Oct 12, 2016 · Metal roofs are much lower weight than most other roofing materials. Aluminum roofing weighs around 50 pounds per 100 square feet and most steel roofs are 80 – 100 pounds. Feb 17, 2015 · Fluid force on submerged sheet: The sheet metal is submerged horizontally in 8 feet of water. The weight density of water pounds per cubic foot. Total area of the sheet is square feet. Formula for fluid force is , where is pressure and is area. The fluid pressure is . pounds per square feet. pounds. Solution: Fluid force pounds.
Jessica, If 32x48 is the size of the sheets (presumably in inches) then (a) you do not need to know this information, except to round up to the nearest whole number of sheets; and (b) you do need to know the gauge and composition of the sheet metal, which you have not stated. Metal roofing is equivalent in cost to other premium materials—from about $150 to $600 per square (100 square feet). Because of the material’s long-term durability, the trick is that you ultimately save the difference (and more) if you stay in the house for a long time and, of course, you save on seasonal maintenance. On a 1000 square foot structure, you can collect 600 gallons of water from a 1" rain. Rule of thumb: plan your system to hold a 2” - 3” rain event. Over the course of year, many clients could collect 30,000 or more gallons of rainwater.