Six-inch gutters have a larger top opening on them which helps catch water when it rushes down metal and tile roofs, and having them on such roof applications is almost a necessity. Also, large low sloping shingle roofs will require a larger gutter. A good rule of thumb is to use a larger gutter on all metal, tile, and large low sloping hip roofs.
Six-inch gutters can handle more water and can also be installed with a smaller number of downspouts. Five-inch gutters tend to need more downspouts, handleless water, and only apply to smaller roofs and low water drainage situations in Florida. Due to the low amount of 5-inch gutters installed in our area usually, the price difference is almost non-existent. Only a few material suppliers stock the materials needed to install 5 inches due to low demand.
Excel Aluminum recommends a 6-inch gutter for almost all installations except repairs on existing systems and spaces where 6 inches simply will not fit. Call us now to get an expert opinion on your gutter system, leaf covers, and optional underground applications.