Residents across South East Queensland are deep in preparations ahead of Cyclone Alfred’s forecasted land crossing on Thursday.
For many, it means visiting Council’s sandbag sites and loading up. Brisbane City Council ran out of sandbags at all depots yesterday after distributing 74,000 bags. Today, additional ‘fill your own’ sites have been announced. More on that here.
Importantly, how you lay your sandbags matter. If you live in a flood prone zone or are expecting lots of water this week, it’s best to be prepared.
1. Get the Right Sandbags
Not all sandbags are created equal. Use hessian (burlap) or woven polypropylene sandbags, as they are durable and can withstand water pressure. Each sandbag should be filled two-thirds full with sand or soil, allowing flexibility when stacking and creating a more effective barrier.
2. Prepare the Area
Before placing sandbags, clear debris and level the ground where they will be stacked. For enhanced protection, lay down a heavy-duty plastic sheet along doorways and entry points before adding sandbags. This adds an extra layer of waterproofing and helps prevent water seepage.
3. Stack Sandbags Correctly
To ensure maximum effectiveness:
- Use a staggered brickwork pattern when stacking, similar to laying bricks.
- Tuck the open end under the next bag to prevent water from seeping through gaps.
- Compact each layer by pressing down gently to remove spaces between the bags.
4. Build a Strong Barrier
For minor flooding, a two- to three-bag-high barrier should be sufficient. However, for more serious flooding risks, construct a pyramid-shaped barrier with a wider base that tapers towards the top for added stability. This prevents the wall from collapsing under pressure.
5. Seal the Barrier
To further strengthen the sandbag wall:
- Cover the entire structure with a plastic sheet and secure it with extra sandbags to prevent water infiltration.
- Ensure the plastic extends past the last row of sandbags for the best seal.
6. Divert Water Effectively
Rather than blocking water entirely, it is often more effective to redirect it away from entry points such as doors and vents. Use sandbags strategically to guide water towards proper drainage areas rather than allowing it to accumulate near your home.
Final Tips
- Act early: Once flooding begins, it can be difficult to set up a sandbag barrier in time.
- Use gloves when handling sandbags to protect your hands from irritation.
- Dispose of used sandbags properly: Contaminated sandbags (exposed to floodwaters) should be disposed of according to local regulations.
By following these guidelines, you can help minimise water damage and protect your home during heavy rains or floods. Proper preparation and correct sandbag placement can make all the difference in an emergency.
For the most up to date information, visit the BOM or listen to official emergency broadcasts.
