The roof on my three story, 75 year old house was replaced three years ago and included an ice barrier. They rehung the gutters because they were in good shape. Since then, I've been getting terrible icicles and I'm told I need new gutters which can only be installed with straps. Is it true that gutters must have straps unless you're doing the roof? Straps look terrible on the roof and I'd like to know if new gutters can be installed without ugly straps?