Gutter Downspout Measurements

Using a ladder will save you time with these measurements.

Gutter downspout measurements.

How to measure downspouts. You can use the same method to calculate the downspouts on your gutter system. You should have enough gutter downspouts to effectively handle the size of your entire gutter system. The larger a gutter downspout the more water it can drain quickly.

Use the downspout to redirect runoff and help prevent garden erosion and foundation damage. Use the chart below to figure out how many extra downspouts you need. Then use the chart below to see what size gutter you need. Step 3 understand that it takes 96 15 square feet of surface with 1 inch per hour of rainfall to correspond with 1 gpm of flow rate.

Most downspouts are rectangular but they can also be round or square. Use that figure to calculate what size downspouts are needed for your roof. In sizing downspouts the following considerations apply. The second most common style of downspouts in urban homes is the rectangular downspout coming under a range of sizes such as 2 3 3 4 and 4 5.

Downspouts of less than 7 00 sq in 4515 sq mm cross section should not be used except for small areas such as porches and canopies. Metal or vinyl downspouts this versatile downspout has a lifetime guarantee. As with gutters a downspout s capacity must match or exceed the expected runoff. The twine can be taped to bends and elbows as you move down towards the ground to provide you with an idea of the extra length needed at these points.

Downspouts are sized in relation to rainfall on this basis. Gutter professionals have experience matching the gutters and the downspouts. The above recommendations assume that you have properly sized downspouts every 40 feet. Now that we are well aware of the various gutter downspout sizes and styles let us dig deeper into the materials used for effective downspouts and how much they shall cost.

Downspouts should be constructed with conductor. As far as downspouts go they run at 2 x3 and 3 x4 in size or 3 or 4 inches in diameter. The size of the downspout should be constant through out its length. Gutter downspout sizes are 3 to 6 inches.

Compatible with 2 in. 5 inch 5 520 square feet. This durable downspout is maintenance free and has uv stabilizers to help prevent uv light degradation. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

6 inch 7 960 square feet. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. However too large a gutter downspout can look unattractive.