Sweaty Southern Slabs

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Here’s why wet concrete and stone in winter are common along the coast

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If you live anywhere in a warm, humid coastal area, you’re no doubt familiar with wet concrete in winter. Some days you walk outside and find the carport slab is soaking wet. How did it happen? Did rain blow into the carport? If it’s not rain, is it moisture from the ground that came up through the concrete? Could it be condensation from the water vapor in the air? Let’s take a look.

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[source: http://www.greenbuildingadvisor.com/articles/dept/building-science/sweaty-southern-slabs]

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