Rochester Gutter Company custom makes 2 sizes of seamless aluminum gutters. 5-inch is the standard size that is used on most residential applications. All of our 5-inch guttering is manufactured on location using high quality aluminum coil stock .027-gauge aluminum and .032-gauge aluminum. Our roll forming machines are state of the art and, when using these heavy gage aluminums, produce a product that can withstand ice build up. Also, you can place a ladder against any area of the gutter system with confidence that the gutters will not bend.