How do you install downspouts to vinylsiding?

Answer 1

The most important issue is making sure the vinyl siding has been installed properly. If all the nails have been put into the center of their slots and not nailed down too hard it should be fine to put a screw into one place in the vinyl. I prefer to use the prefabricated straps and sink panhead wood screws so they are about one turn past just touching (or 1/8") the vinyl. Usually you need to have 1.5" screws. Then sink one panhead metal screw through the strapping into the gutter. make sure to calk over / behind all the screws, especially on the vinyl. Do this 18" form the top and the bottom of the downspout, and if the downspout is greater than 10' in length extra strap(s) so no distance between straps is greater than 10'.