Typical Residential Gutter Size

The sizes available in this style are 3 4 5 and 6.

Typical residential gutter size. The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website. The definitive guide to gutter sizing five inch k style gutters or 6 inch half rounds the most common residential sizes are able to handle the rainfall on most houses in most parts of the country. Furthermore the standard norm for gutters among many in the rain carrying industry is to allow 1 square inch of outlet opening in the gutter for every. Now architects engineers designers and contractors can easily and accurately size downspouts and gutters according to the specifications in smacna s architectural sheet metal manual 7th edition 2012.

Residential sizing samples are available to check the optimal fit but in most cases the 5 half round gutter requires standard gutterbrush for 5 gutters 4 25 dia while the 6 half round gutter requires oversized gutterbrush for 6 gutters 5 25 dia. A larger size gutter system will generally be more expensive. Most residential gutter systems use 5 gutters or 6 gutters. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

This type of down spout is considered the standard downspout style in households and is used with a 5 k style guttering system. How to size gutters downspouts. When you are completing a gutter replacement the first point to note is that gutters come in different sizes. Each gutter style comes in two sizes and each has the capacity to.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Then use the information below to see what size gutter you need. 5 inch 5 520 square feet. The size of the gutter should never be selected for the amount of water it can hold gutter size refers to the opening at the top of the gutters and not to the depth of the gutter channel.

It also comes in sizes 2 3 and. But houses with big steep roofs or those located in climates prone to heavy downpours may need wider gutters and extra downspouts to keep. Downspout sizes must not exceed the bottom width of the gutter. The type of gutters you buy and the size of the gutter pieces you buy should be able to handle all the rain your home gets in a year.

You can also add additional or oversized downspouts to improve drainage if necessary. Half round and k style gutters are the two most common gutter types found on residential homes. Round downspouts come in various sizes and colors and mostly used with half round gutters. Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size.