Quick Answer
For lining a snow cave sleeping area, the best materials include dry leaves, grass, or pine needles to absorb moisture and provide insulation, while a waterproof layer such as plastic or a tarp can help prevent water penetration from the snow walls. Boughs or sticks can also be used to create a base layer for added support and insulation.
Lining Materials Selection
When selecting materials for lining a snow cave sleeping area, consider what is readily available in your environment. Dry leaves, grass, or pine needles are excellent choices because they are typically dry, can be easily obtained, and provide good insulation against moisture. Avoid using materials that are damp or wet, as they can create a cold and damp microclimate within the snow cave.
Creating a Base Layer
A base layer of boughs or sticks can help support the insulation materials and prevent them from coming into contact with the snow walls. This layer should be about 2-3 inches thick and cover the entire floor area. To create this layer, simply place the boughs or sticks side by side, overlapping them to ensure complete coverage.
Waterproof Layer Application
To prevent water penetration from the snow walls, apply a waterproof layer to the insulation materials. This can be achieved by draping a plastic tarp or a sheet of waterproof material over the insulation layer. Secure the tarp with snow anchors or boulders to prevent it from shifting or getting dislodged during the night. Make sure the tarp is not directly in contact with the insulation materials to prevent moisture buildup.
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