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Beekeeping for All:
With Warré hives in some climates, condensation has formed under the mouse board in the roof. This is more likely to happen if the board is made of a single sheet of plywood instead of several pieces of thin plank loosely butted together along their edges. The latter arrangement is probably more vapour permeable than ply.
One solution is to drill several small holes in the mouse board. Alex Templeton's solution is to put mesh-covered vents on all four sides of the quilt near its top rim. The images below illustrate the modification.
Note: Alex now recommends putting the mesh of the outside of the holes to prevent small creatures occupying the tubular spaces formed.
Note: Alex now recommends putting the mesh of the outside of the holes to prevent small creatures occupying the tubular spaces formed.
The modified Warré hive of Jean-Marie Frèrès & Jean-Claude Guillaume, sometimes abbreviated to 'Warré-FG' addresses the issue of ventilation at the top of the quilt by providing a ventilation chamber immediately under the roof inside the roof unit. Full details can be found here.