Often the spike that secures them to the fascia board has simply worked loose.
Fix sagging gutters.
Get on a ladder after a rainstorm and look in the gutter.
If your gutters use long spikes or nails that go through the front of the gutter replace them with threaded spikes for a more secure fit.
Luckily sagging gutters can be an easy fix with a ladder and a few simple tools.
The best solution is to replace it with a gutter screw.
Gutters need to be pitched toward the downspouts for the water to flow properly.
The screw is inserted through the gutter and ferrule and then driven into the fascia board deep enough to support the gutter but not too deep to collapse it.
You want at least a quarter inch of slope for every 10 feet.
After that install the replacement hangers and make sure they re tight against the fascia.
Next inspect the hangers and replace damaged ones with new ones from your local hardware store.
To correct this yourself you ll need to measure from the peak to the downspout.
In some instances the gutter actually bends onto itself whereas in other cases the gutter supports can come loose or break completely.
If the metal is bent or compromised it s best to remove and replace the entire section of gutter.
Determine where your gutters are sagging.
If there s standing water it s not pitched properly.
If you have u shaped brackets holding your gutter from underneath change out the ones that are broken or loose.