Gutters need to be appropriately selected to accommodate water accumulation and get it delivered to the downspouts and away from the structure of your home. The speed at which water gets directed into your gutter increases with the pitch.Ī higher pitch results in a higher speed of water flow. Pitch – aka, how steep your roof is – is another key factor to consider when choosing your gutter size. In this case, we also recommend a 6” gutter as a longer overhang equals less water in the gutter. If you recently replaced your roof and your roofing contractor extended your shingles more than 1.5 inches past the roof edge, water will most likely overshoot the gutter during a heavier rainstorm. On the other hand, if your roof’s plane is 1,400+ square feet, we recommend putting on 6-inch gutters as this results in double the water amount going into your gutters. The plane refers to one complete area, which includes four edges, typically one side of a gable or hip. The bigger the square footage of the roof, the more water goes into the gutter.įor example, if your roof’s plane is 600-800 square feet, you should be fine with having 5-inch gutters. The optimal size of the gutter you need will depend on the amount of water the gutter needs to handle. In fact, 6-inch gutters can hold about 50% more water than 5-inch gutters ! When choosing the size of your gutter, we need to take into consideration a couple of factors: As you can see in the picture above, that one extra inch makes quite a difference.
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