Quick Answer
To reinforce a space blanket shelter for wind, use rocks or logs to weigh down the edges and corners, and consider adding additional layers of insulation or a waterproof covering. A minimum of 12 rocks or logs can provide sufficient stability. Alternatively, use cordage to tie the space blanket to a nearby tree or anchor point.
Securing Edges and Corners
Use rocks or logs with a diameter of at least 5-7 inches to weigh down the edges and corners of the space blanket shelter. This will help prevent the wind from lifting or ripping the blanket. Place 2-3 rocks or logs on each edge, spaced 1-2 feet apart, to create a stable perimeter. Make sure the rocks or logs are heavy enough to resist the wind force.
Additional Layers and Waterproofing
Consider adding additional layers of insulation, such as a sleeping pad or a bivy sack, to increase the shelter’s wind resistance. A waterproof covering, like a plastic bag or a tarp, can also be added on top of the space blanket to prevent wind-driven rain from entering the shelter. Use cordage to tie the waterproof covering to the space blanket and the rocks or logs.
Anchoring the Shelter
If possible, use cordage to tie the space blanket to a nearby tree or anchor point. This will help resist wind forces and prevent the shelter from being blown away. Use a figure-eight knot to secure the cordage to the tree or anchor point, and make sure the cordage is long enough to allow for some movement in the wind. A minimum of 10 feet of cordage is recommended for this purpose.
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