Designing Gutter Downspout System

The area of roof contributing runoff to each gutter and downspout should be determined.

Designing gutter downspout system.

Cross off any edge that isn t at the bottom of a slope. Increase the pitch of the gutter. Gutters and downspouts do a great job of handling water run off from the roof but you also need to think about how your downspout drainage system is performing. Design a gutter downspout system for a 40 by 80 foot free stall barn located near folsom la with a 4 12 gable roof.

On the 80 foot long roof assume two down spouts on each side. The roof area to be drained is a key factor in designing gutters and downspouts. A 4 x 5 downspout can also fit but again some trimming of the flange of the preformed downspout outlet may be required. The standard is about inch per 10 feet.

When installing a gutter downspout drainage system be sure to avoid some of the common mistakes made. Featuring durable vinyl construction this extension can be buried bent or connected to additional sections. The above recommendations. Some soil absorbs and drains the water very well so a downspout that diverts water just a few inches away from your home.

Use the factor of 1 05 from table 2 to adjust the roof plan area for the 4 12 roof pitch. How to design a gutter downspout system step 1. Once all the parts of the drainage system were installed we covered the tubes with several inches of rock. The amerimax home products flex a spout downspout extension has the amerimax home products flex a spout downspout extension has a rigid corrugated design for versatility.

You can use your. Increasing the pitch increases a gutter s. An amateur may only consider the length of the roof s edge when planning a gutter installation. Where the tube passes by the downspout from the gutter we installed a y fitting and drained the roof water from the gutter system directly into the main drainage line.

Remember a gutter downspout system is a containment sy. They ll cost more and probably require a custom order through a professional installer. Design area for pitched roofs. You have three options.

The above sizing is reflected in the development of figure 4 downspout outlet sizing leader pipe sizing. That line eventually emptied into the low spot in the back yard. Draw a map of your roof on a piece of paper. The map needs to be as close to scale as possible.

A little water will fall off these edges but not enough. The issue is soil. The maximum accumulation of rainfall occurs when it falls perpendicular to the roof plane. How to design an effective gutter system 3 factors to consider.

Get 7 or 8 inch gutters. A 6 inch top width k style gutter can receive a 3 x 4 downspout.