---
title: "What Is Ponding Water? | Calibre Glossary"
description: "Ponding water is water that remains on a roof surface for 48 hours or longer after rainfall, often because of low spots, poor drainage or deflection of the."
url: https://calibre.multisites.ai/glossary/ponding-water
publisher: Calibre Commercial Inspections
phone: "+1-208-305-6245"
email: Schedule@CalibreCBI.com
---

Building systems

# Ponding Water

Ponding water is water that remains on a roof surface for 48 hours or longer after rainfall, often because of low spots, poor drainage or deflection of the roof structure.

## Why it matters

Standing water adds weight, speeds membrane aging and can void roof warranties. Inspectors note ponding on low-slope roofs and look for causes such as clogged drains or sagging decks. Fixes range from drain cleaning to tapered insulation.

Source: [asphaltroofing.org](https://www.asphaltroofing.org/ponding-water-basics/)

## Where we discuss it

-   [How We Found Hidden Water Intrusion on a Commercial Roof (When the Ceiling Showed Nothing)](https://calibre.multisites.ai/cre-inspector-insights/how-we-found-hidden-water-intrusion-on-a-commercial-roof-when-the-ceiling-showed-nothing)

## Ready for your next inspection?

Tell us about the property and your timeline. We will scope the right report and send a proposal.

[Request a proposal](https://calibre.multisites.ai/request-proposal) [(208) 305-6245](tel:+12083056245)