Skip to main content

Site Drainage Practices to Minimize Localized Flooding

Description

Localized flooding or pooling around the foundation of a house can occur during heavy rains if the site is not designed for adequate drainage (Figure 1). This can lead to many homeowner headaches – wet, muddy, or icy conditions along entryways to the home; water entry into the home; and mold, mildew, and rot in building components. Standing water and constantly damp conditions can also attract insects and rodents.

Poor drainage conditions can enable water to pool around the home.
Figure 1. Poor drainage conditions can enable water to pool around the home (Source: Steve Easley & Associates).

 

There are several steps that builders can take to reduce the likelihood of standing water and localized flooding around the home during rainy conditions. These actions are described in the following guides:

Gutters and Downspouts

Final Grade Slopes Away from Foundation

Patio Slabs, Porch Slabs, Walkways, and Driveways Slope Away from House

Swales, Drains, and Site Grading for Stormwater Control

Footing Drain Pipe

Drain or Sump Pump Installed in Basements or Crawlspaces

Capillary Break Beneath Slab - Polyethylene Sheeting or Rigid Insulation

Damp-Proof Exterior Surface of Below-Grade Walls

 

The above guides are helpful for new and existing homes. Here is additional guidance specific to existing homes with basements and crawlspaces that are experiencing water intrusion issues.

Water Management of Existing Basement Floor

Water Management of Existing Crawlspace Floor

Contributors to this Guide

The following authors and organizations contributed to the content in this Guide.

Last Updated

Mobile Field Kit

The Building America Field Kit allows you to save items to your profile for review or use on-site.

Sign Up  or  Log In

Did you find this information helpful?

If you have questions and/or would like a reply to this feedback, please include your e-mail address in the message.
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.