9#Anniehui5 C8 O* [8 Y; W1 Q& q% ~0 O
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Is it your greenhouse ? Look like it is a kind of transparent sheet attached to the wood frame, not glass or anything, right?
13#ceramistpalace7 A3 `4 a. @. R& l. j- M. ~6 |" Q
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It's two layers of greenhouse plastic that is inflated with air.
15#ceramistpalace : u9 v" {2 G4 D2 F( b( O2 u _ : U4 Q) `/ X2 D9 l& g* c) ~4 n * ^8 b D& P. w( @* _# _: {My 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.