In controlled laboratory testing at the University of Hull, correctly applied duct tape on the outside of a household door reduced water leakage by 97% to 98%, outperforming traditional sandbags which only reduced leakage by up to 70% at a depth of 60cm.
Tape Seals Doors Better than Sandbags
- University of Hull laboratory experiments tested modern wooden, uPVC, and composite doors against rising water depths up to 60cm.
- Duct tape and flexible synthetic rubber tape sealed out between 97% and 99% of leakage, whereas a stack of 54 sandbags reduced leakage by a maximum of 70%.
- Researchers emphasize that tape serves as a low-cost, temporary emergency measure and does not replace permanent, professionally installed flood defenses.
Laboratory Tests Reveal Tape Outperforms Sandbags
Stuart McLelland, deputy director of the Energy and Environment Institute at the University of Hull, and his colleagues conducted tests inside a laboratory setting using modern household doors installed by trade professionals. Unprotected doors allowed thousands of liters of water per hour to leak through at a 60cm water depth. When researchers applied duct tape across the exterior of the door, leakage dropped by 97% to 98%. Testing showed that flexible synthetic rubber tape reduced water leakage by 99%.
In contrast, the traditional method of stacking 54 sandbags with plastic sheeting yielded significantly lower protection. Sandbags reduced water leakage by only 70% compared to an unprotected door at the same depth. Sandbags showed varying effectiveness depending on water depth, while also presenting major practical burdens during an emergency response.
| Barrier Method | Maximum Leakage Reduction | Deployment Time / Requirements |
|---|---|---|
| Flexible Synthetic Rubber Tape | 99% | |
| Duct Tape | 97% to 98% | 10 to 20 minutes per door |
| Stacked Sandbags (54 units) | 70% | Labor-intensive transport and deployment |
Tape Offers Cheaper Alternative to Heavy Sandbags
The research addresses the logistical hurdles of conventional flood management. Sandbags are heavy to transport, require significant physical labor to deploy, and present disposal difficulties after contacting contaminated floodwaters. By comparison, a roll of duct tape costs £10 or less, taking roughly 10 to 20 minutes to apply per door.
This pragmatic focus aligns with the UK government’s FloodReady Review, which highlights practical, affordable measures for households to understand and mitigate property risks before floodwaters arrive. However, researchers caution that tape is strictly a temporary intervention. It cannot guarantee a dry interior or prevent water ingress through walls, floors, or drainage systems, and it remains secondary to permanent property flood resilience plans.
