Using a tarp is an effective way to add an extra layer of waterproofing to your tent, protecting you from rain and ground moisture. You can achieve this by either placing the tarp underneath your tent as a ground shield or by suspending it over your tent as a rain fly.
Here are the two primary methods for waterproofing your tent using a tarp, incorporating information from the reference:
Method 1: Using a Tarp as a Ground Shield (Under the Tent)
One way to utilize a tarp for waterproofing is to pitch your tent on top of a tarp as an extra ground shield. This technique protects the tent floor from ground moisture, preventing water from seeping up through the fabric.
- Purpose: Prevents ground moisture and water from pooling under the tent and seeping through the floor.
- Setup: Lay the tarp flat on the ground where you plan to pitch your tent. Ensure the tarp is slightly smaller than your tent floor, or fold any excess material so it doesn't extend beyond the tent's footprint. If the tarp sticks out, it can catch rain and channel it directly under your tent, which is the opposite of what you want.
- Benefits: Protects the tent floor, adds durability to the tent bottom, and keeps the tent cleaner.
- Best For: Preventing water ingress from below, especially on damp or muddy ground.
Method 2: Using a Tarp as an Overhead Rain Fly (Over the Tent)
Another effective method is to use the tarp as an added layer of protection, placing it over your tent. This creates a secondary roof, diverting rain away from your tent's rain fly and body.
- Purpose: Provides extra protection from heavy rain, snow, or even intense sun, acting as a backup or enhanced rain fly.
- Setup: Suspend the tarp above your tent using poles, trees, or other anchor points. Angle the tarp so water runs off away from the tent doors and sides. Leave a gap between the tent and the tarp to allow for airflow, which helps reduce condensation. Tarp kits that include poles and guy lines are your best bet for easy DIY tent waterproofing because you'll have all the tools necessary for quick assembly.
- Benefits: Offers superior rain protection, can create a covered vestibule area outside the tent, and helps protect the tent fabric from UV damage.
- Best For: Anticipating heavy rainfall, extending the life of your tent's rain fly, or adding covered living space.
Choosing the Right Tarp
The type of tarp matters. Look for tarps made from waterproof materials like ripstop nylon or polyester with a durable waterproof coating (often measured in hydrostatic head). The size should be appropriate for your tent and intended use.
- For an underlayment, choose a size slightly smaller than your tent footprint.
- For an overhead fly, choose a size large enough to cover the entire tent with overhang for runoff, considering different pitching configurations.
Practical Tips
- Pitching: Practice pitching your tarp in different configurations (A-frame, diamond, lean-to) before your trip.
- Guy Lines: Use strong guy lines and sturdy stakes to secure the tarp properly, especially when using it overhead to withstand wind and rain.
- Angle: Always angle the tarp to ensure water runs off efficiently and away from your tent.
| Method | Placement | Primary Benefit | Key Consideration |
|---|---|---|---|
| Ground Shield | Under the tent | Prevents ground moisture | Must be smaller than tent footprint |
| Overhead Rain Fly | Over the tent | Diverts rain/adds shelter | Requires poles/anchor points, airflow |
Using a tarp, whether under or over your tent, significantly enhances its waterproof capabilities, keeping you drier and more comfortable during your camping trip.
