We found these screws in the aluminum siding section of a home center but a gutter supplier would be another good source.
How to assemble galvanized gutters.
Start by pushing the female end of a downspout elbow onto the first outlet fitting.
Overlap at each end.
Measure the distance between these fittings and cut a short length of downspout to join the allowing for about 1 1 2 in.
The brackets should be nailed or screwed to the trim board as close as possible to chalk line.
Screw an elbow to the downspout outlet.
The gutter will need to have a downward pitch of 1 inch per 16 feet directed toward the downspout.
Allow for a 1 1 2 in.
Feather the roofing cement out on the surrounding area to flatten any steep edges.
When you re assembling them make sure that any factory cut edges are on the outside whenever possible for a neater appearance.
Then hold a second elbow against the corner of the house in line with the first elbow.
Bend the strip to fit and embed the flashing in the cement.
If the holes are larger than nail holes use tin snips to cut a strip of flashing the same amterial as the gutter wide enough to fill the area.
Apply plastic roofing cement over small holes.
Follow all manufacturer s recommended instructions for installation and mounting of the brackets.
Cut the panels to the desired length.
Of insertion on one end.
Allow for a minimum of 18 inches 46 cm if you need to lap to complete the run.
Assemble gutters by overlapping seams anywhere from 3 to 4 inches or by the extra amount you allowed for during cutting.
Make a mark with a pencil for the bracket s screw hole.
Then use rivets to join the pieces and caulk to seal the seams.
Use a water level to make a matching mark at the downspout end.
At the high point of the gutter s run hold a bracket and a section of gutter against the fascia with the gutter s outer lip just under the plane of the roof.
Use a hacksaw to cut this length from the uncrimped end of a downspout tube.