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Roof Size and Annual Rainwater Yields

Annual Rainwater Yield (in gallons) for various roof sizes and amounts of rainfall

Table 1.0
Annual Rainfall Yield in Gallons for Various Roof Sizes and Rainfall Amounts

 
 
ROOF SIZE                                   
(SQ. FT.)                                                         RAINFALL (IN.) 

                                  20          24        28         32          36          40        44          48         52

1000                    11236  13483  15730  17978  20225  22472  24719  26966  29214

1100                    12360  14832  17303  19775  22247  24719  27191  29663  32135

1200                    13483  16180  18876  21573  24270  26966  29663  32360  35056

1300                    14607  17528  20450  23371  26292  29214  32135  35056  37978

1400                    15730  18876  22023  25169  28315  31461  34607  37753  40899

1500                    16854  20225  23596  26966  30337  33708  37079  40450  43820

1600                    17978  21573  25169  28764  32360  35955  39551  43146  46742

1700                    19101  22921  26742  30562  34382  38202  42023  45843  49663

1800                    20225  24270  28315  32360  36405  40450  44495  48540  52584

1900                    21348  25618  29888  34157  38427  42697  46966  51236  55506

2000                    22472  26966  31461  35955  40450  44944  49438  53933  58427

2100                    23596  28315  33034  37753  42472  47191  51910  56629  61349

2200                    24719  29663  34607  39551  44495  49438  54382  59326  64270

2300                    25843  31011  36180  41348  46517  51686  56854  62023  67191

2400                    26966  32360  37753  43146  48540  53933  59326  64719  70113

2500                    28090  33708  39326  44944  50562  56180  61798  67416  73034 

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Peter B. Savio is President and Chief Executive Officer of the Savio Group of Companies. Peter has more than 40 years experience in real estate development and sales in the Hawaii market; he has been helping his clients realize the maximum return on their real estate investments since he founded Savio Realty Ltd. in 1980.


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