Determine the slope of the eaves on the long porch roof to confirm the natural direction for the gutters to route the water. Use a small line level attached to a string to create a "level" - as long as the length of the main porch - in this case 36 feet. Have a helper stand on a ladder at one end of the porch and hold the string taut as you balance the bubble in the level. The slope is about 4 inches on a length of 36 feet, a significant drop that will facilitate channeling the rainwater into a downspout installed at the far left side of the short porch roof. Another downspout will accommodate the side of the porch.
