How to Get Rainwater to Flow Away From Your House

Save

Rainwater and a home’s foundation don’t make a compatible marriage. Unless its path is diverted, the rain that runs off a roof forms a vertical sheet of water that falls around the perimeter of a house. As the water collects around a home’s foundation, the soil can only absorb so much before excess water finds a path of least resistance. To prevent water damage, engineer the rainwater's path to flow away from your house.

Roof Guttering

  • A guttering system that you install on your home’s roof serves as a perimeter catch basin that collects rainwater. Downspouts channel the collected water from the roof to the ground at the corners of the house and other locations. Guttering systems are effective in moving rainwater away from your house only if you divert the water that comes out of the downspouts. Otherwise, the downspouts deposit the collected rainwater at your home’s foundation. Typically, splash blocks that you place underneath the downspouts are too short to move water far enough away from a home’s foundation. A better choice is to attach a downspout extender or a flexible corrugated pipe to the downspout terminal that is at least 5 feet long.

Foundation Grading

  • Grading the soil away from your house helps carry rainwater away from its foundation. The slope’s effectiveness depends on the percentage of the grade and the soil’s permeability. As a minimum, the slope should extend 10 feet from the foundation and drop 6 inches, which results in a 5 percent grade. Soils with low permeability, such as clay, typically do not absorb water quickly and are more apt to allow rainwater to flow down a graded slope. Sandy soils that have higher permeability absorb rain water easily. With sandy soil a 10 percent grade is recommended.

Foundation Plantings

  • Foundation plantings gained popularity around older homes as a way to block the view of their unsightly foundations. This practice is no longer recommended because of how the plants hold water around a home and compromise the integrity of its foundation. Instead, entry gardens are favored as a way to complement a home’s design. Remove foundation plantings and replant them -- or replace them with new plants -- beyond the roof’s drip line, ideally at least 5 feet from the foundation.

Extra Precautions

  • Even if you heed other recommendations for diverting rainwater away from your house, persistent moisture problems may require additional measures to protect the foundation. Drain tile collects rainwater that would otherwise puddle around the foundation and channels it into a sump. The sump is a hole that holds up to 25 gallons of water. Inside the sump is a pump that turns on automatically when the water rises above a certain level. The sump pump moves the water into a pipe, which channels the water away from the house.

References

  • Photo Credit Paffy69/iStock/Getty Images
Promoted By Zergnet

Comments

You May Also Like

  • Water Around Foundation Problems

    Water can cause severe problems to a house's or structure's foundation. Water damage and leaks caused by surface water is easily repairable;...

  • How to Divert Spring Water

    Living near natural springs has both advantages and disadvantages. The water can be used for your plants, washing clothes and other household...

  • How to Divert a Natural Water Spring

    Collections of natural spring water in your yard can give the family dog a place to cool off on a hot day,...

  • How Effective Is a French Drain?

    French drains are perforated pipes laid in a gravel bed, usually intended to shunt water away from house foundations. When properly installed,...

  • Alternate Ways to Divert Roof Rain Water

    Water is the most precious resource on our planet, and it is becoming increasingly scarce. With our growing world population, the need...

  • How to Drain From the Gutter to the Yard

    The water from your gutter downspout should drain away from the home to prevent water from seeping into your foundation, but a...

  • Downspout Drainage Options

    There are a variety of options for handling water drainage from downspouts. The best option depends on the location of the home,...

  • DIY Basement Trough System to Divert Water

    A do-it-yourself trough system to divert water from the basement can prevent costly damage to your residence. Often water enters a basement...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!