What is the recommended slope for roofing gutters toward the downspout per foot?

The recommended slope for roofing gutters toward the downspout is 1/4-inch per foot. This slope is essential to ensure proper drainage of rainwater. When gutters are angled correctly, the water can flow smoothly toward the downspout rather than pooling or overflowing, which can lead to water damage, mold, and other serious issues.

Using a slope of 1/4-inch per foot balances efficient drainage while preventing excessive steepness, which could cause the water to move too quickly and potentially dislodge debris that might inhibit flow. The other options, while they may suggest different degrees of slope, do not provide the same effective drainage without risking potential problems associated with inadequate or excessive flow. A slope that is too slight may not encourage proper drainage, whereas a slope that is too steep may cause turbulence in the water flow. Therefore, maintaining a slope of 1/4-inch per foot strikes the right balance for effective gutter performance.