Using
this basic design, you can add partitions and inches to your design. My
bat house expert tells me that bat houses cannot be too big, in fact,
the bigger, the better. There should be slots for passageways (as shown
on the inside partition) so that the bats can get from one section to
another. Two houses mounted on poles back to back provide a temperature
range. You can also use aluminum sheet metal siding material to cover
the plywood roof.