Have a helper turn on the water and check for downspout flow.

How to cut gutters and downspouts. How to cut downspout in order to connect it to the gutter: Crimp all the way around the downspout to a depth of at least 1 inch. Hold it securely in place.

Start cutting on the other side, until you reach the bottom once again. Flip the aluminum section over so that the bottom lies against the surface of your worktable. If needed, use a file to smooth any rough edges.

Secure the seam with two sheet metal. Grab the pattern shears and cut along the marked line. Place the sleeve in the space that is left from cutting it out.

Cut through until you are at the bottom of the gutter. In order to cut a metal gutter downspout, you will need a hacksaw. Insert the top crimped section into the lower section as far as it will go.

If you have an older one already installed, measure the existing downspout for perfect measurements by. Before you cut the downspout you will want to have a line on all four sides of the vinyl gutter. Start by cutting a flange edge using your pattern shears.

First, measure the height of the downspout from the top to the bottom. First, mark the spot where you want to cut. Climb up to one corner and hook the end of a chalk line at the point where you want the top edge of the gutter to terminate.