Gutter sizes--can you get 4" aluminum?
We need to replace our gutters, and are in the process of getting bids. We need 4" gutters. Two companies are telling us that the minimum size for aluminum gutters is 5" unless they are custom-made, so we need to go with galvanized steel. The third company says that no, aluminum gutters are definitely available in 4" and quoted us for that. I can't seem to find references to 4" aluminum gutters anywhere online. Anyone have a clue as to whether this actually exists?? (We actually have no strong preference between the two--the current steel gutters lasted 40+ years--but I'm trying to figure out whether the third company knows what they're talking about or not, since they are also the lowest bid!) Thanks!