How Much Runoff In Washington Roof

If your roof plan is more complicated break it up into smaller.

How much runoff in washington roof.

Roof repair replace entire roof install new roof skylight other or call us directly 1 888 668 8262 though the average lifespan of a roof can be dependent on the materials used the quality of the work done and the conditions of your home there is pretty much a guarantee that at some point in your life as a homeowner you will have to do roof. To calculate the runoff from any given rainfall. The system outlined below will walk you through the steps of determining your rain barrel sizes based on average roof runoff. You can help solve our winter stormwater runoff problems by connecting a hose to the drain valve on your rain barrel or cistern and running it out into a lawn or landscape.

The study plan can be found at the link below. 1981 2010 source national weather service. In this example 600 x 240 x 1 144 000 cubic inches of water. Take the dimensions of the footprint of your roof and convert them to inches.

For a rectangular house this is simply done by multiplying the length by the width of the roof. Rain barrel supplies list. The rebate is available for residential or commercial buildings. For example in 2001 during a major storm at peachtree creek in atlanta georgia the amount of water that flowed in the river in one day was 7 percent of all the streamflow for the year.

So a 50 x 20 roof is 600 x 240 multiply the roof dimensions by the number of inches of rainfall. My own house with a metal roof of course is a 12 12 pitch and everything is just fine. To get an idea how much water the roof of your own house might yield use the rainfall harvest calculator above. I do suggest hanging gutters as high as possible so that water does not over shoot them.

When you look at the numbers it s surprising how much water you can collect every time it rains. Before you know what size rain barrels or cisterns to install you will need to calculate the average amount of rain runoff from your roof. For sample purposes a 55 gallon barrel will be used. Then just open the drain valve in october and let the barrel slowly drain out between big storms to slow our runoff all winter.

Step 1 calculate the total area of your roof. Runoff of course occurs during storms and much more water flows in rivers and as runoff during storms. Just a half inch of rain falling on a 1 000 square foot roof will yield 300 gallons of water. When installing a metal roof that has considerable formed thickness to is such as a shake or tile profile using 6 gutters would work better than 5 again to keep.