Typical Residential Gutter Size

But houses with big steep roofs or those located in climates prone to heavy downpours may need wider gutters and extra downspouts to keep.

Typical residential gutter size.

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. A standard 5 inch k style gutter can handle annual rainfall for a majority of houses in most of the u s. Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size. 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.

This type of down spout is considered the standard downspout style in households and is used with a 5 k style guttering system. Most residential gutter systems use 5 gutters or 6 gutters. It also comes in sizes 2 3 and. 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.

Downspout sizes must not exceed the bottom width of the gutter. 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. How to size gutters downspouts. You can also add additional or oversized downspouts to improve drainage if necessary.

Outlet sizing and spacing your gutter system will perform its best when a proper outlet size is chosen to drain a given roof area. The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website. 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. Round downspouts come in various sizes and colors and mostly used with half round gutters.

If a roof s various drainage areas call for different size gutters go for the biggest one k style. Half round and k style gutters are the two most common gutter types found on residential homes. A larger size gutter system will generally be more expensive. 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. They can be 4 5 or 6 inches. Each gutter style comes in two sizes and each has the capacity to. 5 inch 5 520 square feet.