# Rain Gutters that Trap Water: Easy Fixes

## Gutters that trap pools of water need to be adjusted so they’re inclined at ¼-inch of slope for every 10 feet of run.

Long runs of gutters are purposely raised in the middle so water flows to either end. Image: dmr-gutters.com

To prevent gutters from trapping stagnant pools of water, they need to be pitched toward the downspouts for proper flow. That means an incline of ¼-inch of slope for every 10 feet of gutter. Set at the correct incline, your gutters should drain completely.

Check the pitch of your gutters

Get up on a ladder and look down the run of the gutter. Long runs of gutters are deliberately high in the middle so water flows toward downspouts at each end. Look for any peaks or valleys along the way. If these are slight, correct the problem by bending a few hangers up or down. If the problem is more serious, reset your gutter.

Calculate the drop

Take these simple steps to work out the amount of incline—or “drop”—needed:

• Measure the length of the run of your gutter.
• Divide the length by 10.
• Multiply the result by .25 to get the amount of drop from one end of the gutter toward the downspout.

For example, a run of 38 feet should have a drop of about 1 inch (38 ÷ 10 = 3.8 x .25 = .95).