Roofing gutters should slope down toward the downspout at what rate per foot?

The correct rate at which roofing gutters should slope down toward the downspout is 1/8 inch per foot. This slope is important for ensuring proper drainage of water. If gutters are not sloped adequately, water can pool in the gutters, leading to issues such as overflow, which can cause damage to the roof, walls, and foundation of the building.

A slope of 1/8 inch per foot provides a sufficient gradient that facilitates the flow of water towards the downspout without being too steep, which could cause water to flow too quickly and potentially splash out of the gutter. This balance helps maintain effective drainage while minimizing the risk of water damage and maintaining the integrity of the roofing system.

The other rates offered, whether 1/32 inch, 1/16 inch, or 1/4 inch, do not provide the ideal slope needed for effective drainage in standard applications, either being too shallow to encourage good flow or too steep to ensure water remains directed within the gutter system.