Roof Gutter Sizes

Then use the chart below to see what size gutter you need.

Roof gutter sizes.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Half round 5 inch 2 500 square feet 6 inch 3 840 square feet. To limit the effects of thermal expansion in gutters 50 ft. However too large a gutter downspout can look unattractive.

W is the width in in. You should have enough gutter downspouts to effectively handle the size of your entire gutter system. Gutters come in different sizes. Five inch k style gutters six inch half round.

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. Half round gutter sizing is based on w 0 0182 la 2 5. 5 inch 5 520 square feet. This is most common in the k style gutters.

They can be 4 5 or 6 inches. Most downspouts are rectangular but they can also be round or square. Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size. The larger a gutter downspout the more water it can drain quickly.

If a roof s various drainage areas call for different size gutters go for the biggest one k style. Downspout sizes must not exceed the bottom width of the gutter. 15 m is a practical maximum gutter length to be served by a downspout. There are two most common type of residential gutters that we will talk about in this post for reliable roof gutter sizing.

6 inch 7 960 square feet. The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website. 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. I denotes rainfall intensity the roof area in square feet sq m.

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.