Any Ideas to RepaIr Loose Ceiling on NLcamper?

notsobigjoe wrote:
what is bead board?

It is foam board or rigid foam insulation made of small round balls or beads of various sizes, usually around 1/8 inch in size that are formed together into sheets of various thicknesses of rigid foam board. Northern lite uses this for insulation because it is less rigid and will glue and flex onto compounded curves and shapes to insulate and strengthen the fiberglass shell. Keeping it lightweight.