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Old February 13, 2018   #41
Cole_Robbie's Avatar
Join Date: Jun 2012
Location: Illinois, zone 6
Posts: 8,257

In the spring, I get about 10-15 degrees above the outside on a cloudy day, and up to 50+ above the outside on a sunny day, at least back when I had new plastic. My rating on it is 3-5 years, and I am just starting year 7. So it's not in the best shape, but what I have learned is that a perfect greenhouse is a solar cooker on a sunny day, so a few leaks here and there are mostly insignificant.
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