Discussion forum for the various methods and structures used for getting an early start on your growing season, extending it for several weeks or even year 'round.
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April 10, 2018 | #30 |
Tomatovillian™
Join Date: Jun 2012
Location: Illinois, zone 6
Posts: 8,407
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I am starting to learn that the real point of the double-inflated poly layer that is a common covering is not the increase in r-value nearly as much as it is that you don't drop 5 to 7 degrees below the outside temperature due to atmospheric radiation cooling. On a cold night this week, my single-layer poly structure felt like a refrigerator inside. I could feel the temperature difference on my skin when I stood outside and reached in.
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