This is one of my summer projects.
- North Wing: 24×60
- South Wing: 23×48
- Great Room: 26×26
- Studio: 32×18
- Garage: 40×60
Total area of roofs: 6096 sqft
Last Year’s Rainfall: 17.5 inches
SUPPLY (gallons) = INCHES OF RAINFALL X 0.623 X CATCHMENT AREA (sq ft of roof) X .90 (runoff coefficient for a metal or asphalt roof)
59,815.476 gallons of rain water to plan to try collect this coming winter.