Vaults are finished! The last vaults were finished in the afternoon, all formwork was removed and tomorrow we can start on the dome.
The outer walls are reinforced with a connection to the ring beam, to minimize movements between wall and vault in the future:
In the morning a team from
ISOCELL arrived to do the blown in cellulose insulation in the walls. After blowing in the cellulose, some control openings were drilled. The weight of cellulose was cut out with a calibrated cylinder and weighted. Depending on the weight you get the precise density of the material.
The plan was to start the dome today, but we had to make some equalizing layer in the corners of the ring beam. Because the ring beam is octagonal and with slightly slanted top, and the dome round, the straw bales would need to have different heights. The mud plaster with a little bit of cement (to make it absorb the moisture quickly because we need it dry tomorrow) helps equalizing the height of the ring beam in the corners. If we would not have done this, the weight of the dome would have ended up in the middle of the ring beam.
We also tightened the holes in the air tightness layer by pulling a small bit of tape over the sticks sticking out of the ring beam. A simple and cheap method:
A lot of hard work was done on the outside of the dome, the foam glass was capped of with a layer of mud (again with cement for reasons of speeding up drying) so that we can put a bituminous asphalt paper on the outside tomorrow - to protect against moisture from the earth before we do the last straw bale infill walls between the vaults:
Our cooks with their home made bread!
Looking forward starting the dome tomorrow!
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