I conducted experiments on the postal tubes to try and protect them from being weakened by rain and moisture. I coated the tubes with melted beeswax blocks and boiled linseed oil to different consistencies.
I exposed four tubes to the elements for three weeks. Each postal tube was successful in protecting the cardboard from being weakened from rain and moisture.
I also experimented with roof seal to try and protect the cardboard from the elements. The roof seal failed to protect the cardboard.
I experimented with a natural resin as well. However, the resin failed to protect the cardboard.
Melted beeswax and linseed oil coated postal tube with sheep wool insulation stuffed inside.
The beeswax and linseed oil solution drying into the final cardboard postal tubes.
I altered the tolerances of the rings in which the postal tubes lock into by increasing the outer edge by 1mm. This will make it easier to assemble the beehive on site.
I also experimented with ropes interlocking through the postal tubes and beehive components to help hold the tubes securely with the rest of the hive.