You want at least a quarter inch of slope for every 10 feet.
Slope of a gutter.
It should pitch from the middle toward the downspouts at each end.
A gutter over 30 feet needs two downspouts.
For gutter runs longer than 40 feet it s best to pitch the gutter down from the middle to a downspout at each end.
Or you can slope the gutters down from each end toward a single downspout placed in the middle of the run.
To correct this yourself you ll need to measure from the peak to the downspout.
Use the bubble on the line level to make sure the line is level the length of the gutter area.
A gutter over 30 feet needs two downspouts.
Gutters need to be pitched toward the downspouts for the water to flow properly.
If there s standing water it s not pitched properly.
A gutter apron is a bent piece of flashing that tucks up under the shingles and over the gutter.
The gutter apron will prevent the dripping.
To get started measure the side of the house directly under the gutter to determine its length in feet.
Start on the end of the gutter farthest from.
The gutter slope also called the pitch is the amount the gutter tilts down to let rainwater flow out of it.
Multiply the number of feet by 1 16 inch to determine the total slope the gutter requires.
If gutters slope too severely they don t hold water and water could splash over the sides in heavy rain.
For spans longer than 40 feet it s wise to have a downspout on each end and start the high spot of the gutter in the center.
How to calculate slope for rain gutter installation.
Home centers sell a gutter apron in 10 ft.
For example if the gutter is 16 feet long the end near the down spout must be 1 inch lower than the starting end.
Place the line spirit level on the string.
If water is dripping behind your gutter it s probably because it was installed without any flashing over the back of the gutter.
The amount of collected water increases until it spills over the sides of the gutter.
If gutters don t slope water gathers in them.
Get on a ladder after a rainstorm and look in the gutter.
Technically speaking the slope also called the pitch of the gutters is the amount by which the gutters slant downward along the path of the water flow.
This means that your gutter should be a half inch lower in height at every 10 foot mark until you reach the downspout.
How to fix gutter slope measure the length of the gutter that you plan to adjust.
