9#Anniehui 4 J! O7 p$ }) P0 X & T6 W8 G4 W8 |/ ]Is 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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It's two layers of greenhouse plastic that is inflated with air.
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2 D4 l6 g$ \) f/ z7 n 9 Q- r+ F* j- e" N) Y8 bMy 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.