dbrannon79
I'm getting there!
I didn't know one was made that dense. I was thinking about that foam they use in the hulls of boats. I re-floored an old 70's trihull once. when I ripped all the floor out for replacement I found all the foam inbetween the runners water logged. I had a time carving all of it out to uncover the glass coated runner supports, luckily the glass was still intact well enough those hadn't rotted except for the entire transom. nothing left of it other than the layers of glass and hull!2 lb density closed cell is moisture resistant.
I have it on my foundation walls.
Pink board and blue board will soak up water like a sponge
you couldn't tell the foam was wet until you stuck a knife into it cutting a slice. then all the water started showing.