I've also thought about putting a heat lamp in the roof of one for the spring to heat it this would allow for other materials summer will take care of it self with the ambient temperature.

If you talk to the Animals, they will talk with you. And you will know each other. If you do not talk to them, you will not know them. And what you do not know you will fear, What one fears One destroys." Chief Dan George-Tsleil-Waututh Nation Next time your scared by a bat remember 8 million have died from White Nose Syndrome 1 bat=5 lbs bugs/year=1-2 million mosquitoes/year 1 small bat house = 250-700 bats you do the math. West Nile Virus infected 5287 people killed 243 last year is your home protected? http://fewerr.org/Pictures/WNV_Bat_Mosquito_yellow%202.pdf

http://www.fewerr.org/PDF/bookfly1.pdf