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Old September 5, 2016   #22
Cole_Robbie
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Join Date: Jun 2012
Location: Illinois, zone 6
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Those old windows were made to be mounted vertically. They are great for that purpose in your greenhouse. However, they were never meant to be a roof. You will have to overcome the issue of water pooling on them, and you won't want to be underneath them the first time a decent-sized hail stone hits, or it will maim you for life.
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