K Style Gutter Sizing Chart

5 inch 5 520 square feet.

K style gutter sizing chart.

The size of the downspout should be constant through out its length. Gutter style gutters are typically k style and half round styles though custom profile are available. The above sizing is reflected in the development of figure 4 downspout outlet sizing leader pipe sizing. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

Offset of more than 10 ft 3 0 m can affect drainage capacity. Gutter style gutters are typically k style and half round styles though custom profile are available. Downspouts should be constructed with conductor heads every 40 ft 12 2 m to admit air and prevent vacuum. See rainfall data pdf for charts a and charts b that following along with this gutter sizing pdf.

A 4 x 5 downspout can also fit but again some trimming of the flange of the preformed downspout outlet may be required. Measure your gutter across the top from the back where the gutter meets the home to the outer edge. 5 inch standard k style gutter shop 5 gutterbrush. K style sizes will typically range from 5 to 6.

Gutter professionals have experience matching the gutters and the downspouts. 7 and greater are appropriate for churches and larger commercial buildings. 7 and greater are appropriate for churches and larger commercial buildings. Then use the chart below to see what size gutter you need.

As far as downspouts go they run at 2 x3 and 3 x4 in size or 3 or 4 inches in diameter. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. An example is illustrated using a project in buffalo n y. K style gutters have the capacity to move either 5 520 square feet for 5 inch gutters or 7 960 square feet for 6 inch.

Rules to follow when sizing outlets sloping gutter style considerations and maximum lengths without expansion brackets. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Compare the adjusted square footage to the two most common gutter types. The gutter outlet capacity should suit the downspout capacity.

See chart i 2 pdf to follow along with the samle problem. For example a 6 inch k style gutter requires a 3 x 4 downspout while a 5 inch k style gutter uses a 2 x 3 downspout. To prevent mosquitoes your gutter system must not hold rainwater.