Yurts have been in existence for at least 2500 years, according to written history, but probably have been in use much longer than that. Yurts have been growing in popularity over the last decade as an alternative living home for those that don’t want a traditional stick-framed house.
Yurts are versatile and are used nowadays in many nontraditional ways such as;
- Yoga Studio
- Fitness Center
- Portable retail space for gift shops
- Art Studios
- Guest Lodging
- Vacation Home
Another use for a yurt is as a greenhouse. Traditionally yurts are made from a wooden circular frame with a felt cover and take only a few hours to set-up.
These days yurt frames are made from either wood or steel, and both could work for a greenhouse purpose.
One benefit of using a yurt is the 360-degree area that it creates for even light distribution.
When researching your yurt greenhouse, you may want to talk with local nurseries, home improvement stores, and even local companies that build greenhouses to find out which material would be best for your area and needs.
Depending on your area you may have to pull permits before constructing your green house yurt. Different towns, cities, and counties will have varied requirements, so the best way to find out if you need permitting is to check with your local building codes and permit office.
It’s always best to check with them as they can answer all the questions that you may have about building your greenhouse yurt.
There are quite a few products that you can choose from when it comes to the covering of the yurt. Materials used in covering a greenhouse include;
- Polyvinyl Chloride
The material that is covering the yurt is probably the most important part of a greenhouse.
The material will affect the amount of light that comes through for your plants. These different material types will allow a specific amount of light to filter in and also offer different amounts of diffusion.
The material that is covering the yurt is probably the most important part of a greenhouse. Different coverings will work better or worse in different areas.
Fiberglass Reinforced Plastic, or FRP, is used as an excellent covering for greenhouses. FRP works by scattering the sunlight which then gives a good diffusion and light. The shelf life for an FRP covering is about 10 years because UV rays break down fiberglass which then makes the greenhouse covering brittle.
The best way to get longer use out of an FRP covering is to apply a new coat of UV coating about every 2-3 years. FRP has an R-value of 0.89 and is slightly better than glass.
Glass structured greenhouses are undoubtedly the best-looking choice for a covering but are also the most expensive and lack energy efficiency. When you think about the structure of a yurt (a 360-degree building) the cost would add up quite quickly with all of the special cuts some of the panes of glass would require.
Single pane glass has an R-value of 0.9, while double pane glass has an R-value of 1.5 to 2.0.
A poly-carbonate greenhouse covering is made from a thick plastic which is a cost-effective way to go while also being much more versatile than glass, especially applicable for a yurt greenhouse. The material comes in two different varieties, single-wall or twin-wall sheets.
A single-wall of poly-carbonate has an R-value of 0.83, while twin-wall poly-carbonate's R-value is 1.42.
Polyethylene is a very inexpensive material and very lightweight as well which makes it easy to use. Polyethylene comes as a film and is usually made up of one or two layers.
Polyethylene is porous which is an added benefit as it allows oxygen and carbon dioxide to pass through the film. This allows your plants to breathe in a sealed greenhouse.
Polyethylene has an R-value of 0.87 to 1.7.
Polyvinyl Chloride (PVC Fabric)
Polyvinyl Chloride (or PVC) fabric is a great choice if you are wanting a more durable material.
Some PVC fabrics are heavy and thick and can withstand heavy snow loads while at the same time increasing the insulation.
Because of those factors PVC fabric is an excellent choice for those in a colder climate.
PVC fabrics are translucent and have a UV-treatment engineered with UV stabilizers. This allows for a light diffusion for the plants. The UV-treatment also has the added benefit of being able to prevent yellowing of the fabric, and can also be made flame retardant, if necessary.
The R-value of PVC fabric will vary depending on thickness and the types of treatments that have been added to it.
Cooling and Ventilation for your Yurt Greenhouse
The next thing to take into consideration when building your yurt greenhouse is how to keep it cool so that there is not a chance for the plants to overheat. Cooling and ventilation are done by either mechanical ventilation, natural ventilation, and/or shading.
Mechanical ventilation is done by using a louvered inlet opening, exhaust fans and electricity to operate the equipment.
These would be installed in between the rafters of the yurt, per your design specifications.
Natural ventilation works by taking in two accounts of physical phenomena.
Thermal buoyancy is the first of the two and states that warm air is less dense and therefore rises.
The second is what is called the wind effect, which is when the wind blowing outside a greenhouse creates small pressure differences between the windward and leeward side, which then causes air to move toward the leeward side.
All that it really takes to achieve natural ventilation is to have strategically located inlet and outlet openings.
For the opening you would then add vent window motor and the electricity to run the motors. You can get vent window positions that you charge manually, which takes away the need for motors and electricity. It does, however, have a trade-off, which is that you would need to make frequent adjustments.