I need to insulate our garage before setting up a work shop, at present there is no insulation so its all ready to go. I need to know what is the best insulation to use that would deter a possible invasion from the carpenter ants in the area. They invaded once 2 years ago, but with no insulation it wasn't a problem to get rid of the little @#*. Sooo, what is a good product to use??? Fiber glass they use as a highway, foam will give them a nice home - what other options are out there???

Thanks so much, all past info has been greatly appreciated and acted on. Very sincerely Normwantabe