9#Anniehui' [/ @8 _+ Z9 \# F4 l
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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 ( U) M, I0 Z/ U2 Y1 J- _; C8 T ( J) w! u7 d% J Q% g3 l6 ^/ X# F3 _7 _
It's two layers of greenhouse plastic that is inflated with air.
15#ceramistpalace - H' X4 F L9 F6 ] + n7 H( c: s5 E $ w: _. m0 h" E3 F9 t3 k+ ~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.