Icicles are not caused by your gutter protection; in fact, icicles are an indication that your gutter protection is working. Here’s what happens: as you know, heat rises. If you have inadequate insulation in your attic and/or little or no ventilation in your roof, the heat from your home rises and heats up the attic area. That heat then warms the roof and with the help of the sun, starts to melt the snow sitting on your roof. As the water trickles down, it comes in contact with the cold aluminum of the gutter protection and re-freezes. Eventually, those small trickles of water become icicles. But remember, without gutter protection, where would that water go? Into your gutter where it would re-freeze, buildup and add considerable weight to the gutter, which could cause the gutter to pull away from the fascia or gutter board. See next question.