You want at least a quarter inch of slope for every 10 feet.
Correct pitch for gutters.
Get on a ladder after a rainstorm and look in the gutter.
Granade roofing on another awesome seamless gutter project adjusting a section of gutter to get the proper flow of water.
For example for every 10 feet of gutter they need to drop 1 2 inch from the high end to the downspout.
Gutters need to be pitched at a 5 degree angle.
This means the downspout end of the gutter should be set 3 4 of an inch lower than the other end.
For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e.
However for gutters to function correctly they require a slight slope called a pitch which causes rainwater to flow to the downspouts.
Myself though i always pitch my gutters at least some minimal amount.
To ensure the adequate drainage your gutters should be pitched approximately inch per 10 feet.
Level gutters may be sized by charts 1 1 1 2 or 1 3 e sloped gutters may be sized by chart 1 3.
Gutters should be placed below the extended roof line so that snow and ice can slide clear.
For a 30 foot gutter thats 1 7 8 inches of crown and ive never done that much.
Gutter can be run level for appearance but addition downspout will be necessary see section on proper gutter and downspout sizing.
But the correct answer is it depends.
As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering.
How to adjust a gutter s pitch.
This allows the water to flow gently but.
Formulae for flow in gut ters with different pitch are not available.
Steeper pitches require less clearance.
Had to edit my post as 1 8 is way too much.
Since gutters settle as screws and brackets loosen it s a good idea to periodically check the pitch of the gutters and adjust them if needed.
In theory if your gutters are dead level the ice and mud wont be very deep.
If there s standing water it s not pitched properly.
To correct this yourself you ll need to measure from the peak to the downspout.
Plus it looks nicer on the facia.