RTardis

Hello all; We have just begun a total redo of our 1990 Odyssey with hopes to hit the road full time next summer. We have gutted the interior, except the range and refrigerator, and are now working on replacing some wood rot in the overhead cab cone area. We have fiberglass sides and a rubber roof sandwich, rubber-luan-styrofoam-interior ceiling panel. What type of glue is best to use to adhere the luan to styrofoam to ceiling panel? Thanks to all who respond to the first of what will be gazillion questions. So happy to find this forum and all the great information.