How the material counts are produced
Water usually gets in through doorways and low windows. Enter how many openings you want to protect and how wide each one is, then the span a single flood panel or sandbag covers, and the counts come out rounded up, because you cannot buy part of a panel. Sandbags are handled in two steps: the bags needed to fill one row are rounded up first, then multiplied by the rows you plan to stack.
Take the coverage span from your product manual. There is no published standard for that figure, so this page offers no recommended value of its own โ widely repeated numbers are habit rather than product specification. Written as of October 2026.
This page counts quantities and protected span only. It does not cover what to do while water is rising, when to leave, or how to handle electricity and gas. Follow guidance from the US Federal Emergency Management Agency and the National Fire Protection Association, and talk to the manufacturer about permanently installed barriers.
Frequently Asked Questions
No. Coverage differs by product, so this page publishes no recommended quantity. Enter the coverage span printed in your product manual and the count is derived from that value alone.
The bags needed to fill one row are rounded up first, then multiplied by the number of rows you plan to stack, because a row cannot be filled with part of a bag. Both figures are shown separately.
This page gives no response steps. Follow guidance from the US Federal Emergency Management Agency and the National Fire Protection Association. Use the results only to count supplies to keep on hand.