Designing Gutter Downspout System

Use the factor of 1 05 from table 2 to adjust the roof plan area for the 4 12 roof pitch.

Designing gutter downspout system. They ll cost more and probably require a custom order through a professional installer. Draw a map of your roof on a piece of paper. Assume a level rectangular gutter with a depth to width ratio of 0 75. Usually your gutter contractor will decide between 5 inch gutters with 2 by 3 inch downspouts or.

A little water will fall off these edges but not enough. Design a gutter downspout system for a 40 by 80 foot free stall barn located near folsom la with a 4 12 gable roof. The area of roof contributing runoff to each gutter and downspout should be determined. A 6 inch top width k style gutter can receive a 3 x 4 downspout.

The map needs to be as close to scale as possible. Design area for pitched roofs. That line eventually emptied into the low spot in the back yard. Some soil absorbs and drains the water very well so a downspout that diverts water just a few inches away from your home.

The above sizing is reflected in the development of figure 4 downspout outlet sizing leader pipe sizing. Remember a gutter downspout system is a containment sy. 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. 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.

Once all the parts of the drainage system were installed we covered the tubes with several inches of rock. On the 80 foot long roof assume two down spouts on each side. When installing a gutter downspout drainage system be sure to avoid some of the common mistakes made. Get 7 or 8 inch gutters.

How to design a gutter downspout system step 1. The standard is about inch per 10 feet. The issue is soil. An amateur may only consider the length of the roof s edge when planning a gutter installation.

You have three options. 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. Increasing the pitch increases a gutter s. A 4 x 5 downspout can also fit but again some trimming of the flange of the preformed downspout outlet may be required.

You can use your. How to design an effective gutter system 3 factors to consider. Cross off any edge that isn t at the bottom of a slope. Increase the pitch of the gutter.

The above recommendations. The maximum accumulation of rainfall occurs when it falls perpendicular to the roof plane.