Roof Gutter Sizes

To limit the effects of thermal expansion in gutters 50 ft.

Roof gutter sizes.

6 inch 7 960 square feet. Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size. Downspout sizes must not exceed the bottom width of the gutter. There are two main common sizes of gutters and one of them is 5 inch.

However too large a gutter downspout can look unattractive. Most downspouts are rectangular but they can also be round or square. For most homes this will be a large enough gutter to handle the amount of water washing off of the roof but if you live in a particularly rainy area you will want to opt for wider downspouts to be installed with your new gutters. Gutters come in different sizes.

You should have enough gutter downspouts to effectively handle the size of your entire gutter system. 5 types of rain gutters to consider for your home find out if your home needs rain gutters and which materials are the most durable diy friendly and cost effective. They can be 4 5 or 6 inches. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

There are two most common type of residential gutters that we will talk about in this post for reliable roof gutter sizing. 5 inch 5 520 square feet. Five inch k style gutters six inch half round. The capacity of a sloped rectangular gutter may be approximated by using a gutter cross section area not less than that of a semicircular gutter and a depth to width ratio of at least 0 75.

Then use the chart below to see what size gutter you need. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. W is the width in in. 15 m is a practical maximum gutter length to be served by a downspout.

Half round 5 inch 2 500 square feet 6 inch 3 840 square feet. The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website. 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. I denotes rainfall intensity the roof area in square feet sq m.

Gutter downspout sizes are 3 to 6 inches.