9#Anniehui* ]! k5 `. A4 U- I9 ^" J
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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#ceramistpalace . b: [/ D: k2 G$ O9 |0 W. y# a* J! b8 `; t' O5 P
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It's two layers of greenhouse plastic that is inflated with air.
# d% I) J, {8 S) x7 [ 5 {0 C2 ?7 Z3 e3 f# W. M# z/ w2 V* ?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.