covered wagon wrote:
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.
I am a little more cynical - they use it because it is cheaper than something better. There are plenty of choices in structural foam that are much better than bead board for this application. They cost more. XPS costs only a little more, a PVC or SAN core (which is what would be used in a boat) costs quite a bit more.
If I was pulling down the ceiling for a repair, I'd put back XPS rather than EPS.
