Almost 100 years ago, straw hives with frames were already used for beekeeping. The hive has a wooden bottom, the entrance hole is only a small slit, the side walls are made of straw and the lid is a double-walled wooden construction with straw filling. In these hives there were no problems with mould and condensation, although the lid construction is not highly vapour permeable. The construction demonstrates that humidity can also be carried away through the side walls by diffusion. Further information under Diffusion and D-Lid.