The is no one best gutter protection product. There are tons of hoods and systems available and everybody claims to have "the best". I would suggest that you research and make an educated decision. ... read more
Scott,
The easiest thing to do is check in the attic and look at the sheathing. If there is any mold growth, you can tread it with a proper mildewicide and make sure that the fan ducting is extended ... read more