**Originally Posted By: Guest**

**This post was automatically imported from our archived forum.**

180sf (most of the roof) average depth= 1.5 inches …

180x144(to convert to sq inches) =25,920 x 1.5= 38,880 cubic inches divided by 268.8(cubic inches in a gallon)=144.64 gallons x 8.38

(lbs per gallon)= ~1,112 lbs divided by 180 square feet =6.73 lbs per square foot. There’s easier ways to figure that out but I only know certain specs about water.

It'll hold it, but it's far from ideal. Either a roof drain should be installed (or cleaned) or measures should be taken to raise the center of the roof.

It's going to leak and when it does it'll guarantee up to 150 gallons of water inside the structure.