Money Back Guarantee:
GuttaFilta™ is not warranted against damage caused by any form of wildlife including all birds, bush turkeys, possums, rats, mice, snakes, etc.
Whilst GuttaFilta™ will assist your gutters to be efficient and will greatly reduce the instances of overflowing. Fitting GuttaFilta™ will not, however, guarantee overflowing will not occur.
Overflowing can caused by many other variables - such as inappropriate gutter size, inappropriate down pipe size, inappropriate number of down pipes, whether your down pipes are blocked or not and the amount of rain, etc, etc.
Generally, because GuttaFilta™ keeps your gutters clear of debris, your gutters are far less likely to overflow with GuttaFilta™ than without it.