Re: Noisy Downspout
I would agree with Reenie that it's probably loose straps. Make sure that all the straps are tight, if there are any loose ones, tighten them. If the fasteners don't hold, change the type of fastener. I would only recommend the foam as a last resort. Another issue is that it could be vibrating against the gutter. Run a screw through the downspout and into the scupper (drop tube from gutter) to stabilize the connection. You'll want to use a screw here so that you can remove the downspout for cleaning or repair when necessary.
I suffer from CDO ... Its like OCD, but in alphabetical order, LIKE IT SHOULD BE!!!