Comparison
Flood panels vs sandbags, flood doors and inflatable barriers
What actually keeps water out, how fast each goes up, and what it costs over the years.
What is the best way to keep floodwater out of a house?
| Sandbags | Aluminum flood panels | Permanent flood doors | Inflatable / water-filled | |
|---|---|---|---|---|
| How well it seals | Leaks between and under bags | Watertight when installed and compressed | Watertight | Varies; can shift or puncture |
| Time to deploy | Hours, needs a crew | Minutes per opening, one person | None (always in place) | 30+ minutes; may need water or air |
| Reusable | No; contaminated after a flood | Yes, many years | Yes | Usually |
| Looks | Not applicable (temporary) | Slim tracks, paintable; panels stored away | Changes the door itself | Stored away |
| Up-front cost | Lowest | Moderate | Highest per opening | Low to moderate |
| Best for | Last-minute emergencies | Homes, condos and businesses that flood repeatedly | Commercial doors used daily in high-risk zones | Temporary or perimeter use |
When each one makes sense
Sandbags are better than nothing if a storm is hours away and you have no other protection. Plan to throw them away afterwards.
Aluminum flood panels, like the Flood Guard system, are made for properties that will face storm after storm. The tracks stay on the wall; the panels are stored until needed.
Flood doors replace the door itself and are always ready, which suits commercial entrances in daily use, at a much higher price per opening.
Inflatable or water-filled barriers can work as temporary walls on flat ground but can shift, puncture or leak where they meet the building.
Whatever you choose
Protect every opening below the water level you're planning for. One unprotected slider or garage defeats the rest. Read 5 flood protection mistakes.
Questions people ask us
Are flood panels better than sandbags?
For a property that will see more than one storm, yes. Sandbags slow water but leak, take hours to place and must be thrown out after a flood. Aluminum flood panels seal with compressed rubber gaskets, go up in minutes and are reused for years.
How many sandbags does it take to protect a door?
Even a single door typically takes dozens of bags stacked in an overlapping pattern for a low barrier, and each filled bag weighs around 35 to 40 pounds. That's why sandbagging a whole house is so slow.
Are flood doors worth it?
Permanent flood doors make sense for some commercial entrances in high-risk areas that are used daily. For most homes, removable panels give the same protection for much less, and don't change how your doors look or work.
Find out what protecting your property costs
Free on-site assessment and a written quote. Most homes come in around $5,000–$8,000, less than 10% of the cost of flood repairs.