Roof Gutter Downspout Design

Factors to be considered in the design of roof drainage sys tems are the area to be drained size of gutters downspouts outlets slope of roof type of building and appearance.

Roof gutter downspout design.

Design area wizard smacna s new downspout and gutter sizing calculator enables the user to manually enter the design area of the roof or use the design area wizard for the calculation. Connects the gutter to the downspout. The area of roof contributing runoff to each gutter and downspout should be determined. The lowest roof area in elevation should include the area of roofs above that drain onto it.

It has an angled outer wall that directs the flow of water into gutter sections. As a safety factor always design or select gutters and downspouts for worst case conditions. Roof area to be considered the design capacity for a roof drainage system depends on the quantity of water to be handled. The maximum accumulation of rainfall occurs when it falls perpendicular to the roof plane.

Gutters will end where the roof no longer slopes downward. Featuring durable vinyl construction this extension can be buried bent or connected to additional sections. See more ideas about downspout gutter gutters. The flows and capacities of the roof gutter and downspouts shown in this design guide are based on actual measurements taken from some of the materials available.

For practical purposes the roof gutter depths and areas used are assumed to hold true for all available gutter of a given style top width and material even though differences do occur. Has two adjoining gutters cut on 45. Without a gutter system water will simply fall off the roof and likely form pools near the base of your house. Five inch k style gutters or 6 inch half rounds the most common residential sizes are able to handle the rainfall on most houses in most parts of the country.

Connects troughs to keep the water flow off the roof and away from the property. The end part that closes the gutter so that water or stray debris won t flow out. The roof area to be drained is a key factor in designing gutters and downspouts. The amerimax flex a spout downspout extension has a rigid the amerimax flex a spout downspout extension has a rigid corrugated design for versatility.

But houses with big steep roofs or those located in climates prone to heavy downpours may need wider gutters and extra downspouts to keep rainwater from overflowing.