Pour calcium chloride pellets into one leg of the pantyhose.
Tie the leg off every 5 to 6 inches, creating separate compartments for the pellets. This prevents the pellets from gathering in the foot.
Repeat for the other leg and securely tie off the pantyhose at the waist.
Repeat the process so you have enough ice melters to lay across your roof every 5 feet.
Set up a ladder to gain access to the roof.
Place the ice melters vertically on the roof. One foot should hang just over the gutter. The other leg should rotate 180 degrees so that the other foot reaches for the roof ridge.
Place one every 5 to 6 feet across the roof.