6 W) H6 c+ H9 L6 D/ F7 r: zIs it your greenhouse ? Look like it is a kind of transparent sheet attached to the wood frame, not glass or anything, right?
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: }+ ^2 w+ P# }$ hMy husband seals the plastic layers himself, then use a small fan to blow air between the two layers. The plastic can only be bought at Horticulture supply stores.