A standard gutter drainage solution is to divert water to a storm drain in your yard or create what is called a “
The gutters are attached directly to the fascia and channel water to the downspouts. The downspouts direct and release the water to ground level and away from your home. The gutters and downspouts are attached through various connectors to form a unified channel.
The most common way to get runoff away from your lawn and underneath your yard is by constructing a French drain. A French drain is actually a network of pipes laid in trenches dug beneath the ground through which water runoff can flow.
In some cases, this means leading the water into a nearby storm drain or dry well. But in other cases, like those with a particularly sandy or clay-rich soil composition, homeowners may choose to have their downspouts go directly into the ground.
The cardinal rules for downspout placement suggest that they should be located at every corner of the house and approximately every 20 to 30 feet along the gutter line.
The general rule is that there needs to be a downspout for every 40 feet of the gutter.
Gutters and gullies should only collect rainwater and connect to the rainwater drain. Wastewater pipes should not be connected to the rainwater system. If the rainwater gutters and gullies are connected to the wastewater drain, rainwater could overwhelm the drain and cause flooding.
As mentioned above, the water should be diverted at least 4 to 6 feet away from the house. If a home has basement walls, it should be at least 6 feet away. The furthest away from the foundation the better. Putting gravel or rocks at the end of the downspout to avoid erosion is a great idea.
If the downspout is over a grassy area, planter box, or other natural soil, it can potentially discharge the water there. However, over paved areas, it's compulsory to route that downspout underground. If there is free flow of water from a downspout onto a paved area, it's certain to damage that area.
Depending on local regulations, a gutter usually discharges, as a nonpoint pollution source in a storm drain whose final discharge falls into a detention pond (in order to remove some pollutants by sedimentation) or into a body of water.
Street gutters carry water to storm drains that let water fall beneath the street. The grates on storm drains stop large objects (and people!) from falling in. An underground pipe carries water out of a city or town. The water pours into a large waterway— a lake, river, or sea.
Redirecting roof runoff is as simple as adding a downspout extension. These are plastic (PVC) or metal extensions that attach to the bottom of your existing downspout. The extension should carry your roof runoff at least three to five feet away from your home to prevent any water damage to your home or foundation.
However, there are some common issues caused by buried downspouts that homeowners should be aware of. One of the most common problems with buried downspouts is clogging. Over time, debris such as leaves, dirt, and twigs can accumulate in the pipe, leading to blockages.
While some small amount of standing water can be normal, it should be no more than what would dry up after only a few hours in the sun. Anything more than a quarter of an inch of standing water in small spots can lead to algae growth and water damage.
To ensure proper coverage and protection, bury your downspout extension at least 12 inches deep.
No, there should not be any water leaking between the gutter and fascia. If there is water present, it could indicate faulty installation or worn-out seals. Check for rust, weathering, or loose screws in the gutter hanger system and repair or replace parts if necessary.
Drains and gullies collect the surface water and this then either flows into a soakaway (whereby the water is taken away from the house, into a septic tank and distributed where it can soak into the gravel and soil), or in many cases, straight into a public sewer system.
Clogged Gutters and Downspouts
Debris traps the water, causing the gutters to overflow. This can become a hazard, because the water may seep into the walls and ceilings. To solve this issue, you can have mesh screens installed over your gutters that can prevent leaves, dirt, and other debris from falling into them.
Your new gutters should be installed at a certain angle to ensure rainwater is diverted to the drains. As a rule of thumb, gutters should have a slope of 1/4 inch for every 10 feet.
Calculating Downspouts Based on Gutter Length
The general rule of thumb is one downspout for every 20-30 feet of gutter. This may vary depending on several factors such as the pitch of your roof, the volume of rainfall in your area, and the capacity of your gutters.
Reduces Flooding Risk
During heavy rainstorms, excess water can overwhelm above-ground downspouts and lead to flooding around your home's foundation. Buried downspouts help to alleviate this risk by providing a more efficient drainage system.
An underground drainage pipe is often built as trenches and attached to the downspout (or wherever the water issue is coming from), and then they take water around the yard. If you build an underground pipe through a trench, you can redirect the water via the drainage system to any area of the yard you like.
This is to prevent saturated ground and potential flooding or damage to the building's structure over time. Instead, downpipes should outlet into surface water drains or soakaways, which allow rainwater to gradually soak into the ground safely. Directing downpipes straight into underground drains can overload them.
In many cities, rain flows into storm sewers, beginning an underground journey, down the drain and to the stream. So, be careful, since anything you put in your yard, street or storm drain will flow directly to a river or lake in your community.