Criteria for Successful Bat Houses 1. Taller and wider houses are even better.
Most houses have one to four roosting chambers the more the better.
All partitions and landing areas should be roughened. Include vents 6 inches from the bottom of all houses to be used where average July high temperatures are 85 F or above. Construction A combination of exterior plywood and cedar is best. Do not use pressure-treated wood. Any screws, hardware or staples used must be exterior grade or galvanized.