SHORT ANSWER: No, it's not safe to lean a ladder against a gutter. Make sure you lean your ladder against a strong resting point that's sturdy enough to support it.
What is a ladder standoff?
A ladder stabilizer (also called a stand-off) is an accessory with wide tubular arms and non-skid rubber pads that grips a house wall, increasing both a ladder's stability and your “reach”working aloft.
How do you set up a ladder to clean gutters?
https://www.youtube.com/watch?v=iyAxLBEh-t4
How much weight can gutters hold?
Clogged Gutters Water is heavy, 8.34 pounds per gallon. And one foot of 5" K-style gutter found on a typical home can hold about 1.2 gallons of water (6" K-style gutters hold about 2 gallons of water per foot). If you can imagine a typical 20 foot run of gutters filled to capacity would be holding around 200 lbs.Sep 21, 2020