To stop water from getting under your shed, you need to implement several preventative measures that address potential entry points and improve drainage around the structure. Here's a breakdown of effective solutions:
Addressing Water Intrusion Under Your Shed
Water intrusion can damage your shed's foundation, encourage rot, and create a damp environment. Here's how to tackle the problem:
1. Install a Damp Proof Membrane (DPM)
A DPM is a waterproof barrier that prevents moisture from rising through the ground into the shed's base.
- Process: Lay the DPM on the ground before building or placing the shed. It should extend beyond the shed's footprint.
- Materials: Use a heavy-duty polyethylene sheet.
2. Use Pressure-Treated Timber
Pressure-treated timber is resistant to rot and insect infestation, crucial for parts of the shed in direct contact with the ground or susceptible to moisture.
- Application: Use pressure-treated wood for the shed's base, skids, or framing that touches the ground.
- Benefit: Extends the lifespan of your shed by resisting water damage.
3. Apply Silicone-Based Sealant
Seal any gaps or cracks in the shed's base or walls where water could potentially enter.
- Where to Apply: Seal around the perimeter of the shed where the walls meet the base, and any visible cracks or joints.
- Product: Use a high-quality, waterproof silicone-based sealant designed for exterior use.
4. Fit a Metal or Plastic Base
A metal or plastic base provides a solid, waterproof barrier between the shed and the ground.
- Types: Consider pre-fabricated plastic or metal shed bases designed for easy installation.
- Advantages: Elevates the shed slightly, improving drainage and preventing direct contact with wet ground.
5. Utilize Gravel Borders
A gravel border around the shed helps to divert water away from the base.
- Construction: Create a border of gravel at least 12 inches wide around the shed.
- Purpose: Allows water to drain away from the shed's foundation, preventing it from pooling and seeping underneath.
6. Incorporate Skirting Boards
Skirting boards along the base of the shed can help prevent water from splashing up and under the structure.
- Installation: Attach skirting boards made of pressure-treated timber or composite material to the bottom of the shed walls.
- Function: Acts as a physical barrier against rainwater and debris.
Additional Considerations
- Proper Drainage: Ensure the ground around your shed slopes away from the structure. If necessary, regrade the area to improve drainage. Consider installing a French drain if water consistently pools nearby.
- Roof Overhang: A larger roof overhang can help deflect rainwater away from the shed's walls and base.
- Regular Maintenance: Inspect your shed regularly for any signs of damage or water intrusion and address them promptly. Re-seal any cracks or gaps as needed.
By implementing these strategies, you can effectively minimize and eliminate water coming under your shed, protecting its structural integrity and the items stored inside.
