9#Anniehui 2 o5 G: ^! u" V+ a5 T8 t# x: O3 j0 w7 m5 @+ P( t
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 S# x) N3 c5 h5 ?- e! G
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It's two layers of greenhouse plastic that is inflated with air.
15#ceramistpalace , K0 L/ f! `9 [* m) \+ T: R! N3 }& V/ Z' Q; M' p
9 E7 X) E" g3 u# O' Q3 |: [: [. MMy 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.