Did a tear-off of the built-up bitumen roofing, and discovered this. The construction is concrete block walls with 24″ deep bar joists about 36″ oc, then 1/2″ fiberboard laid on the bar joists, wire mesh draped across the whole area, then filled with 2-3″ of gypsum. Building is from about 1970. The gypsum is ok material, but it won’t tolerate getting wet and freeze-thaw cycles. This roof is flat with a nice slope to the rear … but then there’s a 12″ parapet with a couple of scuppers. Whe it started leaking, all the water ponded at the back, and caused this damage.
To make it worse, they started stripping the old roof on a Friday, tarped it that night, and it started raining about 1:00 am. Of course the tarps didn’t hold. Got quite a bit of water inside.
“Put your creed in your deed.” Emerson
“When asked if you can do something, tell’em “Why certainly I can”, then get busy and find a way to do it.” T. Roosevelt
Replies
well that really stinks
Afraid you don't have enough structure there for a nice PAHS-style dirt and umbrella installation. Otherwise, great potential.
Steel decking works nicely for spanning barjoists.
PAHS Designer/Builder- Bury it!
You need some bags of SakRoof.