To calculate the drainage area of your roof, measure the length and width of each roof surface that flows into a particular gutter and multiply these dimensions by. Once you have all the measurements, you're ready to determine the right gutter size for your home. Take the square footage of the drainage area and multiply it by the roof's slope factor, as well as the maximum rainfall intensity. This number is called adjusted square footage and you can use it with the following table to determine the recommended gutter size for your home.
If the different drainage areas of your roof require different sized gutters, choose the one that is larger. Plan to have one downspout for every 25 to 30 linear feet of gutters. Measure the distance from the roof line to the floor, plus at least 4 feet for a gutter extension. Multiply this by the number of downspouts that are needed.
First, use width and depth measurements to calculate the cross-sectional area of your gutters. For example, if your gutter is 5 inches wide and 4 inches deep, its area is 20 square inches. Weather Bureau collects rainfall intensity in specific regions, which is useful for determining the size of gutters. Regularly inspect your gutters and downspouts for signs of damage or wear, and resolve any problems promptly to prevent water damage your home.
When choosing the best gutters for your home, consider the size of the gutters, as it affects how they will handle water flow. The size of the gutters also affects material costs, the performance of the gutters, and the choice of gutter protectors that will fit your system. Although they offer more capacity than 5-inch gutters, they absorb less water than K-type gutters of the same width. I have one side of a shed that needs about 12 inch gutters and then 2 inches around from the back to place the downward spout.
Its rounded shape allows for smooth water flow, but offers less capacity compared to K-type channels of the same width. The most important factors in determining the size of your new gutter system are the square footage and roof pitch and the rainfall rate of your area. If you are replacing your gutters, have water-related problems, or are building a new home, you should ensure that your gutters are the right size to support the volume of water typical of your area. Increasing the slope increases the handling capacity of a gutter, but it is possible that the gutter looks crooked in the long term.
Either option should work for your home, but homes with large or steep roofs may consider 6-inch semicircular gutters to keep them from overflowing. The larger the roof and the steeper its slope, the more water flow the gutters must be able to withstand. Finding the right gutter size for your home can be difficult, especially when calculating the inclination of the roof manually.
