Whats best, aluminum or steel gutters?
Both products work well in this region. The advantage of aluminum is that it will never rust out. The disadvantage is that it is a softer metal and is more susceptible to damage and denting. It also has a higher expansion co-efficient than steel, thus warping and moving more. The prepainted steel gutters, with their superior strength, have a Galvalume finish that is warranted not to rust through for 20 years.
