How to Build a Yurt – Phase 4 – The Foundation
Welcome back everyone!
After preparing the earth and surrounding space (you can see those steps here in Phase 3), it was time to start building the foundation. We need to keep the moisture of the earth from reaching the wooden foundation, so the first step was to roll out some tar shingle paper across the 5 meter circle. This paper lays across the top of all of the bricks that were placed in the previous phase.
Once the shingle paper was laid, the next step was to build the first part of the foundation. Using OSB (or compressed plywood boards), the measurements were made, the boards were cut, and the foundation started to take shape. Most yurts are built just as a circular structure, as is this one, but we decided to add two additional sleeping cabins on either side of the circle as you can see in the video at the bottom of this page.
When the foundation was done, the following step was to build the framing on top of it that would hold the insulation. Basically this step was done by taking 2 by 4 studs of wood and creating a maze of rectangles similar to the framing of a wall before applying sheet rock. After all the boarders were complete, the spaces were filled with Dry Insulation Infill which is used for thermal insulation in cavities (roofs, timber joist floors, and stud walls). This insulation was chosen and used between the boards as it does absorb moisture, as it is essentially blown up pieces of sand. Another option would be to use foam gas as it does not absorb moisture and the gaps of wood in between would not be needed.
With the bottom layer of the foundation of the yurt complete, and filled with the insulation, it was now time to build the actual floor of the yurt. For this project, it was decided that bamboo would be the best choice as it is strong and relatively inexpensive. Remember that a yurt is a movable structure, and keeping the materials light make moving it much easier should you decide to do that in the future, so if you plan to move it, using cork instead of bamboo for the floor might be a better choice.
The bamboo flooring came pre-cut into 97cm pieces that have groves cut into the ends of them. The pieces are fit together like a puzzle with simple wood glue placed in the groves before they are locked together. Once the floor has been put down, the excess edges are cut to fit the circle shape of the yurt. The final step for the floor was to lightly coat in a circular pattern with a Bio oil/wax mixture that is painted on to protect the wood.
And whala! The floor is completed!
Next step- phase 5 – the walls and ceiling …