When testing new materials, it is best to make the partitions removable so that if the material wears out and needs replacing, the whole bat house won't have to be thrown out or torn apart to get to the inside.
Make the partitions removable by using a small cleat attached near the bottom on each side. The bottom of the partitions will rest on the cleats.
Make the cleats removable by using thumbscrews.
Good luck, and keep us posted on how the material works out over the years.
Cheers,
Mark Kiser
bathouses@batcon.org