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Solving water intrusion problems
1. Natural gravity
To avoid any water penetration it is necessary to
have:
a) The proper barrier, without any breach
so that the rain cannot penetrate at all.
b) The proper sloping. (Minimum ¼” per
foot.) A good example is the teepee;
built of materials that are hardly
waterproofed. The interior will remain
dry because the design sheds the water
off immediately. However, use the same
material in a horizontal or minimally
sloped area and water will penetrate the
same material.