On Nov 9, 7:25*pm, Robert Neville wrote:
RicodJour wrote:

Closed cell is around twice the price of open cell, but it is
superior.

Closed cell may have a slight edge on thermal efficiency, but it's not always
the best solution.

It is pretty much the only solution for spraying rafter bays in an
attic. It's more about permeability than R-value.

R