On Fri, Oct 12, 2001 at 08:02:12AM +0100, Alan Riach wrote:

> So the question is - with screened bottoms should the top be open or
> close or does it matter.

It depends on how much snow you get.  We get quite a lot here (generally
nearly 3 feet by the end of December), and so the bottom board is quickly
buried in the snow and stays that way until about mid-April.  Since
the snow pretty thoroughly prevents any air currents or drafts from
blowing past the screened bottom, a top opening is vital for maintaining
ventilation.  Besides, with the deep snow I need to provide a top entrance
so they can make cleansing flights during the late-january thaw, so it
makes sense for the entrance to provide ventilation, too.

--
Tim Eisele
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