These gutters have been installed with a fixed metal gutter guard. There are gum trees all around.
The guard would have been installed to prevent the gutters from blocking with gum leaves and the long stringy bark that the trees shred.
When installing this type of gutter guard where gum trees and other deciduous trees lose a lot of litter, it is a good idea to have a gutter cleaning maintenance program. The litter does not fall into the gutters any more due to the gutter guard. It sits on top.
Over time the debris breaks down and falls through the holes in the guard. This is a nutrient rich composition for grass and moss to grow. Birds and wind drop seeds into the gutter and it grows in this perfect environment.
If you go to the trouble and expense of installing this fixed metal gutter guard, you need to put in place a gutter cleaning program. Removing the debris from on top of the guard and maybe completing a spot clean to under the guard every six or twelve months will keep the build up to a minimum.
Having the two go hand in hand and will keep the debris off the roof and slow the break down of matter into the gutter. This will prolong the life of these gutters.
However, if you only install the gutter guard and expect to never have to clean the gutters again, you would be wrong.
Here is a prime example of leaving the corrosive debris to sit in the gutters.
The shed had no guard on it and was left too long in between gutter cleans. An annual clean to the shed gutters will slow any corrosion and keep these gutters in good condition for a lot longer.
Gutter-Vac Tasmania can help you create a maintenance program that is specific to your situation. Whether you have gutter guard installed or not, you should probably be completing regular gutter cleans to your gutters so they do not deteriorate as quickly and you get longer use out of them.