Standard Commercial Gutter Sizes

The extra run off requires the larger six inch size gutter.

Standard commercial gutter sizes.

But by contrast going to 7 inch gutters is a business decision. By reducing the downspout spacing to perhaps 35lf you could use a 6 gutter with 9 4 x6 downspouts in lieu of an 8 system. K style sizes will typically range from 5 to 6. Thus the decision between 5 inch and 6 inch gutters is a performance and price decision.

Offering a 7 inch option is tantamount to entering the commercial gutter market. As a general rule egutter recommends for roof areas that exceed 2800 square feet a 6 k style size with a 3 x 4 downspout size would be appropriate. Most downspouts are rectangular but they can also be round or square. However too large a gutter downspout can look unattractive.

The five inch size is most frequently used in residential applications. Available in 10 lengths. Both kortyta and grambart put 7 inch gutters in an entirely different category than 5 inch and 6 inch systems. 7 and greater are appropriate for churches and larger commercial buildings.

You should have enough gutter downspouts to effectively handle the size of your entire gutter system. Gutter downspout sizes are 3 to 6 inches. Gutter style gutters are typically k style and half round styles though custom profile are available. It is easy to see that you can vary gutter size downspout size and downspout spacing to properly size a gutter downspout system.

Gutters can be manufactured in a variety of sizes but commonly come in five inch and six inch widths. Commercial buildings are normally larger with a larger roof area.