windy or calm and hot days. This relative tranquility allows flies to gather and reproduce.
We have implemented and tested a variety of solutions. The conventional insect trap is a general failure, for flies, mosquitoes and wasps. Unfortunately, it does a terrific job on moths, which we prefer to allow to thrive.
In desperation, we resorted to commercial chemical sprays, without success, while also flooding the environment with toxins. These sprays included perimeter, spot and space sprays, all equally ineffective.
We grow such plants as tansy, lemon balm, sorrel and other natural insect repellents. They do work, but only within a very limited and defined area. We would need to plant these sentinels every few inches around the home, and even vertically on our yurt walls to have any hope of winning the insect war.
Inside the yurt, we have resealed all of the joints of the foil-backed bubble insulation that lines our yurt roof. This action has been significantly successful, as the flies that do hatch in the domed area must migrate outward, rather than inward.
Our walls have been difficult to seal completely, given the way they moor to the roofline and floor. However, taping all of these joints has been successful, as well.
A third successful solution has been to open the dome vent while closing all but two of our windows, and using our ceiling fan to draw the air upward, instead of forcing it downward. We have installed a floor vent that allows cool air from beneath the deck to be drawn upward. This continual air movement keeps the flies from settling. The round interior of the yurt maximizes air movement, which the flies dislike.
The last proven solution that we have employed is to install a small fume hood over our cook unit, and bent it outside. With less odour to attract the flies, they now prefer to congregate near the outside vent.
We are experimenting with one other solution: mustard paste. In past years, I have had great success in deterring bugs and crawling pests in the garden, by obtaining mustard seed and wild mustard screenings from a local seed cleaner. When crushed and applied near plants, insects shy away from this hotfoot compound. We have obtained mustard oil (crushed form these same seeds), and have applied a spray under the lip of the roof tarp where it meets the wall, around the base of the wall tarp and around the window and door cutouts. So far, in the areas where this oil has been applied, there is a huge reduction in fly accumulation. However, we need to observe how long this spray lasts, and whether it has a detrimental effect on the fabric. We will keep you posted!

Yurt Interior Walls

One of the great benefits of the yurt design is the open room concept. The lack of walls means that air moves freely. Combined with the round yurt structure, this means that a greater efficiency in both air movement and its contingent heating efficiency result. However, modesty demands that we build our homes with a private bathroom. Even in a yurt, this means walls, and a barrier to smooth air flow. Similarly, many of us want closets and wardrobes, whether they are built as standalone units or integrated into the bed enclosure. Again, the natural flow in the yurt is interrupted by such barriers.
In our yurt, we built a six by eight foot bathroom, but left the ceiling area open. While the walls do provide impediment to air movement, the open ceiling concept means that warm, moist air is able to move out of the enclosure, and reduce heat and vapour pooling. By combining our closet space into the rear, outer edge of the bathroom, we were able to reduce the number of structural breaks.
Still, these barriers created condensation problems within the yurt. In the late fall, cooler outside air and a lack of air movement in the corner areas where wall met outside wall, a severe moisture problem resulted, with development of mould. We solved that issue by implementing several strategies.
First, we installed small 12 volt fans in these vulnerable portions of the yurt. The fans were salvaged from desktop computers, yet are sufficiently powerful to move the air away from these stagnant areas.
Next, we doubled up on the insulation factor where floor, outside wall and inside wall met, installing a one inch thick segment of polystyrene rigid insulation, extending six inches above and below the floor level.
The third change that we implemented was to install two fans along the top plates of the bathroom and closet, forcing air to move from floor to ceiling.
By moving our furniture and small items away from the outside wall, we increased air flow.
Lastly, we bored two inch holes at the base of the wall, allowing the air to move freely between the main yurt floor space and the bathroom and closet.
It is imperative, if you are choosing to build a yurt for efficiency, that you consider what makes the yurt an efficient design. Vertical air movement, allowing hot air to rise in the summer and vent at the apex of the dome, as well as moving it downward with small fans in the winter, is a significant feature of the yurt design. It is more imperative, though, that you reduce barriers to air flow in dead spaces and “corners” of the yurt. Simple layout alternatives provide this free flow of air. Where possible, consider moving walls a few inches from the outside, and tie them together in a free-standing box system, so that there is a space along the entire height of the exterior yurt wall, keeping air flowing freely. Ensure that insulation is installed properly and evenly, with no cold spots to encourage dead air and condensation.
Built properly, the yurt design is a marvellous system. Done carelessly, and it loses its structural integrity and natural efficiency.