Advertising for approved designs must be reviewed by BCI for accurate content. BCI will provide a letter of certification for manufacturers that can be copied and included with approved models. By providing suitable houses which successfully attract bats, manufacturers can further conservation efforts as well as strengthen their sales. As a result, everyone benefits. Roosting chambers or crevices must be a minimum of 20 inches tall.
Greater widths are preferred.
Rocket or post style houses are an exception. Bat houses must possess a suitable landing area. Rocket or post style houses are an exception, as a rough-cut 4 x 4 post serves as the landing area. Interior surfaces and landing areas must have adequate texture to provide footholds for bats. Metal hardware cloth or aluminum window screen is not acceptable, as it may cause injury to bats.