The University of Hull (UK) has published research evaluating the effectiveness of simple measures to protect residential properties from water leaks during floods. The key finding: sealing gaps in doorways with tape reduces incoming water volume by 97–98%, which proved more effective than using sandbags in the same experiment.
Testing Methodology
During the tests, researchers simulated a scenario with a maximum water level of 60 cm. Without any protection, wood, PVC, and composite doors allowed thousands of liters of water per hour to pass through. After sealing the gaps, this volume dropped dramatically, and treating a single door took about 10–20 minutes. Tests were conducted in a specialized water flume facility equipped with water dynamics recording equipment—the laboratory photo shows the corresponding testing rig with a monitoring display and a suspended weight.
Comparison with Sandbags
In a control experiment, researchers used 54 stacked sandbags with a plastic sheet placed between them and the door. This barrier reduced leakage by a maximum of 70%, while its setup required significant time and physical effort. According to the same study, tape proved to be both more effective and faster to apply.
Method Limitations
The research team emphasizes that tape is a temporary, inexpensive, and simple solution that does not replace flood gates or specialized flood defense systems. The method also does not prevent water seepage through walls, floors, and drainage systems. Actual effectiveness depends on the condition of the door, door frame, and the quality of the tape used.
Practical Significance
The results can be useful for homeowners in at-risk areas who need a quick and cheap first-aid measure under the threat of flooding. However, the study authors do not recommend relying on tape as the sole barrier: in comprehensive flood protection, it serves as an auxiliary rather than a primary tool.
