Flood Prevention Using Gutter Extensions and Downspouts
A downspout is a water pipe which carries rainfall away from from a rain gutter and away from a house for flood prevention.
Downspouts are generally vertical and typically prolong to ground level. The water is routed far from the structure’s structure, to shield the structures from water damage. The water is typically piped to a drain, or allow right into the ground through seepage.
One inch of rainfall can drop 623 gallons of water onto the roof of a 1,000-square-foot home – and through the gutter downspouts. The water can cause serious and expensive flooding and foundation problems if it collects around your house. Here are several relatively simple solutions for poor downspout drainage, including straight and flexible extensions and various underground piping plans.
Add Downspout Extenders
If you have well-drained soil sloping away from the foundation, simple downspout extenders may be all you need to improve downspout drainage. Consider a straight, folding vinyl extension. Another option is the accordion-style flexible extender. These extenders can be twisted into any angle to move the downflow away from a patio, for example.
Either extension should end on a splashblock. Some experts don’t give much credence to plastic or cement splashblocks. They may not be the perfect solution for downspout drainage issues, but splashblocks at least spread water so it doesn’t pool directly under a narrow downspout.
More Flood Prevention: Pipe Water Away from House
To divert water farther from the house, consider a French drain or other trench drainage system. A French drain (named after American drainage expert Henry French, not the country) is a trench that slopes away from the house at least ¼-inch per foot and empties onto open ground far from the house. Fill the bottom of the trench with gravel, then lay in a flexible or solid pipe and cover with more gravel and soil or sod. The original French drains had no pipe, and you can make a hybrid system with a porous pipe.
Read more about flood prevention at: http://www.networx.com/article/how-to-improve-downspout-drainage