Originally Posted by
shine
yes it does. foam-it-green is a closed cell foam but it still holds water. or they say it is . i'm no foam expert. i do have friends with foamed shops that have had problems. my shop is done with water bags :) but it is 20 years old and so far so good. i can see where it has leaked but no rust through or problems yet. if i had it to do over i would have a wooden shop . metal building roofs suck. they sweat and rain or they pull screws loose and leak .
i was skeptical of flexseal but after using it i know it works. i rolled it over the seam of the add on and it has lasted 2 years. going up before winter and doing another coat.