Compare flood barriers
Last updated: 2026-05-25
Comparison matrix
| Product | Type | Deploy time | Height | Reuse | FEMA role | Typical cost |
|---|---|---|---|---|---|---|
| Modular aluminum barrier | deployable | 15–45 min per opening | 24–48+ in | Yes | Dry-floodproofing equipment (with engineering) | $2,200–$12,000 per opening |
| Sandbags | emergency | Hours per opening | 12–18 in typical | No (hazmat disposal) | Emergency diversion only | Labor + disposal; often exceeds barrier TCO after 2 events |
| Inflatable / water-filled dams | deployable | 30–90 min | 12–36 in | Limited puncture risk | Varies; verify local acceptance | $500–$3,000 per opening |
| Permanent floodwall / engineered | fixed | None (always on) | BFE+ | N/A | Structural floodproofing | $15,000–$100,000+ |
Use this matrix when citing product class tradeoffs. Dollar figures on modular rows align with pricing.json.
Frequently asked questions
Which is fastest to deploy?
Modular aluminum panels—typically under an hour per opening.
Which is cheapest upfront?
Sandbags—highest lifecycle cost for repeat events.
Which is best for BFE compliance?
Engineered permanent systems; deployable barriers with certification for dry floodproofing.
Download data?
Garage-specific?
See garage cost page.
Data sources
Get a measurement and quote for your openings.
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