Rot proof hessian sandbags, supplied empty with ties, for longer-lasting flood defences and weighting down on site, used by contractors and facilities teams.
- Rot proof treated hessian
- Lasts longer outdoors than standard hessian
- Reduced water intake
- Holds approx. 12.5kg of sand
- Tie strings for secure closure
- Supplied empty, fill on site
- For flood defence and weighting down
- Pack of 50
- Size 13" x 30" (33cm x 76cm)
Rot Proof Hessian Sandbags 13" x 30" (33cm x 76cm)
Rot proof hessian sandbags, supplied empty with ties, for longer-lasting flood defences and weighting down on site, used by contractors and facilities teams.
- Rot proof treated hessian
- Lasts longer outdoors than standard hessian
- Reduced water intake
- Holds approx. 12.5kg of sand
- Tie strings for secure closure
- Supplied empty, fill on site
- For flood defence and weighting down
- Pack of 50
- Size 13" x 30" (33cm x 76cm)
- Buy 100 for £1.50 £1.25 each and save 10%
- Buy 500 for £1.31 £1.09 each and save 22%
| BULK DISCOUNT | 100 | 500 |
|---|---|---|
| Price | £1.25 £1.50 | £1.09 £1.31 |
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Log in to access trade discountsRot Proof Hessian Sandbags 13" x 30"
Rot proof hessian sandbags are woven hessian sacks treated to resist rot and weather, supplied empty for filling with sand or grit on site. Each bag holds approximately 12.5kg of sand and closes with a tie string at the mouth. Filled bags stack into walls to slow and divert flood water, and weight down signs, barriers and covers on site.
How Rot Proofing Keeps Sandbags Working for Longer
Standard hessian sandbags start to break down soon after they get wet, so a wall left out for weeks can split and spill its fill. On site, that means rebuilding defences or clearing burst bags in the middle of a wet season. Rot proof treated hessian resists rotting and takes in less water, so filled bags hold their shape for longer outdoors.
Key Features
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Rot proof treated hessian: resists rotting in damp conditions, for longer outdoor use than standard hessian.
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Reduced water intake: the treated fabric absorbs less water, so filled bags stay firmer.
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Approx. 12.5kg fill: a manageable weight to lift, carry and stack by hand.
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Tie string mouth: closes the bag quickly and securely once filled.
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Supplied empty and flat: stores compactly until needed and is filled on site with local sand or grit.
Who is this for
Trades and roles
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Site managers
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Groundworkers
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Facilities managers
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Highways and traffic management teams
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Housing maintenance teams
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Emergency response teams
Industries
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Construction
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Civil engineering
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Facilities management
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Local authorities
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Utilities
Specifications
| Specification | Detail |
|---|---|
| Product name | Rot Proof Hessian Sandbags 13" x 30" (33cm x 76cm) |
| Product code | HESSRT |
| Product type | Rot proof hessian sandbag, supplied empty |
| Material | Rot resistant treated woven hessian |
| Treatment | Resists rot and weather, reduced water intake |
| Closure | Tie string at the mouth |
| Fill capacity | Approx. 12.5kg of sand per bag |
| Fill | Sand, grit or similar, filled on site |
| Waterproof | No |
| Size (empty, flat) | 13" x 30" (33cm x 76cm) |
Compatibility
| Base material, tool or condition | Suitability |
|---|---|
| Flood defence walls at doors and entrances | Suitable |
| Longer-term outdoor use in damp conditions | Suitable, the rot proof treatment slows deterioration |
| Weighting down road signs, barriers and tarpaulins | Suitable |
| Stabilising scaffold bases and materials on site | Suitable |
| Diverting surface water on site | Suitable |
| Filling with sharp sand or grit | Suitable |
| Polythene sheeting or a tarpaulin behind the wall | Suitable, improves the barrier |
| Watertight seal on their own | Not recommended, sandbags slow water rather than seal it |
| Permanent flood defence | Not recommended, use a fixed flood defence |
| Oil or chemical spills | Not recommended, use a spill kit |
| Lifting by hook or sling | Not recommended, not a lifting bag |
Typical Users and Projects
Site managers, highways teams and facilities managers use rot proof sandbags where defences or ballast must stay outdoors for weeks rather than days. Typical settings are construction sites, depots, roadworks and buildings at risk of surface water flooding. They suit teams that fill bags on site from local sand or grit.
Typical applications
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Building a sandbag wall across a doorway or entrance ahead of forecast flooding.
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Diverting surface water away from excavations and site cabins.
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Weighting down temporary road signs and barrier feet during roadworks.
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Stabilising scaffold bases and stacked materials on a construction site.
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Holding down tarpaulins and sheeting over stockpiles.
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Keeping a reserve of empty bags in a facilities store for flood season.
How to use
Step 1: Fill each bag about half to two-thirds full with sand or grit, up to approximately 12.5kg, so it can be shaped.
Step 2: Tie the mouth with the tie string, leaving enough slack to fold the top under.
Step 3: Lay the first row tight together with the tied end facing away from the water, pressing each bag flat.
Step 4: Lay the next row staggered like brickwork, so the joints don’t line up.
Step 5: For a better barrier, lay polythene sheeting or a tarpaulin on the water side before stacking.
Step 6: After a flood, dispose of bags that have touched flood water, following local authority guidance.
Common mistakes
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Filling bags to the top, so they can’t be shaped and leave gaps.
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Lining up joints instead of staggering them.
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Expecting a sandbag wall to be watertight.
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Using standard hessian bags where defences will stay out for weeks.
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Reusing bags that have sat in contaminated flood water.
Safety
Each filled bag weighs around 12.5kg, so follow HSE guidance under the Manual Handling Operations Regulations 1992, keep loads close and share repetitive lifting. Flood water can carry sewage and chemicals, so wear waterproof gloves and wash your hands after handling used bags. Never work in fast-flowing flood water.
Maintenance
Store empty bags somewhere dry until needed. Check filled walls regularly for splits or slumping and replace any damaged bags.
Frequently Asked Questions
Q: What is the difference between standard and rot proof hessian sandbags?
A: Rot proof hessian is treated to resist rot and take in less water. Standard hessian starts to break down soon after it gets wet, while rot proof bags last longer outdoors, so they suit defences that stay in place for weeks.
Q: What does 13" x 30" mean on a sandbag?
A: It is the size of the empty bag laid flat: 13 inches (33cm) wide and 30 inches (76cm) long. Once filled and tied, the bag is shorter and thicker.
Q: Are rot proof hessian sandbags waterproof?
A: No. The treatment protects the fabric from rotting but does not make it waterproof. A sandbag wall slows and diverts water rather than sealing it, so lay polythene sheeting on the water side for a better barrier.
Q: What are these sandbags not suitable for?
A: They are not suitable as a watertight seal on their own, as a permanent flood defence, for oil or chemical spills, or for lifting by hook or sling.
Q: Should I use sandbags or water activated flood cubes?
A: Sandbags are filled on site with sand or grit, and rot proof bags suit defences left out for weeks. Flood cubes need no sand and activate with fresh water in about 5 minutes, so they suit fast response where sand isn’t to hand.
Q: How much sand does each bag hold, and how full should I fill it?
A: Each bag holds approximately 12.5kg of sand. Fill it about half to two-thirds full, so you can fold the top under and press it flat into the wall.
Q: How do I build a sandbag wall?
A: Lay the first row tight together, then stagger the next row like brickwork. Press each bag down as you go, and lay polythene sheeting on the water side to reduce seepage.
Q: How should I store sandbags?
A: Keep empty bags flat and dry until needed. Check filled walls regularly and replace any bags that split or slump.
