Designing Gutter Downspout System

The above sizing is reflected in the development of figure 4 downspout outlet sizing leader pipe sizing.

Designing gutter downspout system.

How to design a gutter downspout system step 1. Draw a map of your roof on a piece of paper. When installing a gutter downspout drainage system be sure to avoid some of the common mistakes made. Some soil absorbs and drains the water very well so a downspout that diverts water just a few inches away from your home.

A 6 inch top width k style gutter can receive a 3 x 4 downspout. On the 80 foot long roof assume two down spouts on each side. The issue is soil. 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.

Remember a gutter downspout system is a containment sy. 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. A 4 x 5 downspout can also fit but again some trimming of the flange of the preformed downspout outlet may be required. Usually your gutter contractor will decide between 5 inch gutters with 2 by 3 inch downspouts or.

Cross off any edge that isn t at the bottom of a slope. A little water will fall off these edges but not enough. Once all the parts of the drainage system were installed we covered the tubes with several inches of rock. The maximum accumulation of rainfall occurs when it falls perpendicular to the roof plane.

Design area for pitched roofs. An amateur may only consider the length of the roof s edge when planning a gutter installation. That line eventually emptied into the low spot in the back yard. The map needs to be as close to scale as possible.

The roof area to be drained is a key factor in designing gutters and downspouts. The standard is about inch per 10 feet. Featuring durable vinyl construction this extension can be buried bent or connected to additional sections. Increasing the pitch increases a gutter s.

Get 7 or 8 inch gutters. Increase the pitch of the gutter. Use the factor of 1 05 from table 2 to adjust the roof plan area for the 4 12 roof pitch. 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.

They ll cost more and probably require a custom order through a professional installer. The above recommendations. You have three options. You can use your.

Some downspouts simply can t move the water far enough away from your house on their own. The area of roof contributing runoff to each gutter and downspout should be determined.