Home Weather Prep
Gutter and Downspout Heavy Rain Guide: Keep Water Away From the Foundation
How gutters, downspouts, grading, drains, and splash blocks affect basement flooding and foundation water during heavy rain.
Quick answer: Gutters and downspouts help move roof water away from the foundation, but they only work if they are clear, connected, and draining to the right place.
Before heavy rain
Clear leaves and debris, check seams, and make sure downspouts are attached.
Extend downspouts away from the foundation where local rules and drainage allow.
Common mistakes
Short downspouts can dump water beside the basement wall. Clogged gutters can overflow near doors, windows, and foundation cracks.
Poor yard grading can send water back toward the house.
When to get help
Repeated basement water, soil erosion, sagging gutters, or standing water near the foundation may need professional drainage advice.
Do not ignore small leaks that appear only during heavy rain.