Do you have a problem with woodpeckers knocking on your house? It can sometimes mean that they are drilling holes looking for their next meal. However, the more likely reason is that it is a male trying to impress a female. They will often "drum" on gutters, downspouts and trim during their breeding season. I get a lot of folks coming into the shop asking if there is anything they can do discourage the drumming. There is a new product called the Birds-Away Attack Spider that may help. It is a large spider that you hang from your eaves. The spider is sound activated and drops down on a string and makes noise whenever a woodpecker starts drumming. The Attack Spider is not too expensive and may be the solution you've been looking for. Come by the shop if you're interested in giving one a try.
