Quick Answer
Proper rain shedding in a tarp setup is ensured by creating a slope, securing the edges, and using proper tarp tension. The ideal slope is 1:12 or greater, with the tarp edges anchored securely to the frame.
Creating a Slope
To achieve the required slope, ensure the tarp’s peak is at least 6-8 inches higher than the edges. This can be achieved by adjusting the tarp’s attachment points or using additional supports. For example, if you have a ridgeline, consider adding a 4-6 inch spacer to create the necessary slope.
Securing the Edges
Secure the tarp edges to the frame or anchors using rope or cordage. Use a minimum of two attachment points per edge, spaced evenly apart (about 2-3 feet). This will prevent the tarp from flapping or sagging, allowing water to run off. Use tensioning techniques, such as the “bowline knot,” to maintain consistent edge tension.
Tarp Tension and Rain Shedding
Achieve optimal tarp tension by pulling the edges tight and securing them in place. This will create a smooth surface for water to run off. Check the tarp tension regularly, especially during changing weather conditions. A well-tensioned tarp will shed rain effectively, reducing the risk of leaks and water accumulation. Consider using a “tarp tensioning system” or “adjustable ridgeline” to simplify tensioning and maintain optimal tarp tension.
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