Work is progressing on our on-farm butcher shop, which among other techniques includes ferro cement and vaulted masonry ceilings. Recently I've been doing a lot of conduit work for the future electric so it will be embedded in the reinforced
concrete walls so as to leave the surfaces of the walls smooth and easily cleanable to meet and exceed USDA standards of inspection. The other day I ran into a little puzzle. I found
water inside tightly sealed cans of PVC cement... How did it get there?
http://SugarMtnFarm.com/2012/09/28/mystery-question-wet-cement-a-locked-door-murder/
Something to bend your brain around.